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A collection of scholarly literature created by experts and professionals in their fields. Included are theses, books, abstracts and articles.



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PubMed Central
by ?hre, Beate; Saltnes, Hege; von Tetzchner, Stephen; Falkum, Erik
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This article is from BMC Psychiatry , volume 14 . Abstract Background: There is a need for psychiatric assessment instruments that enable reliable diagnoses in persons with hearing loss who have sign language as their primary language. The objective of this study was to assess the validity of the Norwegian Sign Language (NSL) version of the Mini International Neuropsychiatric Interview (MINI). Methods: The MINI was translated into NSL. Forty-one signing patients consecutively referred to two...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4060880
PubMed Central
by ?iestad, Britt Elin; ?steras, Nina; Frobell, Richard; Grotle, Margreth; Br?gger, Helga; Risberg, May Arna
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This article is from BMC Musculoskeletal Disorders , volume 14 . Abstract Background: Despite an extensive literature on treatment interventions for patients with knee osteoarthritis, studies comparing the efficacy of different exercise interventions and living the life as usual on quality of life, cartilage quality and cost-effectiveness are lacking. The aim of the present study is to compare the efficacy of two different exercise programs compared to a control group in individuals with...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3847462
PubMed Central
by ?stergaard, Michael E.; Southwell, Amber L.; Kordasiewicz, Holly; Watt, Andrew T.; Skotte, Niels H.; Doty, Crystal N.; Vaid, Kuljeet; Villanueva, Erika B.; Swayze, Eric E.; Frank Bennett, C.; Hayden, Michael R.; Seth, Punit P.
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This article is from Nucleic Acids Research , volume 41 . Abstract Autosomal dominant diseases such as Huntington’s disease (HD) are caused by a gain of function mutant protein and/or RNA. An ideal treatment for these diseases is to selectively suppress expression of the mutant allele while preserving expression of the wild-type variant. RNase H active antisense oligonucleotides (ASOs) or small interfering RNAs can achieve allele selective suppression of gene expression by targeting single...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3834808
PubMed Central
by ?stern, Rune; Fagerheim, Toril; Hjellnes, Helene; Nygard, Bj?rn; Mellgren, Svein Ivar; Nilssen, ?ivind
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This article is from BMC Medical Genetics , volume 15 . Abstract Background: The identification of disease causing, or putative disease causing, mutations in index patients with Charcot-Marie-Tooth disease (CMT) allows for genetic testing of family members. Relevant variants identified in index patients are of either definite, likely or uncertain pathogenicity. The main objective of this study was to make an evaluation of the family investigations performed as part of the assessment of genetic...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3900263
PubMed Central
by ?ynebraten, Inger; Hinkula, Jorma; Fredriksen, Agnete B.; Bogen, Bjarne
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This article is from PLoS ONE , volume 9 . Abstract DNA vaccines based on subunits from pathogens have several advantages over other vaccine strategies. DNA vaccines can easily be modified, they show good safety profiles, are stable and inexpensive to produce, and the immune response can be focused to the antigen of interest. However, the immunogenicity of DNA vaccines which is generally quite low needs to be improved. Electroporation and co-delivery of genetically encoded immune adjuvants are...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4133255
Arxiv.org
by A . H. Prestwich; J. A. Irwin; R. E. Kilgard; M. I. Krauss; A. Zezas; F. Primini; P. Kaaret
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The X-ray populations of Local group galaxies have been classified in detail by Einstein, ROSAT and ASCA revealing a mix of binaries, supernova remnants and HII regions. However, these observatories were unable to resolve X-ray sources in galaxies beyond the local group. With Chandra's exquisite spatial resolution we are able to resolve sources in a sample of nearby galaxies. We show that there are highly significant differences in the X-ray colors of sources in bulge and disk systems. These...
Source: http://arxiv.org/abs/astro-ph/0206127v2
Arxiv.org
by A . Rahaman; Ushasi Datta; T. Aumann; S. Beceiro-Novo; K. Boretzky; C. Caesar; B. V. Carlson; W. N. Catford; S. Chakraborty; M. Chartier; D. Cortina-Gil; G. De. Angelis; D. Gonzalez-Diaz; H. Emling; P. Diaz Fernandez; L. M. Fraile; O. Ershova; H. Geissel; B. Jonson; H. Johansson; N. Kalantar-Nayestanaki; R. Krücken; T. Kröll; J. Kurcewicz; C. Langer; T. Le Bleis; Y. Leifels; G. Münzenberg; J. Marganiec; T. Nilsson; C. Nociforo; A. Najafi; V. Panin; S. Paschalis; R. Plag; R. Reifarth; C....
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First results are reported on the ground state configurations of the neutron-rich $^{29,30}$Na isotopes, obtained via Coulomb dissociation (CD) measurements as a method of the direct probe. The invariant mass spectra of those nuclei have been obtained through measurement of the four-momentum of all decay products after Coulomb excitation on a $^{208}Pb$ target at energies of 400-430 MeV/nucleon using FRS-ALADIN-LAND setup at GSI, Darmstadt. Integrated Coulomb-dissociation cross-sections (CD) of...
Topics: Nuclear Experiment, Nuclear Theory
Source: http://arxiv.org/abs/1601.04002
Arxiv.org
by A A Usmani; Farook Rahaman; Saibal Ray; K K Nandi; Peter K. F. Kuhfittig; Sk. A Rakib; Z Hasan
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We propose a new model of a {\it gravastar} admitting conformal motion. While retaining the framework of the Mazur-Mottola model, the gravastar is assumed to be internally charged, with an exterior defined by a Reissner-Nordstr{\"o}m rather than a Schwarzschild line element. The solutions obtained involve (i) the interior region, (ii) the shell, and (iii) the exterior region of the sphere. Of these three cases the first case is of primary interest since the total gravitational mass...
Source: http://arxiv.org/abs/1012.5605v2
Arxiv.org
by A Esposito; F Piccinini; A Pilloni; AD Polosa
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We propose a mechanism allowing the formation of loosely bound molecules of charmed mesons in high energy proton-(anti)proton collisions.
Source: http://arxiv.org/abs/1305.0527v1
Arxiv.org
by A F Garcia Marin; V Wand; F Steier; F Guzman Cervantes; J Bogenstahl; O Jennrich; G Heinzel; K Danzmann
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This paper presents a procedure to perform fully autonomous on-orbit alignment of the interferometer on board the LISA Technology Package (LTP). LTP comprises two free-floating test masses as inertial sensors that additionally serve as end mirrors of a set of interferometers. From the output signals of the interferometers, a subset has been selected to obtain alignment information of the test masses. Based on these signals, an alignment procedure was developed and successfully tested on the...
Source: http://arxiv.org/abs/physics/0604011v1
Arxiv.org
by A Franz; for the PHENIX Collaboration
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This contribution highlights recent results from the PHENIX Collaboration at RHIC. It covers global variables, flow and 2--particle correlations. A second contribution in this issue, by T.C.Awes, covers PHENIX results on heavy quarks, leptons and photons.
