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70
Sep 18, 2013
09/13
by
Eric S. Perlman; Andrew S. Wilson
texts
eye 70
favorite 0
comment 0
We use Chandra, HST and VLA observations of M87 to investigate the physics of X-ray emission from AGN jets. We find that X-ray hotspots in the M87 jet occur primarily in regions with hard optical-to-X-ray spectra and lower than average polarization. Particle injection appears to be required both continuously in the jet sheath as well as locally at X-ray hotspots.
Source: http://arxiv.org/abs/astro-ph/0212381v1
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44
Sep 18, 2013
09/13
by
Panayiotis Tzanavaris; Robert F. Carswell
texts
eye 44
favorite 0
comment 0
A new analysis of Keck/HIRES observations of the broad absorption line QSO APM 0827+5255 indicates that a number of intervening C IV absorbers give rise to absorption lines for which the observed optical depths for 1548, 1550 A doublet components are not in the expected 2:1 ratio. To compensate for the effect, a local adjustment of the zero-level is required. We model this effect as coverage of one line of sight to this gravitationally lensed QSO and perform a set of simulations to select a...
Source: http://arxiv.org/abs/astro-ph/0212393v1
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26
Oct 30, 2009
10/09
by
Jacques Descloitres, MODIS Rapid Response Team, NASA/GSFC
image
eye 26
favorite 0
comment 0
Widespread burning is underway in West and Central Africa as Africa’s continental-scale burning patterns shift from south of the equator to north. The burning season peaks in southern Africa in late summer or early fall, only to begin building in the areas between the southern edge of the Sahara and the equator. The peak of the burning season in this region occurs in late winter or early spring. These true-color images were captured by the <a HREF="http://terra.nasa.gov/"...
Topics: What -- Terra, What -- Aqua
Source: http://visibleearth.nasa.gov/view_rec.php?id=4829
Topics: kbs_vod, sat, news_vod
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37
Sep 18, 2013
09/13
by
Takahiro Miura; Tetsuo Shindou; Eiichi Takasugi
texts
eye 37
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We considered a model where |V_{13}|=0 so that delta=0 at M_R and analyzed mixing angles and CP violation angles at the low energy scale by using the renormalization group in the MSSM model. In this model, parameters at M_R scale are two mixing angles (theta_{12} and theta_{23}), three neutrino masses, and two Majorana phases. We found that (1) sin^2 2 theta_{12} at the low energy scale must be less than that at $M_R$ scale, (2) the induced |V_{13}| can be as large as 0.05 if masses of...
Source: http://arxiv.org/abs/hep-ph/0212239v1
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44
Sep 18, 2013
09/13
by
Wojciech Florek
texts
eye 44
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The group-theoretical classification of states of identical particle pairs is presented. Then obtained states are coupled with those of an antiparticle to construct states of a three-particle system. Investigations are performed using products of irreducible projective representations of the 2D translation group. For a given BvK period N degeneracy of pair states is N, whereas three-particle states are N^2-fold degenerated. It has to be underlined that the case of even N is more complicated...
Source: http://arxiv.org/abs/cond-mat/0212396v1
Special Meeting
Topics: Fort Wayne, Local Government, City Council
Internet Civil Defense (ICD) is designed to substantially enhance national preparedness and response to both terrorism and natural disasters. ICD is a national (and ultimately, international) system of information sharing, education and analysis via the Internet to connect the general public, community networks, emergency responders, local and national investigative authorities, and scientific experts and public health officials around the globe in real time for the common purpose of increasing...
Topics: DTIC Archive, LaPorte, Ron, DEFENSE ADVANCED RESEARCH PROJECTS AGENCY ARLINGTON VA, *CIVIL DEFENSE,...
This project investigated a novel variation on the concept of a tuned vibration absorber or damper: the State-Switched Absorber (SSA). The SSA is capable of altering its stiffness state nearly instantaneously. The change in stiffness causes a change in the resonance frequencies of the system thereby instantaneously retuning the SSA to a new frequency. The state-switching technique increases the effective bandwidth of the absorber can be made to be effective against multiple frequencies within...
Topics: DTIC Archive, Cunefare, Kenneth A, GEORGIA INST OF TECH ATLANTA SCHOOL OFMECHANICAL ENGINEERING,...