Source: http://arxiv.org/abs/0805.1718v1
Arxiv.org
by A Jooste; K Jordaan; F Tookos
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We investigate the zeros of a family of hypergeometric polynomials $_2F_1(-n,-x;a;t)$, $n\in\nn$ that are known as the Meixner polynomials for certain values of the parameters $a$ and $t$. When $a=-N$, $N\in\nn$ and $t=\frac1{p}$, the polynomials $K_n(x;p,N)=(-N)_n\phantom{}_2F_1(-n,-x;-N;\frac1{p})$, $n=0,1,...N$, $0 n-1$, the quasi-orthogonal polynomials $K_{n}(x;p,a)$, $k-1 1$ or $p
Source: http://arxiv.org/abs/0901.0817v3
Arxiv.org
by A Kambili; A B Walker; F Qiu; A C Fisher; A D Savin; L M Peter
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Dye sensitised nanocrystalline solar cells (Gr\"{a}tzel cells) have achieved solar-to-electrical energy conversion efficiencies of 12% in diffuse daylight. The cell is based on a thin film of dye-sensitised nanocrystalline TiO$_2$ interpenetrated by a redox electrolyte. The high surface area of the TiO$_2$ and the spectral characteristics of the dye allow the device to harvest 46% of the solar energy flux. One of the puzzling features of dye-sensitised nano-crystalline solar cells is the...
Source: http://arxiv.org/abs/cond-mat/0107551v1
Arxiv.org
by A M Rogers; W G Lynch; M A Famiano; M S Wallace; F Amorini; D Bazin; R J Charity; F Delaunay; R T de Souza; J Elson; A Gade; D Galaviz; S Hudan; J Lee; S Lobostov; S Lukyanov; M Matos; M Mocko; M B Tsang; D Shapira; L G Sobotka; G Verde
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The first direct measurement of the proton separation energy, Sp, for the proton-unbound nucleus 69Br is reported. Of interest is the exponential dependence of the 2p-capture rate on Sp which can bypass the 68Se waiting-point in the astrophysical rp process. An analysis of the observed proton decay spectrum is given in terms of the 69Se mirror nucleus and the influence of Sp is explored within the context of a single-zone X-ray burst model.
Source: http://arxiv.org/abs/1009.2950v1
Arxiv.org
by A Marzuoli; F A Raffa; M Rasetti
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We explore a variety of reasons for considering su(1,1) instead of the customary h(1) as the natural unifying frame for characterizing boson systems. Resorting to the Lie-Hopf structure of these algebras, that shows how the Bose-Einstein statistics for identical bosons is correctly given in the su(1,1) framework, we prove that quantization of Maxwell's equations leads to su(1,1), relativistic covariance being naturally recognized as an internal symmetry of this dynamical algebra. Moreover...
Topics: Quantum Physics, Mathematics, Mathematical Physics
Source: http://arxiv.org/abs/1406.2908
Arxiv.org
by A N Theron; F G Scholtz; H B Geyer
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We show how to bosonize two-dimensional non-abelian models using finite chiral determinants calculated from a Gauss decomposition. The calculation is quite straightforward and hardly more involved than for the abelian case. In particular, the counterterm $A\bar A$, which is normally motivated from gauge invariance and then added by hand, appears naturally in this approach.
Source: http://arxiv.org/abs/hep-th/9709163v1
Arxiv.org
by A N Theron; F G Scholtz; H B Geyer
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We discuss various bosonization schemes from a path integral perspective. Our analysis shows that the existence of different bosonization schemes, such as abelian bosonization of non-abelian models and non-abelian bosonization of fermions with colour and flavour indices, can be understood as different ways of factoring out a dynamically trivial coset which contains the fermions. From this perspective follows the importance of the coset model in ensuring the correct superselection rules on the...
Source: http://arxiv.org/abs/hep-th/9711024v1
Arxiv.org
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We study the diamagnetism induced by thermal fluctuations above the superconducting transition of the iron pnictide Ba(Fe$_{1-x}$Ni$_x$)$_2$As$_2$ with different doping levels. The measurements are performed with magnetic fields up to 7 T applied in the two main crystal directions. These data provide double information: first, they confirm at a quantitative level the applicability to these materials of a 3D-anisotropic Ginzburg-Landau approach valid in the finite field regime. Then, they allow...
Topics: Superconductivity, Condensed Matter
Source: http://arxiv.org/abs/1506.00170
Arxiv.org
by A S Barabash; F Hubert; Ph Hubert; V Umatov
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New limits on the double beta processes for $^{120}$Te have been obtained using a 400 cm$^3$ HPGe detector and a source consisting of natural Te0$_2$ powder. At a confidence level of 90% the limits are $0.19\times 10^{18}$ y for the $\beta^+$EC$(0\nu + 2\nu)$ transition to the ground state, $0.75\times 10^{18}$ y for the ECEC$(0\nu + 2\nu)$ transition to the first 2$^+$ excited state of $^{120}$Sn (1171.26 keV) and $(0.19-0.6)\times 10^{18}$ y for different ECEC($0\nu$) captures to the ground...
Source: http://arxiv.org/abs/nucl-ex/0703020v2
Arxiv.org
by A Shirzad; F Loran
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In a recent work we showed that for a Hamiltonian system with constraints, the set of constraints can be investigated in first and second class constraint chains. We show here that using this "chain by chain" method for an arbitrary system one can fix the gauges in the most economical and consistent way. We show that it is enough to assume some gauge fixing conditions conjugate to last elements of first class chains. The remaining necessary conditions would emerge from consistency...
Source: http://arxiv.org/abs/hep-th/9912289v2
Arxiv.org
by A Zonca; C Franceschet; P Battaglia; F Villa; A Mennella; O D'Arcangelo; R Silvestri; M Bersanelli; E Artal; R C Butler; F Cuttaia; R J Davis; S Galeotta; N Hughes; P Jukkala; V-H Kilpia; M Laaninen; N Mandolesi; M Maris; L Mendes; M Sandri; L Terenzi; J Tuovinen; J Varis; A Wilkinson
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The Low Frequency Instrument (LFI) is an array of pseudo-correlation radiometers on board the Planck satellite, the ESA mission dedicated to precision measurements of the Cosmic Microwave Background. The LFI covers three bands centred at 30, 44 and 70 GHz, with a goal bandwidth of 20% of the central frequency. The characterization of the broadband frequency response of each radiometer is necessary to understand and correct for systematic effects, particularly those related to foreground...
Source: http://arxiv.org/abs/1001.4589v1
Arxiv.org
by A de Ugarte Postigo; T. A. Fatkhullin; G. Johannesson; J. Gorosabel; V. V. Sokolov; A. J. Castro-Tirado; Yu. Yu. Balega; O. I. Spiridonova; M. Jelinek; S. Guziy; D. Perez-Ramirez; J. Hjorth; P. Laursen; D. Bersier; S. B. Pandey; M. Bremer; A. Monfardini; K. Y. Huang; Y. Urata; W. H. Ip; T. Tamagawa; D. Kinoshita; T. Mizuno; Y. Arai; H. Yamagishi; T. Soyano; F. Usui; M. Tashiro; K. Abe; K. Onda; Z. Aslan; I. Khamitov; T. Ozisik; U. Kiziloglu; I. Bikmaev; N. Sakhibullin; R. Burenin; M. Pavlinsky;...
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Aims. Understand the shape and implications of the multiband light curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the onset of the gamma-ray event to several months after, when we only detect the host galaxy. Together with X-ray, millimetre and radio observations we compile what, to our knowledge, is the most complete multiband coverage of an XRR burst afterglow to date. Results. The optical and X-ray light curve is...
Source: http://arxiv.org/abs/astro-ph/0612545v1
PubMed Central
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This article is from Pakistan Journal of Medical Sciences , volume 30 . Abstract Background & Objectives: We report 17 years outcome of subsequent pregnancies of women with severe Mitral Stenosis (MS) who underwent Mitral Balloon Valvuloplasty (MBV) during pregnancy and the follow up of the children born of such pregnancies.Methods: Twenty three pregnant patients suffering from severe MS (NYHA-New York Heart Association class III/IV) who underwent MBV by Inoue balloon catheter technique...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3955548
PubMed Central
by A, Taccaliti; F, Silvetti; G, Palmonella; M, Boscaro
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This article is from Current Genomics , volume 12 . Abstract Medullary thyroid carcinoma (MTC) is a rare calcitonin producing neuroendocrine tumour that originates from the parafollicular C-cells of the thyroid gland. The RET proto-oncogene encodes the RET receptor tyrosine kinase, with consequently essential roles in cell survival, differentiation and proliferation. Somatic or germline mutations of the RET gene play an important role in this neoplasm in development of sporadic and familial...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3271314
Arxiv.org
by A-M. Dumont; S. Collin; F. Paletou; S. Coupé; O. Godet; D. Pelat
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In the era of XMM-Newton and Chandra missions, it is crucial to use codes able to compute correctly the line spectrum of X-ray irradiated thick media (Thomson thickness of the order of unity) to build models for the structure and the emission of the central regions of AGN or X-ray binaries. In all photoionized codes except in our code Titan, the line intensities are computed with the "escape probability approximation". In its last version, Titan solves the transfer of a thousand lines...
Source: http://arxiv.org/abs/astro-ph/0306297v1
Arxiv.org
by A. -A. Zakari-Issoufou; M. Fallot; A. Porta; A. Algora; J. L. Tain; E. Valencia; S. Rice; V. M Bui; S. Cormon; M. Estienne; J. Agramunt; J. Äystö; M. Bowry; J. A. Briz; R. Caballero-Folch; D. Cano-Ott; A. Cucoanes; V. -V. Elomaa; T. Eronen; E. Estévez; G. F. Farrelly; A. R. Garcia; W. Gelletly; M. B Gomez-Hornillos; V. Gorlychev; J. Hakala; A. Jokinen; M. D. Jordan; A. Kankainen; P. Karvonen; V. S. Kolhinen; F. G Kondev; T. Martinez; E. Mendoza; F. Molina; I. Moore; A. B. Perez-Cerdán; Zs....
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The antineutrino spectra measured in recent experiments at reactors are inconsistent with calculations based on the conversion of integral beta spectra recorded at the ILL reactor. $^{92}$Rb makes the dominant contribution to the reactor spectrum in the 5-8 MeV range but its decay properties are in question. We have studied $^{92}$Rb decay with total absorption spectroscopy. Previously unobserved beta feeding was seen in the 4.5-5.5 region and the GS to GS feeding was found to be 87.5(25)%. The...
Topics: High Energy Physics - Experiment, Nuclear Experiment
Source: http://arxiv.org/abs/1504.05812
Arxiv.org
by A. -L. Luo; Y. -H. Zhao; G. Zhao; L. -C. Deng; X. -W. Liu; Y. -P. Jing; G. Wang; H. -T Zhang; J. -R. Shi; X. -Q. Cui; Y. -Q. Chu; S. -G. Wang; S. -Q. Wang; X. Wang; Y. -N. Wang; Y. Wang; Y. -F. Wang; P. Wei; M. -Z. Wei; H. Wu; G. -P. Li; K. -F. Wu; X. -B. Wu; Y. Wu; Y. Z. Wu; X. -Z. Xing; L. -Z. Xu; X. -Q. Xu; Y. Xu; T. -S. Yan; D. -H. Yang; Z. -R. Bai; H. -F. Yang; H. -Q. Yang; M. Yang; Z. -Q. Yao; Y. Yu; H. Yuan; H. -B. Yuan; H. -L. Yuan; W. -M. Yuan; C. Zhai; Y. Cai; E. -P. Zhang; H. W....
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The Large sky Area Multi-Object Spectroscopic Telescope (LAMOST) General Survey is a spectroscopic survey that will eventually cover approximately half of the celestial sphere and collect 10 million spectra of stars, galaxies and QSOs. Objects both in the pilot survey and the first year general survey are included in the LAMOST First Data Release (DR1). The pilot survey started in October 2011 and ended in June 2012, and the data have been released to the public as the LAMOST Pilot Data Release...
Topics: Instrumentation and Methods for Astrophysics, Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1505.01570
Arxiv.org
by A. -L. Maire; A. J. Skemer; P. M. Hinz; S. Desidera; S. Esposito; R. Gratton; F. Marzari; M. F. Skrutskie; B. A. Biller; D. Defrère; V. P. Bailey; J. M. Leisenring; D. Apai; M. Bonnefoy; W. Brandner; E. Buenzli; R. U. Claudi; L. M. Close; J. R. Crepp; R. J. De Rosa; J. A. Eisner; J. J. Fortney; T. Henning; K. -H. Hofmann; T. G. Kopytova; J. R. Males; D. Mesa; K. M. Morzinski; A. Oza; J. Patience; E. Pinna; A. Rajan; D. Schertl; J. E. Schlieder; K. Y. L. Su; A. Vaz; K. Ward-Duong; G. Weigelt;...
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Context. Astrometric monitoring of directly-imaged exoplanets allows the study of their orbital parameters and system architectures. Because most directly-imaged planets have long orbital periods (>20 AU), accurate astrometry is challenging when based on data acquired on timescales of a few years and usually with different instruments. The LMIRCam camera on the LBT is being used for the LEECH survey to search for and characterize young and adolescent exoplanets in L' band, including their...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1412.6989
Arxiv.org
by A. -L. Maire; M. Bonnefoy; C. Ginski; A. Vigan; S. Messina; D. Mesa; R. Galicher; R. Gratton; S. Desidera; T. G. Kopytova; M. Millward; C. Thalmann; R. U. Claudi; D. Ehrenreich; A. Zurlo; G. Chauvin; J. Antichi; A. Baruffolo; A. Bazzon; J. -L. Beuzit; P. Blanchard; A. Boccaletti; J. de Boer; M. Carle; E. Cascone; A. Costille; V. De Caprio; A. Delboulbe; K. Dohlen; C. Dominik; M. Feldt; T. Fusco; J. H. Girard; E. Giro; D. Gisler; L. Gluck; C. Gry; T. Henning; N. Hubin; E. Hugot; M. Jaquet; M....
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[Abridged] Context. The young systems PZ Tel and HD 1160, hosting known low-mass companions, were observed during the commissioning of the new planet finder SPHERE with several imaging and spectroscopic modes. Aims. We aim to refine the physical properties and architecture of both systems. Methods. We use SPHERE commissioning data and REM observations, as well as literature and unpublished data from VLT/SINFONI, VLT/NaCo, Gemini/NICI, and Keck/NIRC2. Results. We derive new photometry and...
Topics: Astrophysics, Instrumentation and Methods for Astrophysics, Earth and Planetary Astrophysics
Source: http://arxiv.org/abs/1511.04072
Arxiv.org
by A. -L. Melchior; F. Combes
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We study the properties and the molecular content of the host of a type-Ia supernova (SN1997ey). This z=0.575 host is the brightest submillimetre source of the sample of type-Ia supernova hosts observed at 450um and 850um by Farrah et al.. Observations were performed at IRAM-30m to search for CO(2-1) and CO(3-2) lines in good weather conditions but no signal was detected. The star formation rate cannot exceed 50 M_sol/yr. These negative results are confronted with an optical analysis of a Keck...