Topics: Exhibition, Cleveland Museum of Art, Press Releases
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45
Sep 18, 2013
09/13
by
Vladimir K. Petrov
texts
eye 45
favorite 0
comment 0
Transition from discrete to continuous Fourier series is studied for the functions becoming singular in the transition. Conditions are specified when summing replacement by integration is inadmissible.
Source: http://arxiv.org/abs/hep-lat/0212028v1
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54
Sep 18, 2013
09/13
by
Vladimir Savinov; Romeo Ahohe; CLEO Collaboration
texts
eye 54
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We analyzed 13.8 fb^{-1} of the integrated e+e- luminosity collected at 10.6 GeV center-of-mass energy with the CLEO II and II.V detectors to study exclusive two-photon production of single hadronic resonances. We searched for hadrons decaying into Ks K pi when both leptons remain undetected. In this analysis we studied the detection efficiency and evaluated systematic errors using independent data samples. We estimated 90% CL upper limits on the products of the two-photon partial widths of...
Source: http://arxiv.org/abs/hep-ex/0212046v1
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61
Sep 18, 2013
09/13
by
J. A. Aguilar-Saavedra; B. M. Nobre
texts
eye 61
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Top flavour-changing neutral decays are extremely suppressed within the Standard Model (SM) by the GIM mechanism, but can reach observable rates in some of its extensions. We compute the branching ratios for t -> c gamma and t -> c g in minimal SM extensions where the addition of a vector-like up or down quark singlet breaks the unitarity of the 3 x 3 Cabibbo-Kobayashi-Maskawa (CKM) matrix. The maximum rates obtained indicate to what extent present experimental data allow 3 x 3 CKM...
Source: http://arxiv.org/abs/hep-ph/0210360v2
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51
Sep 18, 2013
09/13
by
Markus Deserno; Thomas Bickel
texts
eye 51
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We theoretically study the elastic deformation of a fluid membrane induced by an adhering spherical colloidal particle within the framework of a Helfrich energy. Based on a full optimization of the membrane shape we find a continuous binding and a discontinuous envelopment transition, the latter displaying a potentially substantial energy barrier. A small gradient approximation permits membrane shape and complex energy to be calculated analytically. While this only leads to a good...
Source: http://arxiv.org/abs/cond-mat/0212421v1
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Sep 18, 2013
09/13
by
F. J. Herrera-Govantes; M. A. Olalla Acosta; J. L. Vicente-Cordoba
texts
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This paper deals with valuations of fields of formal meromorphic functions and their residue fields. We explicitly describe the residue fields of the monomial valuations. We also classify all the discrete rank one valuations of fields of power series in two and three variables, according to their residue fields. We prove that all our cases are possible and give explicit constructions.
Source: http://arxiv.org/abs/math/0212203v2
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54
Sep 18, 2013
09/13
by
Jeeva Anandan
texts
eye 54
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An experiment that shows the modulation of the Aharonov-Bohm oscillations of magneto-resistance in a mesoscopic ring is described. Possible theoretical explanations of this modulation due to the interaction of the electron spin with the magnetic and electric fields are considered.
Source: http://arxiv.org/abs/quant-ph/0212102v1
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49
Sep 18, 2013
09/13
by
L. Turban
texts
eye 49
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The crossing probability in the time direction is defined for an off-equilibrium reaction-diffusion system as the probability that the system of size L is still active at time t, in the finite-size scaling limit. Exact results are obtained for the diffusion-limited coalescence problem in 1+1 dimensions with periodic and free boundary conditions using empty interval methods. The crossing probability is a scale-invariant universal function of an effective aspect ratio, L^2/Dt, which is the...
Source: http://arxiv.org/abs/cond-mat/0212407v1
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62
Sep 18, 2013
09/13
by
Yu. Kagan; L. A. Maksimov
texts
eye 62
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We analyze the damping of the transverse breathing mode in an elongated trap at ultralow temperatures. The damping occurs due to the parametric resonance entailing the energy transfer to the longitudinal degrees of freedom. It is found that the nonlinear coupling between the transverse and discrete longitudinal modes can result in an anomalous behavior of the damping as a function of time with the partially reversed pumping of the breathing mode. The picture revealed explains the results...
Source: http://arxiv.org/abs/cond-mat/0212377v2
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49
Sep 18, 2013
09/13
by
R. H. Bernstein
texts
eye 49
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This article studies the potential of combining charged-current disappearance measurements of \nu_{\mu} to \nu_{\tau} from MINOS and an off-axis beam. I find that the error on \Delta m^2 from a 100 kt-yr off-axis measurement is a few percent of itself. Further, I find little improvement to an off-axis measurement by combining it with MINOS.