Source: http://arxiv.org/abs/0707.3505v1
Arxiv.org
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The central kiloparsec region of the Andromeda galaxy is relatively gas poor, while the interstellar medium appears to be concentrated in a ring-like structure at about 10 kpc radius. The central gas depletion has been attributed to a possible head-on collision 200 Myr ago, supported by the existence of an offset inner ring of warm dust. We present new IRAM 30m radio telescope observations of the molecular gas in the central region, and the detection of CO and its isotopes $^{13}$CO(2-1) and...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1504.00863
Arxiv.org
by A. -L. Melchior; F. Combes
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We study a small sample of z=0.1-0.6 core-collapse supernova (CCSN) host galaxies. Continuum observations at 250GHz have been performed with MAMBO at the IRAM-30m telescope. None of these sources has been detected and the error-weighted mean flux is 0.25+/-0.32 mJy. Upper limits on their dust masses are derived and the corresponding sample mean corresponds to 1.4 +/- 2.2 x 10^8 Msol. These results are comparable with previous submillimetre observations of SN-Ia hosts performed by Farrah et al....
Source: http://arxiv.org/abs/0803.1934v1
Arxiv.org
by A. -L. Melchior; F. Combes
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We report on the results of an IRAM-30m search for CO emission lines in three galaxies at intermediate redshifts. The idea was to investigate the molecular content of galaxies bright in the infrared at z=0.4-1.5, a redshift desert for molecular line studies, poorly investigated as of yet. We integrated 8-10h per source and did not succeed in detecting any of the sources. From our upper limits, we are able to constrain the molecular gas content in these systems to less than 4 to 8 x 10^9 Mo,...
Source: http://arxiv.org/abs/0711.1093v1
Arxiv.org
by A. -L. Melchior; F. Combes
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With IRAM-30m/HERA, we have detected CO(2-1) gas complexes within 30 arcsec (~100 pc) from the center of M31 amounting to a minimum total mass of 4.2 x 10^4 Msol (one third of the positions are detected). Averaging the whole HERA field, we have shown that there is no additional undetected diffuse component. We show that the above gas detection is associated with gas lying on the far side as no extinction is observed in the optical, but some emission is present on infra-red Spitzer maps. The...
Source: http://arxiv.org/abs/1210.4316v1
Arxiv.org
by A. -L. Melchior; F. Combes; A. Gould
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We present a new determination of the surface brightness of our Galaxy at the Solar Neighbourhood as observed from outside the Galaxy. We rely on various existing optical and infra-red surveys to obtain a multiwavelength estimate. On the one hand, scattered light does not contribute significantly to the surface brightness. On the other hand, optical and infrared integrated all-sky surveys (Pioneer 10/11 and COBE/DIRBE) show a systematically larger value than our synthetic local estimate based...
Source: http://arxiv.org/abs/astro-ph/0610884v1
Arxiv.org
by A. -L. Melchior; F. Combes; B. Guiderdoni; S. Hatton
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The next generation of submillimetre/millimetre instruments will provide us with a deeper insight into the mechanisms that rule galaxy formation. As the brightest starbursts are thought to be heavily obscured at optical wavelengths, the opening of this new window will complement the present observations, and enable a detailed investigation of the hierarchical merging of galaxies at remote epochs. In this context, we will present preliminary results of simulations currently developed for deep...
Source: http://arxiv.org/abs/astro-ph/0102086v1
Arxiv.org
by A. -L. Melchior; F. Viallefond; M. Guelin; N. Neininger
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We report the first detection of CO in M31's bulge. The 12CO (1-0) and (2-1) lines are both detected in the dust complex D395A/393/384, at 1.3" (~0.35 kpc) from the centre. From these data and from visual extinction data, we derive a CO-luminosity to reddening ratio (and a CO-luminosity to H_2 column density ratio) quite similar to that observed in the local Galactic clouds. The (2-1) to (1-0) line intensity ratio points to a CO rotational temperature and a gas kinetic temperature > 10...
Source: http://arxiv.org/abs/astro-ph/0003037v1
Arxiv.org
by A. -M. Lagrange; D. Gratadour; G. Chauvin; T. Fusco; D. Ehrenreich; D. Mouillet; G. Rousset; D. Rouan; F. Allard; E. Gendron; J. Charton; L. Mugnier; P. Rabou; J. Montri; F. Lacombe
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Since the discovery of its dusty disk in 1984, Beta Pictoris has become the prototype of young early-type planetary systems, and there are now various indications that a massive Jovian planet is orbiting the star at ~ 10 AU. However, no planets have been detected around this star so far. Our goal was to investigate the close environment of Beta Pic, searching for planetary companion(s). Deep adaptive-optics L'-band images of Beta Pic were recorded using the NaCo instrument at the Very Large...
Source: http://arxiv.org/abs/0811.3583v1
Arxiv.org
by A. -M. Lagrange; K. De Bondt; N. Meunier; M. Sterzik; H. Beust; F. Galland
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Context. The {\beta} Pictoris system with its debris disk and a massive giant planet orbiting at \simeq 9 AU represents an ideal laboratory to study giant planet formation and evolution as well as planet-disk interactions. {\beta} Pic b can also help testing brightness-mass relations at young ages. Other planets, yet undetected, may of course be present in the system. Aims. We aim at putting direct constrains on the mass of {\beta} Pic b and at searching for additional jovian planets on orbits...
Source: http://arxiv.org/abs/1202.2579v1
Arxiv.org
by A. -M. Lagrange; M. Desort; F. Galland; S. Udry; M. Mayor
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(Abridged) Aims: Systematic surveys to search for exoplanets have been mostly dedicated to solar-type stars sofar. We developed in 2004 a method to extend such searches to earlier A-F type dwarfs and started spectroscopic surveys to search for planets and quantify the detection limit achievable when taking into account the stars properties and their actual levels of intrinsic variations. We give here the first results of our southern survey with HARPS. Results: 1) 64% of the 170 stars with...
Source: http://arxiv.org/abs/0809.4636v2
Arxiv.org
by A. -M. Lagrange; M. Langlois; R. Gratton; A. -L. Maire; J. Milli; J. Olofsson; A. Vigan; V. Bailey; D. Mesa; G. Chauvin; A. Boccaletti; R. Galicher; J. M. Girard; M. Bonnefoy; M. Samland; F. Menard; T. Henning; M. Kenworthy; C. Thalmann; H. Beust; J. -L. Beuzit; W. Brandner; E. Buenzli; A. Cheetham; M. Janson; H. le Coroller; J. Lannier; D. Mouillet; S. Peretti; C. Perrot; G. Salter; E. Sissa; Z. Wahhaj; L. Abe; S. Desidera; M. Feldt; F. Madec; D. Perret; C. Petit; P. Rabou; C. Soenke; L. Weber
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HD~106906AB is so far the only young binary system around which a planet has been imaged and a debris disk evidenced thanks to a strong IR excess. As such, it represents a unique opportunity to study the dynamics of young planetary systems. We aim at further investigating the close (tens of au scales) environment of the HD~106906AB system. We used the extreme AO fed, high contrast imager SPHERE recently installed on the VLT to observe HD~106906. Both the IRDIS imager and the Integral Field...