Source: http://arxiv.org/abs/hep-ex/0212042v1
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Sep 18, 2013
09/13
by
Thomas C. Hales
texts
eye 61
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This article shows that under general conditions, p-adic orbital integrals of definable functions are represented by virtual Chow motives. This gives an explicit example of the philosophy of Denef and Loeser, which predicts that all naturally occurring p-adic integrals are motivic.
Source: http://arxiv.org/abs/math/0212236v1
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Sep 18, 2013
09/13
by
Saharon Shelah; Juris Stepráns
texts
eye 52
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The maximality of Abelian subgroups play a role in various parts of group theory. For example, Mycielski has extended a classical result of Lie groups and shown that a maximal Abelian subgroup of a compact connected group is connected and, furthermore, all the maximal Abelian subgroups are conjugate. For finite symmetric groups the question of the size of maximal Abelian subgroups has been examined by Burns and Goldsmith in 1989 and Winkler in 1993. We show that there is not much interest in...
Source: http://arxiv.org/abs/math/0212233v1
4,376
4.4K
Apr 21, 2020
04/20
by
Hit Entertainment
movies
eye 4,376
favorite 17
comment 0
Angelina celebrates friendships both onstage and off in this treasured collection of stories about the charming mouseling who lives in Chipping Cheddar. Angelina learns life lessons about giving, jealousy and friendship - realizing that true friends are friends forever. Two "Little Stars" live-action segments help beginning ballerinas feel more comfortable about their first ballet class and offer a glimpse of the imaginative world of dancing in character. Episodes Featured: 1. The...
Topics: Angelina Ballerina, Barney, Kipper, Bob the Builder, PBS Kids Sprout, VHS, Hit Entertainment
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50
Sep 18, 2013
09/13
by
L. Deharveng; A. Zavagno; L. Salas; A. Porras; J. Caplan; I. Cruz-Gonzalez
texts
eye 50
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The HII regions Sh 217 and Sh 219 are textbook examples of a Stromgren sphere surrounded by an annular photodissociation region (PDR). The annular PDR is observed in both the 21 cm atomic hydrogen emission and the dust (PAH) emission near 8 micron (MSX Survey). An ultracompact radio continuum source is observed in the direction of the annular PDR, in both Sh 217 and Sh 219. JHKobservations show the presence of highly reddened stellar clusters (AV ~ 20 mag) in the directions of these radio...
Source: http://arxiv.org/abs/astro-ph/0212383v1
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51
Sep 18, 2013
09/13
by
Frederic Zagury
texts
eye 51
favorite 0
comment 0
When a star is observed behind an interstellar cloud of sufficient column density, we do not observe the direct light from the star, which is totally extinguished. Rather, we see only starlight scattered at small angles from the star. I use several papers published in New Astronomy to recount the different steps which permit understanding how, and under which conditions, scattered starlight can be more important than direct starlight in the spectrum of a reddened star. Associated problems -the...
Source: http://arxiv.org/abs/astro-ph/0212373v1
Weekly Weather and Crop Bulletin 2002-12-17: Volume 89 , Issue 51. Digitized from IA1632333-05 . Previous issue: sim_weekly-weather-and-crop-bulletin_2002-12-10_89_50 . Next issue: sim_weekly-weather-and-crop-bulletin_2002-12-24_89_52 .
Topics: Agriculture, Government Documents, microfilm
Source: IA1632333-05
Mixtape of rap by Supersessio DJ's, circulating in the Finnish underground electronic music forums. This was recorded in 2002 from a radio show on Radio Mafia.
Topics: supersessio, mixtape, radio show, finnish, rap
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51
Sep 19, 2013
09/13
by
Carsten Henkel; Peter Kr"uger; Ron Folman; J"org Schmiedmayer
texts
eye 51
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The limitations for the coherent manipulation of neutral atoms with fabricated solid state devices, so-called `atom chips', are addressed. Specifically, we examine the dominant decoherence mechanism, which is due to the magnetic noise originating from the surface of the atom chip. It is shown that the contribution of fluctuations in the chip wires at the shot noise level is not negligible. We estimate the coherence times and discuss ways to increase them. Our main conclusion is that future...
Source: http://arxiv.org/abs/quant-ph/0208165v2
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58
Sep 22, 2013
09/13
by
Lisa Borland
texts
eye 58
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Option pricing formulas are derived from a non-Gaussian model of stock returns. Fluctuations are assumed to evolve according to a nonlinear Fokker-Planck equation which maximizes the Tsallis nonextensive entropy of index $q$. A generalized form of the Black-Scholes differential equation is found, and we derive a martingale measure which leads to closed form solutions for European call options. The standard Black-Scholes pricing equations are recovered as a special case ($q = 1$). The...
Source: http://arxiv.org/abs/cond-mat/0205078v3
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48
Sep 18, 2013
09/13
by
I. M. Hook; P. A. Shaver; C. A. Jackson; J. V. Wall; K. I. Kellermann
texts
eye 48
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We present optical spectra and redshift measurements for 178 flat-spectrum objects from the Parkes quarter-Jansky flat-spectrum sample. These spectra were obtained in order to compile a complete sample of quasars for use in a study of quasar evolution. We present a composite optical spectrum made from the subset of 109 quasars that have flux densities in the range 0.25Jy < S(2.7GHz) < 0.5Jy, and make a comparison with a composite for radio-quiet QSOs from the Large Bright Quasar Survey....
Source: http://arxiv.org/abs/astro-ph/0212386v1
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60
Sep 18, 2013
09/13
by
H. -Th. Janka; R. Buras; K. Kifonidis; M. Rampp; T. Plewa
texts
eye 60
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One of the central problems in supernova theory is the question how massive stars explode. Understanding the physical processes that drive the explosion is crucial for linking the stellar progenitors to the final remnants and for predicting observable properties like explosion energies, neutron star and black hole masses, nucleosynthetic yields, explosion anisotropies, and pulsar kicks. Here we review different suggestions for the explosion mechanism and discuss the constraints that can or...
Source: http://arxiv.org/abs/astro-ph/0212314v2
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63
Sep 18, 2013
09/13
by
K. Kampf; M. Knecht; J. Novotny
texts
eye 63
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A calculation of the Dalitz decay in next-to-leading order in chiral perturbation theory of two flavour case extended by virtual photons is presented. The whole kinematic sector is covered and realistic experimental situation is discussed.
Source: http://arxiv.org/abs/hep-ph/0212243v1
This paper addresses how rereading can improve comprehension of second language college texts, describing a pilot study that examined what happens when people reread. The study involved two female Japanese college students enrolled in a U.S. university. The women were asked to do think-aloud protocols while individually reading a section of an introductory linguistics textbook for non-specialists. They were permitted to think aloud in English or Japanese, ask questions, and use a dictionary....
Topics: ERIC Archive, College Students, English (Second Language), Higher Education, Japanese, Protocol...
This is a New Zealand classification of Dangerous Seduction . Title Dangerous Seduction Publication number 201753 Application number 20100800 Medium Video Recording VHS/PAL Current decision R16 Objectionable except if the availability of the publication is restricted to persons who have attained the age of 16 years. Descriptive note Violence and sex scenes Associated documents 24020_18_4_30795.pdf (Register Page) Registration date 2002-12-17 Language English Country United States Related...
Topics: New Zealand, censorship
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38
Oct 30, 2009
10/09
by
Image courtesy of Hal Pierce. More images collected by the TRMM satellite may be found at the website trmm.gsfc.nasa.gov.
image
eye 38
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This image shows rainfall accumulation over California and Oregon's Coastal Ranges from December 14 through 17. The area has been battered by a series of North Pacific storms called extratropical lows. Several lives have been lost as a consequence of flooding rains, high winds and significant snow accumulations. The Guadalupe and Napa Rivers in California have overflowed their banks and wind gusts in the 50-80 mph range have occurred. The rain image, based on data from NASA's Tropical Rainfall...
Topics: What -- Tropical Rainfall Measuring Mission (TRMM), Where -- California
Source: http://visibleearth.nasa.gov/view_rec.php?id=4338
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43
Sep 22, 2013
09/13
by
Masahide Yamaguchi; Jun'ichi Yokoyama
texts
eye 43
favorite 0
comment 0
We establish a method to trace the Lagrangian evolution of extended objects consisting of a multicomponent scalar field in terms of a numerical calculation of field equations in three dimensional Eulerian meshes. We apply our method to the cosmological evolution of global strings and evaluate the energy density, peculiar velocity, Lorentz factor, formation rate of loops, and emission rate of Nambu-Goldstone (NG) bosons. We confirm the scaling behavior with a number of long strings per horizon...