Topics: Astrophysics, Earth and Planetary Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1510.02511
Arxiv.org
by A. -M. Lagrange; N. Meunier; G. Chauvin; M. Sterzik; F. Galland; G. Lo Curto; J. Rameau; D. Sosnowska
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Stars in young nearby associations are the only targets allowing giant planet searches at all separations in the near future, by coupling indirect techniques such as radial velocity and deep imaging. These stars are first priorities targets for the forthcoming planets imagers on 10-m class telescopes. Young stars rotate more rapidly and are more active than their older counterparts. Both effects can limit the capability to detect planets using RV. We wish to explore the planet detection...
Source: http://arxiv.org/abs/1304.5505v2
Arxiv.org
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Stellar activity is a potential important limitation to the detection of low mass extrasolar planets with indirect methods (RV, photometry, astrometry). In previous papers, using the Sun as a proxy, we investigated the impact of stellar activity (spots, plages, convection) on the detectability of an Earth-mass planet in the habitable zone (HZ) of solar-type stars with RV techniques. We extend here the detectability study to the case of astrometry. We used the sunspot and plages properties...
Source: http://arxiv.org/abs/1101.2512v1
Arxiv.org
by A. -M. Tsopelakou; G. Margazoglou; Y. F. Contoyiannis; P. A. Kalozoumis; F. K. Diakonos; N. G. Fytas
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We propose a method for calculating the isothermal critical exponent $\delta$ in Ising systems undergoing a second-order phase transition. It is based on the calculation of the mean magnetization time series within a small connected domain of a lattice after equilibrium is reached. At the pseudocritical point, the magnetization time series attains intermittent characteristics and the probability density for consecutive values of mean magnetization within a region around zero becomes a power...
Topics: Statistical Mechanics, Condensed Matter
Source: http://arxiv.org/abs/1601.06306
Arxiv.org
by A. -N. Chené; J. Borissova; C. Bonatto; D. J. Majaess; G. Baume; J. R. A. Clarke; R. Kurtev; O. Schnurr; J. -C. Bouret; M. Catelan; J. P. Emerson; C. Feinstein; D. Geisler; R. de Grijs; A. Hervé; V. D. Ivanov; M. S. N. Kumar; P. Lucas; L. Mahy; F. Martins; F. Mauro; D. Minniti; C. Moni Bidin
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Context: The ESO Public Survey "VISTA Variables in the V\'ia L\'actea" (VVV) provides deep multi-epoch infrared observations for an unprecedented 562 sq. degrees of the Galactic bulge, and adjacent regions of the disk. In this survey nearly 150 new open clusters and cluster candidates have been discovered. Aims: This is the second in a series of papers about young, massive open clusters observed using the VVV survey. We present the first study of six recently discovered clusters....
Source: http://arxiv.org/abs/1211.2801v1
Arxiv.org
by A. -N. Chené; S. Ramírez Alegría; J. Borissova; E. O'Leary; F. Martins; A. Hervé; M. Kuhn; R. Kurtev; P. Consuelo Amigo Fuentes; C. Bonatto; D. Minniti
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Context The ESO Public Survey VISTA Variables in the V\'ia L\'actea (VVV) provides deep multi-epoch infrared observations for an unprecedented 562 sq. degrees of the Galactic bulge and adjacent regions of the disk. Nearly 150 new open clusters and cluster candidates have been discovered in this survey. Aims We present the fourth article in a series of papers focussed on young and massive clusters discovered in the VVV survey. This article is dedicated to the cluster VVV CL041, which contains a...
Topics: Astrophysics, Astrophysics of Galaxies, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1510.02539
Arxiv.org
by A. A. Abdo; A. U. Abeysekara; R. Alfaro; B. T. Allen; C. Alvarez; J. D. Álvarez; R. Arceo; J. C. Arteaga-Velázquez; T. Aune; H. A. Ayala Solares; A. S. Barber; D. Stump; K. Sparks Woodle; R. W. Springer; I. Taboada; P. A. Toale; K. Tollefson; I. Torres; T. N. Ukwatta; V. Vasileiou; L. Villaseñor; B. M. Baughman; G. P. Walker; T. Weisgarber; S. Westerhoff; D. A. Williams; I. G. Wisher; J. Wood; G. B. Yodh; P. W. Younk; D. Zaborov; A. Zepeda; N. Bautista-Elivar; H. Zhou; J. Becerra Gonzalez;...
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Primordial Black Holes (PBHs) are gravitationally collapsed objects that may have been created by density fluctuations in the early universe and could have arbitrarily small masses down to the Planck scale. Hawking showed that due to quantum effects, a black hole has a temperature inversely proportional to its mass and will emit all species of fundamental particles thermally. PBHs with initial masses of ~5.0 x 10^14 g should be expiring in the present epoch with bursts of high-energy particles,...
Topics: High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1407.1686
Arxiv.org
by A. A. Abdo; B. T. Allen; D. Berley; E. Blaufuss; S. Casanova; B. L. Dingus; R. W. Ellsworth; M. M. Gonzalez; J. A. Goodman; E. Hays; C. M. Hoffman; B. E. Kolterman; C. P. Lansdell; J. T. Linnemann; J. E. McEnery; A. I. Mincer; P. Nemethy; D. Noyes; J. M. Ryan; F. W. Samuelson; P. M. Saz Parkinson; A. Shoup; G. Sinnis; A. J. Smith; G. W. Sullivan; V. Vasileiou; G. P. Walker; D. A. Williams; X. W. Xu; G. B. Yodh
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Recent rapid localizations of short, hard gamma-ray bursts (GRBs) by the Swift and HETE satellites have led to the observation of the first afterglows and the measurement of the first redshifts from this type of burst. Detection of >100 GeV counterparts would place powerful constraints on GRB mechanisms. Seventeen short duration ( < 5 s) GRBs detected by satellites occurred within the field of view of the Milagro gamma-ray observatory between 2000 January and 2006 December. We have...
Source: http://arxiv.org/abs/0705.1554v1
Arxiv.org
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We present observations of the young Supernova remnant (SNR) RX J1713.7-3946 with the Fermi Large Area Telescope (LAT). We clearly detect a source positionally coincident with the SNR. The source is extended with a best-fit extension of 0.55$^{\circ} \pm 0.04^{\circ}$ matching the size of the non-thermal X-ray and TeV gamma-ray emission from the remnant. The positional coincidence and the matching extended emission allows us to identify the LAT source with the supernova remnant RX J1713.7-3946....
Source: http://arxiv.org/abs/1103.5727v1
Arxiv.org
by A. A. Abdo; Fermi LAT Collaboration; M. Chernyakova; A. Neronov; E. Grundstrom; the Fermi Pulsar Timing Consortium
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We report on the discovery of \geq 100 MeV {\gamma} rays from the binary system PSR B1259-63/LS 2883 using the Large Area Telescope (LAT) on board Fermi. The system comprises a radio pulsar in orbit around a Be star. We report on LAT observations from near apastron to ~ 60 days after the time of periastron, tp, on 2010 December 15. No {\gamma}-ray emission was detected from this source when it was far from periastron. Faint {\gamma}-ray emission appeared as the pulsar approached periastron. At...
Source: http://arxiv.org/abs/1103.4108v3
Arxiv.org
by A. A. Abdo; K. S. Wood; M. E. DeCesar; F. Gargano; F. Giordano; P. S. Ray; D. Parent; A. K. Harding; M. Coleman Miller; D. L. Wood; M. T. Wolff
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One of the main results of the Fermi Gamma-Ray Space Telescope is the discovery of {\gamma}-ray selected pulsars. The high magnetic field pulsar, PSR J0007+7303 in CTA1, was the first ever to be discovered through its {\gamma}-ray pulsations. Based on analysis of 2 years of LAT survey data, we report on the discovery of {\gamma}-ray emission in the off-pulse phase interval at the ~ 6{\sigma} level. The flux from this emission in the energy range E \geq 100 MeV is F_100 =...