Source: http://arxiv.org/abs/hep-ph/0205308v2
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45
Sep 18, 2013
09/13
by
Romeel Davé; Neal Katz; David H. Weinberg
texts
eye 45
favorite 0
comment 0
Lyman alpha absorber correlations contain information about the underlying density distribution associated with a particular class of absorbers. As such, they provide an opportunity to independently measure the "bias" of the Lyman alpha forest, i.e. the relationship between HI column density and underlying dark matter density. In these proceedings we use hydrodynamic simulations to investigate whether the evolution of this bias is measurable from observable correlations....
Source: http://arxiv.org/abs/astro-ph/0212395v1
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48
Sep 18, 2013
09/13
by
Frederic Zagury
texts
eye 48
favorite 0
comment 0
In this paper I review a series of observations which do not agree with the standard interpretation of the extinction curve. The consequence is that light we receive from a reddened star must be contaminated by starlight scattered at very small angular distances from the star. The true extinction curve is a straight line from the near infrared to the far-UV. If so, all interstellar grains models must be questionned. Another conclusion concerns the average properties of interstellar grains which...
Source: http://arxiv.org/abs/astro-ph/0212372v1
8
8.0
Apr 25, 2022
04/22
by
KBS
movies
eye 8
favorite 0
comment 0
Topics: kbsvod, sat, realtalk
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283
audio
eye 283
favorite 0
comment 0
* Headlines for Tuesday, December 17th, 2002 * Tentative Agreement Averts Transit Strike By Workers From Nation's Largest Public Transportation System * Is Cross-Burning Constitutionally Protected Speech, Or Racial Intimidation and Hatred? * "The International Poindextering of Poindexter": Electronic Activists Publish the Total Information Awareness Director's Home Phone Number and Satellite Photos of His House
Topic: Democracy Now
Source: Radio/Television broadcast
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50
Sep 18, 2013
09/13
by
A. E. Dorokhov
texts
eye 50
favorite 0
comment 0
Instanton liquid model being effective model of the QCD vacuum describes well the hadrons at low as well at intermediate energies. Thus, contact with perturbative QCD results is possible providing the unique information about the quark-gluon distribution functions in the QCD vacuum and hadrons at low energy normalization point. As an illustrative example we consider the pion transition form factor for the process $\gamma ^*\gamma^*\to \pi^0$ at space-like values of photon momenta. The leading...
Source: http://arxiv.org/abs/hep-ph/0212252v1
This is a New Zealand classification of Sex Around The World: Czech Republic Of Love . Title Sex Around The World: Czech Republic Of Love Other known titles Sex Around The World: Czech Republic, Sex Around The World Publication number 201845 Application number 20100848 Medium DVD Current decision R18 Objectionable except if the availability of the publication is restricted to persons who have attained the age of 18 years. Descriptive note Explicit sex scenes Associated documents...
Topics: New Zealand, censorship
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35
Oct 30, 2009
10/09
by
Jacques Descloitres, MODIS RapidResponse Team, NASA/GSFC
image
eye 35
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comment 0
A streak ofsnow left by a large snow system cuts horizontally across the eastern United Statesin this true-color Aqua MODIS image from December 6, 2002. From left to right, thesnow streaks across southern Kansas and northern Oklahoma, southern Missouri andnorthern Arkansas, southern Illinois, southern Indiana, Kentucky, and southernOhio. Another streak of snow runs from northern Ohio into Michigan, northernIndiana, northern Illinois, Wisconsin, and eastern Minnesota.The southern end of Lake...
Topics: What -- Aqua, Where -- United States of America, Where -- Kansas, Where -- Oklahoma, Where --...
Source: http://visibleearth.nasa.gov/view_rec.php?id=4371
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56
Sep 18, 2013
09/13
by
J. P. Huang; L. Gao; K. W. Yu
texts
eye 56
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comment 0
When a sinusoidal (ac) field is applied to a suspension containing nonlinear dielectric particles, the electrical response will generally consist of ac fields at frequencies of the higher-order harmonics. The situation is further complicated by an intrinsic dielectric dispersion which often occurs due to the surface conductivity or inhomogeneous structure of the particles. We perform a perturbation method to investigate the effect of intrinsic dielectric dispersion on the harmonics of local...