Source: http://arxiv.org/abs/1107.4151v1
Arxiv.org
by A. A. Abdo; M. Ackermann; M. Ajello; M. Axelsson; L. Baldini; J. Ballet; G. Barbiellini; D. Bastieri; B. M. Baughman; K. Bechtol; R. Bellazzini; B. Berenji; R. D. Blandford; E. D. Bloom; E. Bonamente; A. Borgland; J. Bregeon; A. Brez; M. Brigida; P. Bruel; T. H. Burnett; S. Buson; G. A. Caliandro; R. A. Cameron; P. A. Caraveo; J. M. Casandjian; E. Cavazzuti; C. Cecchi; O. Celik; E. Charles; S. Chaty; A. Chekhtman; J. Chiang; S. Ciprini; R. Claus; J. Cohen-Tanugi; S. Colafrancesco; L. R....
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(Abridged) We have conducted a detailed investigation of the broad-band spectral properties of the \gamma-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining our accurately estimated Fermi gamma-ray spectra with Swift, radio, infra-red, optical and other hard X-ray/gamma-ray data, collected within three months of the LBAS data taking period, we were able to assemble high-quality and quasi-simultaneous Spectral Energy Distributions (SED) for 48 LBAS blazars.The SED of...
Source: http://arxiv.org/abs/0912.2040v1
Arxiv.org
by A. A. Abdo; for the Fermi LAT collaboration
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The dramatic increase in the number of known gamma-ray pulsars since the launch of the Fermi Gamma-ray Space Telescope (formerly GLAST) offers the first opportunity to study a population of these high-energy objects. This catalog summarizes 46 high-confidence pulsed detections using the first six months of data taken by the Large Area Telescope (LAT), Fermi's main instrument. Sixteen previously unknown pulsars were discovered by searching for pulsed signals at the positions of bright gamma-ray...
Source: http://arxiv.org/abs/0910.1608v4
Arxiv.org
by A. A. Abdo; for the Fermi-LAT Collaboration
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We present the first catalog of active galactic nuclei (AGN) detected by the LAT, corresponding to 11 months of data collected in scientific operation mode. The First LAT AGN Catalog (1LAC) includes 671 gamma-ray sources located at high Galactic latitudes (|b| > 10 deg) that are detected with a test statistic (TS) greater than 25 and associated statistically with AGNs. Some LAT sources are associated with multiple AGNs, and consequently, the catalog includes 709 AGNs, comprising 300 BL...
Source: http://arxiv.org/abs/1002.0150v2
Arxiv.org
by A. A. Actor; K. D. Rothe; F. G. Scholtz
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We study at finite temperature the energy-momentum tensor $T_{\mu\nu}(x)$ of (i) a scalar field in arbitrary dimension, and (ii) a spinor field in 1+1 dimensions, interacting with a static background electromagnetic field. $T_{\mu\nu}$ separates into an UV divergent part $T_{\mu\nu}^{sea}$ representing the virtual sea, and an UV finite part $T_{\mu\nu}^{plasma}$ describing the thermal plasma of the matter field. $T_{\mu\nu}^{sea}$ remains uniform in the presence of a \underbar{uniform} electric...
Source: http://arxiv.org/abs/hep-th/9809030v1
Arxiv.org
by A. A. Aczel; E. Baggio-Saitovitch; S. L. Budko; P. C. Canfield; J. P. Carlo; G. F. Chen; Pengcheng Dai; T. Goko; W. Z. Hu; G. M. Luke; J. L. Luo; N. Ni; D. R. Sanchez-Candela; F. F. Tafti; N. L. Wang; T. J. Williams; W. Yu; Y. J. Uemura
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Zero-field (ZF) muon spin relaxation ($\mu$SR) measurements have revealed static commensurate magnetic order of Fe moments in NdOFeAs below $T_{N} \sim 135$ K, with the ordered moment size nearly equal to that in LaOFeAs, and confirmed similar behavior in BaFe$_{2}$As$_{2}$. In single crystals of superconducting (Ba$_{0.55}$K$_{0.45}$)Fe$_{2}$As$_{2}$, $\mu$SR spectra indicate static magnetism with incommensurate or short-ranged spin structure in $\sim$ 70 % of volume below $T_{N} \sim$ 80 K,...
Source: http://arxiv.org/abs/0807.1044v1
Arxiv.org
by A. A. Aczel; G. J. MacDougall; F. L. Ning; J. A. Rodriguez; S. R. Saha; F. C. Chou; T. Imai; G. M. Luke
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Impurity-induced magnetic order has been observed in many quasi-1D systems including doped variants of the spin-Peierls system CuGeO3. TiOCl is another quasi-1D quantum magnet with a spin-Peierls ground state, and the magnetic Ti sites of this system can be doped with non-magnetic Sc. To investigate the role of non-magnetic impurities in this system, we have performed both zero field and longitudinal field muSR experiments on polycrystalline Ti1-xScxOCl samples with x = 0, 0.01, and 0.03. We...
Source: http://arxiv.org/abs/1101.2654v1
Arxiv.org
by A. A. Aczel; L. Li; V. O. Garlea; J. -Q. Yan; F. Weickert; M. Jaime; B. Maiorov; R. Movshovich; L. Civale; V. Keppens; D. Mandrus
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The AR$_2$O$_4$ family (R = rare earth) have recently been attracting interest as a new series of frustrated magnets, with the magnetic R atoms forming zigzag chains running along the $c$-axis. We have investigated polycrystalline BaNd$_2$O$_4$ with a combination of magnetization, heat capacity, and neutron powder diffraction (NPD) measurements. Magnetic Bragg peaks are observed below $T_N$ $=$ 1.7 K, and they can be indexed with a propagation vector of $\vec{k}$ $=$ (0 1/2 1/2). The signal...
Topics: Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1407.4098
Arxiv.org
by A. A. Aczel; L. Li; V. O. Garlea; J. -Q. Yan; F. Weickert; V. S. Vapf; R. Movshovich; M. Jaime; P. J. Baker; V. Keppens; D. Mandrus
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We have investigated polycrystalline samples of the zigzag chain system BaTb$_2$O$_4$ with a combination of magnetic susceptibility, heat capacity, neutron powder diffraction, and muon spin relaxation measurements. Despite the onset of Tb$^{3+}$ short-range antiferromagnetic correlations at $|\theta_{CW}|$ $=$ 18.5 K and a very large effective moment, our combined measurements indicate that BaTb$_2$O$_4$ remains paramagnetic down to 0.095 K. The magnetic properties of this material show...
Topics: Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1502.05668
Arxiv.org
by A. A. Aczel; Y. Kohama; C. Marcenat; F. Weickert; O. E. Ayala-Valenzuela; M. Jaime; R. D. McDonald; S. D. Selesnic; H. A. Dabkowska; G. M. Luke
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Single crystals of the spin dimer system Sr3Cr2O8 have been grown for the first time. Magnetization, heat capacity, and magnetocaloric effect data up to 65 T reveal magnetic order between applied fields of Hc1 ~ 30.4 T and Hc2 ~ 62 T. This field-induced order persists up to ~ 8 K at H ~ 44 T, the highest observed in any quantum magnet where Hc2 is experimentally-accessible. We fit the temperature-field phase diagram boundary close to Hc1 using the expression Tc = A(H-Hc1)^v. The exponent v =...
Source: http://arxiv.org/abs/0908.3049v3
Arxiv.org
by A. A. Aguilar-Arevalo; B. Batell; R. Cooper; P. deNiverville; R. Dharmapalan; Z. Djurcic; R. Ford; F. G. Garcia; G. T. Garvey; J. Grange; S. Habib; W. Huelsnitz; C. Jiang; R. A. Johnson; W. Ketchum; T. Kobilarcik; W. C. Louis; W. Marsh; D. McKeen; G. B. Mills; J. Mirabal; C. D. Moore; P. Nienaber; Z. Pavlovic; D. Perevalov; C. C. Polly; M. Pospelov; H. Ray; A. Ritz; B. P. Roe; I. Stancu; R. Tayloe R. Van de Water; D. A. Wickremasinghe
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A proposal submitted to the FNAL PAC is described to search for light sub-GeV WIMP dark matter at MiniBooNE. The possibility to steer the beam past the target and into an absorber leads to a significant reduction in neutrino background, allowing for a sensitive search for elastic scattering of WIMPs off nucleons or electrons in the detector. Dark matter models involving a vector mediator can be probed in a parameter region consistent with the required thermal relic density, and which overlaps...
Source: http://arxiv.org/abs/1211.2258v1
Arxiv.org
by A. A. Aguilar-Arevalo; B. C. Brown; L. Bugel; G. Cheng; E. D. Church; J. M. Conrad; R. Dharmapalan; Z. Djurcic; D. A. Finley; R. Ford; F. G. Garcia; G. T. Garvey; J. Grange; W. Huelsnitz; C. Ignarra; R. Imlay; R. A. Johnson; G. Karagiorgi; T. Katori; T. Kobilarcik; W. C. Louis; C. Mariani; W. Marsh; G. B. Mills; J. Mirabal; C. D. Moore; J. Mousseau; P. Nienaber; B. Osmanov; Z. Pavlovic; D. Perevalov; C. C. Polly; H. Ray; B. P. Roe; A. D. Russell; M. H. Shaevitz; J. Spitz; I. Stancu; R. Tayloe;...
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The largest sample ever recorded of $\numub$ charged-current quasi-elastic (CCQE, $\numub + p \to \mup + n$) candidate events is used to produce the minimally model-dependent, flux-integrated double-differential cross section $\frac{d^{2}\sigma}{dT_\mu d\uz}$ for $\numub$ incident on mineral oil. This measurement exploits the unprecedented statistics of the MiniBooNE anti-neutrino mode sample and provides the most complete information of this process to date. Also given to facilitate historical...
Source: http://arxiv.org/abs/1301.7067v2
Arxiv.org
by A. A. Aguilar-Arevalo; B. C. Brown; L. Bugel; G. Cheng; E. D. Church; J. M. Conrad; R. Dharmapalan; Z. Djurcic; D. A. Finley; R. Ford; F. G. Garcia; G. T. Garvey; J. Grange; W. Huelsnitz; C. Ignarra; R. Imlay; R. A. Johnson; G. Karagiorgi; T. Katori; T. Kobilarcik; W. C. Louis; C. Mariani; W. Marsh; G. B. Mills; J. Mirabal; C. D. Moore; J. Mousseau; P. Nienaber; B. Osmanov; Z. Pavlovic; D. Perevalov; C. C. Polly; H. Ray; B. P. Roe; A. D. Russell; M. H. Shaevitz; J. Spitz; I. Stancu; R. Tayloe;...
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This paper explores the use of $L/E$ oscillation probability distributions to compare experimental measurements and to evaluate oscillation models. In this case, $L$ is the distance of neutrino travel and $E$ is a measure of the interacting neutrino's energy. While comparisons using allowed and excluded regions for oscillation model parameters are likely the only rigorous method for these comparisons, the $L/E$ distributions are shown to give qualitative information on the agreement of an...
Topics: High Energy Physics - Phenomenology, Nuclear Experiment, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1407.3304
Arxiv.org
by A. A. Aguilar-Arevalo; B. C. Brown; L. Bugel; R. Cooper; J. M. Conrad; R. Dharmapalan; R. Ford; Z. Djurcic; F. G. Garcia; G. T. Garvey; J. Grange; S. Habib; W. Huelsnitz; R. Imlay; C. Jiang; G. Karagiorgi; W. C. Louis; R. A. Johnson; W. Marsh; C. Mauger; G. B. Mills; C. D. Moore; J. Mousseau; P. Nienaber; B. Osmanov; Z. Pavlovic; D. Perevalov; C. C. Polly; H. Ray; B. P. Roe; M. H. Shaevitz; I. Stancu R. Tayloe; M. Tzanov; R. Van de Water; D. H. White; A. Wickremasinghe
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We propose adding 300 mg/l PPO to the existing MiniBooNE detector mineral oil to increase the scintillation response. This will allow the detection of associated neutrons and increase sensitivity to final-state nucleons in neutrino interactions. This increased capability will enable an independent test of whether the current excess seen in the MiniBooNE oscillation search is signal or background. In addition it will enable other neutrino interaction measurements to be made including a search...
Source: http://arxiv.org/abs/1210.2296v1
Arxiv.org
by A. A. Aguilar-Arevalo; C. E. Anderson; A. O. Bazarko; S. J. Brice; B. C. Brown; L. Buge; J. Cao; L. Coney; J. M. Conrad; D. C. Cox; A. Curioni; Z. Djurcic; D. A. Finley; B. T. Fleming; R. Ford; F. G. Garcia; G. T. Garvey; C. Green; J. A. Green; T. L. Hart; E. Hawker; R. Imlay; R. A. Johnson; G. Karagiorgi; P. Kasper; T. Katori; T. Kobilarcik; I. Kourbanis; S. Koutsoliotas; E. M. Laird; S. K. Linden; J. M. Link; Y. Liu; W. C. Louis; K. B. M. Mahn; W. Marsh; V. T. McGary; G. McGregor; W. Metcalf;...
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Using high statistics samples of charged current $\nu_\mu$ interactions, MiniBooNE reports a measurement of the single charged pion production to quasi-elastic cross section ratio on mineral oil (CH$_2$), both with and without corrections for hadron re-interactions in the target nucleus. The result is provided as a function of neutrino energy in the range 0.4 GeV $ < E_\nu
Source: http://arxiv.org/abs/0904.3159v1
Arxiv.org
by A. A. Aguilar-Arevalo; C. E. Anderson; A. O. Bazarko; S. J. Brice; B. C. Brown; L. Bugel; J. Cao; L. Coney; J. M. Conrad; D. C. Cox; A. Curioni; R. Dharmapalan; Z. Djurcic; D. A. Finley; B. T. Fleming; R. Ford; F. G. Garcia; G. T. Garvey; J. Grange; C. Green; J. A. Green; T. L. Hart; E. Hawker; R. Imlay; R. A. Johnson; G. Karagiorgi; P. Kasper; T. Katori; T. Kobilarcik; I. Kourbanis; S. Koutsoliotas; E. M. Laird; S. K. Linden; J. M. Link; Y. Liu; W. C. Louis; K. B. M. Mahn; W. Marsh; C. Mauger;...