Source: http://arxiv.org/abs/cond-mat/0212213v2
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51
Sep 18, 2013
09/13
by
W. C. Barber; F. Ye; D. P. Belanger; J. A. Fernandez-Baca
texts
eye 51
favorite 0
comment 0
Neutron scattering experiments at the magnetic vacancy percolation threshold concentration, x_v, using the random-field Ising crystal Fe(0.76)Zn(0.24)F2, show stability of the transition to long-range order up to fields H=6.5 T. The observation of the stable long-range order corroborates the sharp boundary observed in computer simulations at x_v separating equilibrium critical scattering behavior at high magnetic concentration from low concentration hysteretic behavior. Low temperature H>0...
Source: http://arxiv.org/abs/cond-mat/0212428v1
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58
Sep 18, 2013
09/13
by
Zhao Z. Z. Wang; Denis Jerome; Jean Christophe Girard; Claude Pasquier; Klaus Bechgaard
texts
eye 58
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comment 0
Charge density waves (CDW) have been studied at the surface of a cleaved TTF-TCNQ single crystal using a low temperature scanning tunneling microscope (STM) under ultra high vacuum (UHV) conditions. All CDW phase transitions of TTF-TCNQ have been identified. The measurement of the modulation wave vector along the a direction provides the first evidence for the existence of domains comprising single plane wave modulated structures in the temperature regime where the transverse wave vector of the...
Source: http://arxiv.org/abs/cond-mat/0212418v1
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47
Sep 18, 2013
09/13
by
Remo Ruffini; Luca Vitagliano
texts
eye 47
favorite 0
comment 0
The mass--energy formula of black holes implies that up to 50% of the energy can be extracted from a static black hole. Such a result is reexamined using the recently established analytic formulas for the collapse of a shell and expression for the irreducible mass of a static black hole. It is shown that the efficiency of energy extraction process during the formation of the black hole is linked in an essential way to the gravitational binding energy, the formation of the horizon and the...
Source: http://arxiv.org/abs/astro-ph/0212376v1
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51
Sep 19, 2013
09/13
by
L. Feher; I. Marshall
texts
eye 51
favorite 0
comment 0
We derive a generalization of the classical dynamical Yang-Baxter equation (CDYBE) on a self-dual Lie algebra $\cal G$ by replacing the cotangent bundle T^*G in a geometric interpretation of this equation by its Poisson-Lie (PL) analogue associated with a factorizable constant r-matrix on $\cal G$. The resulting PL-CDYBE, with variables in the Lie group G equipped with the Semenov-Tian-Shansky Poisson bracket based on the constant r-matrix, coincides with an equation that appeared in an earlier...
Source: http://arxiv.org/abs/math/0208159v3
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52
Sep 19, 2013
09/13
by
Atanas Iliev; Kristian Ranestad
texts
eye 52
favorite 0
comment 0
The geometry of Sp(3)/U(3) as a subvariety of Gr(3,6) is explored to explain several examples given by Mukai of non-abelian Brill-Noether loci, and to give some new examples. These examples identify Brill-Noether loci of vector bundles on linear sections of the Lagrangian Grassmannian Sp(3)/U(3) with orthogonal linear sections of the dual variety and vice versa. A main technical result of independent interest is the fact that any nodal hyperplane section of the Lagrangian Grassmannian projected...
Source: http://arxiv.org/abs/math/0209169v2
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39
Sep 18, 2013
09/13
by
Stefan Forste
texts
eye 39
favorite 0
comment 0
In this talk we discuss symmetry preserving D-branes on a line of a marginally deformed SU(2) WZW model. A semiclassical and a quantum theoretical approach are presented.
Source: http://arxiv.org/abs/hep-th/0212199v1
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55
Sep 18, 2013
09/13
by
K. S. Babu; Ilia Gogoladze; Kai Wang
texts
eye 55
favorite 0
comment 0
In the minimal supersymmetric Standard Model with seesaw neutrino masses we show how R-parity can emerge naturally as a discrete gauge symmetry. The same discrete symmetry explains the smallness of the \mu-term (the Higgsino mass parameter) via the Giudice--Masiero mechanism. The discrete gauge anomalies are cancelled by a discrete version of the Green--Schwarz mechanism. The simplest symmetry group is found to be Z_4 with a charge assignment that is compatible with grand unification. Several...
Source: http://arxiv.org/abs/hep-ph/0212245v1