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Using a high-statistics, high-purity sample of $\nu_\mu$-induced charged current, charged pion events in mineral oil (CH$_2$), MiniBooNE reports a collection of interaction cross sections for this process. This includes measurements of the CC$\pi^+$ cross section as a function of neutrino energy, as well as flux-averaged single- and double-differential cross sections of the energy and direction of both the final-state muon and pion. In addition, each of the single-differential cross sections...
Source: http://arxiv.org/abs/1011.3572v3
Arxiv.org
by A. A. Aguilar-Arevalo; C. E. Anderson; A. O. Bazarko; S. J. Brice; B. C. Brown; L. Bugel; J. Cao; L. Coney; J. M. Conrad; D. C. Cox; A. Curioni; R. Dharmapalan; Z. Djurcic; D. A. Finley; B. T. Fleming; R. Ford; F. G. Garcia; G. T. Garvey; J. Grange; C. Green; J. A. Green; T. L. Hart; E. Hawker; R. Imlay; R. A. Johnson; G. Karagiorgi; P. Kasper; T. Katori; T. Kobilarcik; I. Kourbanis; S. Koutsoliotas; E. M. Laird; S. K. Linden; J. M. Link; Y. Liu; W. C. Louis; K. B. M. Mahn; W. Marsh; C. Mauger;...
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Using a custom 3 \v{C}erenkov-ring fitter, we report cross sections for $\nu_\mu$-induced charged-current single $\pi^0$ production on mineral oil (\chtwo) from a sample of 5810 candidate events with 57% signal purity over an energy range of $0.5-2.0$GeV. This includes measurements of the absolute total cross section as a function of neutrino energy, and flux-averaged differential cross sections measured in terms of $Q^2$, $\mu^-$ kinematics, and $\pi^0$ kinematics. The sample yields a...
Source: http://arxiv.org/abs/1010.3264v4
Arxiv.org
by A. A. Aguilar-Arevalo; C. E. Anderson; S. J. Brice; B. C. Brown; L. Bugel; J. M. Conrad; R. Dharmapalan; Z. Djurcic; B. T. Fleming; R. Ford; F. G. Garcia; G. T. Garvey; J. Grange; J. A. Green; R. Imlay; R. A. Johnson; G. Karagiorgi; T. Katori; T. Kobilarcik; S. K. Linden; W. C. Louis; K. B. M. Mahn; W. Marsh; C. Mauger; W. Metcalf; G. B. Mills; J. Mirabal; C. D. Moore; J. Mousseau; R. H. Nelson; V. Nguyen; P. Nienaber; J. A. Nowak; B. Osmanov; A. Patch; Z. Pavlovic; D. Perevalov; C. C. Polly;...
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Two independent methods are employed to measure the neutrino flux of the anti-neutrino-mode beam observed by the MiniBooNE detector. The first method compares data to simulated event rates in a high purity $\numu$ induced charged-current single $\pip$ (CC1$\pip$) sample while the second exploits the difference between the angular distributions of muons created in $\numu$ and $\numub$ charged-current quasi-elastic (CCQE) interactions. The results from both analyses indicate the prediction of the...
Source: http://arxiv.org/abs/1102.1964v3
Arxiv.org
by A. A. Aligia; A. Anfossi; L. Arrachea; C. Degli Esposti Boschi; A. O. Dobry; C. Gazza; A. Montorsi; F. Ortolani; M. E. Torio
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We determine the quantum phase diagram of the one-dimensional Hubbard model with bond-charge interaction X in addition to the usual Coulomb repulsion U at half-filling. For large enough X and positive U the model shows three phases. For large U the system is in the spin-density wave phase already known in the usual Hubbard model. As U decreases, there is first a spin transition to a spontaneously dimerized bond-ordered wave phase and then a charge transition to a novel phase in which the...
Source: http://arxiv.org/abs/0704.0717v2
Arxiv.org
by A. A. Aligia; C. D. Batista; F. H. L. Essler
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We study two Heisenberg spin-1/2 chains coupled by a frustrating ``zigzag'' interaction. We are particularly interested in the regime of weak interchain coupling, which is difficult to analyse by either numerical or analytical methods. Previous density matrix renormalisation group (DMRG) studies of the isotropic model with open boundary conditions and sizeable interchain coupling have established the presence of incommensurate correlations and of a spectral gap. By using twisted boundary...
Source: http://arxiv.org/abs/cond-mat/0002318v1
Arxiv.org
by A. A. Alves Jr; L. Anderlini; M. Anelli; R. Antunes Nobrega; G. Auriemma; W. Baldini; G. Bencivenni; R. Berutti; A. Bizzeti; V. Bocci; N. Bondar; W. Bonivento; B. Botchin; S. Cadeddu; P. Campana; G. Carboni; A. Cardini; M. Carletti; P. Ciambrone; E. Dané S. De Capua; V. De Leo; C. Deplano; P. De Simone; F. Dettori; A. Falabella; F. Ferreira Rodriguez; M. Frosini; S. Furcas; E. Furfaro; G. Graziani; L. Gruber; G. Haefeli; A. Kashchuk; F. Iacoangeli; A. Lai; G. Lanfranchi; M. Lenzi; O....
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The performance of the LHCb Muon system and its stability across the full 2010 data taking with LHC running at ps = 7 TeV energy is studied. The optimization of the detector setting and the time calibration performed with the first collisions delivered by LHC is described. Particle rates, measured for the wide range of luminosities and beam operation conditions experienced during the run, are compared with the values expected from simulation. The space and time alignment of the detectors,...
Source: http://arxiv.org/abs/1211.1346v2
Arxiv.org
by A. A. Andrianov; D. Espriu; M. A. Kurkov; F. Lizzi
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Our understanding of quantum gravity suggests that at the Planck scale the usual geometry loses its meaning. If so, the quest for grand unification in a large non-abelian group naturally endowed with the property of asymptotic freedom may also lose its motivation. Instead we propose an unification of all fundamental interactions at the Planck scale in the form of a Universal Landau Pole (ULP), at which all gauge couplings diverge. The Higgs quartic coupling also diverges while the Yukawa...
Source: http://arxiv.org/abs/1302.4321v3
Arxiv.org
by A. A. Andrianov; F. Cannata
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Nonlinear (Polynomial, N-fold) SUSY approach to preparation of quantum systems with pre-planned spectral properties is reviewed. The full classification of ladder-reducible and irreducible chains of SUSY algebras in one-dimensional QM is given. Possible extensions of SUSY in one dimension are described. They include (no more than) ${\cal N} =2$ extended SUSY with two nilpotent SUSY charges which generate the hidden symmetry acting as a central charge. Embedding stationary quantum systems into a...
Source: http://arxiv.org/abs/hep-th/0407077v2
Arxiv.org
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We examine the completeness of bi-orthogonal sets of eigenfunctions for non-Hermitian Hamiltonians possessing a spectral singularity. The correct resolutions of identity are constructed for delta like and smooth potentials. Their form and the contribution of a spectral singularity depend on the class of functions employed for physical states. With this specification there is no obstruction to completeness originating from a spectral singularity.
Source: http://arxiv.org/abs/1002.0742v2
Arxiv.org
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We study complex potentials and related non-diagonalizable Hamiltonians with special emphasis on formal definitions of associated functions and Jordan cells. The nonlinear SUSY for complex potentials is considered and the theorems characterizing its structure are presented. We present the class of potentials invariant under SUSY transformations for non-diagonalizable Hamiltonians and formulate several results concerning the properties of associated functions . We comment on the applicability of...
Source: http://arxiv.org/abs/math-ph/0610024v3