120911592
The singularity states of the system of a charged fermion and a Dirac dyon
For the system of the fermion-Dirac dyon it is shown that the LWP difficulty exists also for the angular momentum states j ⩾ |q| + 12 when the charge Zd of the dyon exceeds some critical value Zdc. In order to avoid the LWP difficulty, the Kazama-Yang term and the term iKZZde2 γ·r2Mr3 should be considered simultaneously. The result shows that for all angular momentum states the radial wave functions of the fermion possess physically reasonable asymptotic behavior at the origin. The necessary condition for the bound states is qualitatively discussed, which shows that it is quite different for the dyon and the monopole.
121766040
Supermembrane monopole vacua
Abstract The supermembrane classical solutions with non-trivial circle bundles, i.e. supermembrane monopole vacua, are derived. The hamiltonian of the fermion fluctuations about the monopole vacuum configuration is weakly hermitian, in contrast with the same problem in QED. The electrically charged and dyon analogues to the monopole vacua are also discussed.
121291742
A six-dimensional cosmology solution with GUT and monopole-induced spontaneous compactification
In this paper, the authors present a cosmological solution of a six-dimensional Einstein-gauge unification theory to which is added a matter term. This exact solution appears that cosmology of the very early universe may differ considerably from the usually contemplated scenarios.
117665288
Instantons in grand unification
SummaryA class of instantons in four-dimensional Euclidean grand unification is discussed. These solutions in the classical limit have nonzero Lagrangian density at only one single point. These instantons can generate proton decay processes, whose rate has an extremely feeble effect in theSU5 model. However, it can be observable in unification with technifermions that embedded instantons induce technifermions decay to ordinary fermion. We also consider the instantons in aSO10 model.RiassuntoSi discute una classe di instantoni nella grande unificazione euclidea a quattro dimensioni. Queste soluzioni nel limite classico hanno densità lagrangiana non nulla solo in un singolo punto. Questi istantoni possono generare processi di decadimento protonico, il cui valore ha un effetto molto debole nel modelloSU5. Tuttavia, si può osservare che, nella unificazione con i tecnifermioni, gli istantoni inclusi inducono decadimenti dei tecnifermioni a fermioni ordinari. Si considerano anche gli istantoni in un modelloSO10.РезюмеОбсуждается класс инстантонов в четырехмерном эвклидовом великом объединении. Эти решения в классическом пределе имеют ненулевую плотность Лагранжиана только в одной изолированной точке. Эти инстантоны могут генерировать процессы распада протона. Интенсивность этих процессов представляет чрезвычайно малый эффект в моделиSU5. Однако, этот процесс может быть наблюдаем при объединении с технифермионом, когда внедренный инстантон индуцирует распад технифермионов в обыкновенные фермионы. Мы также рассматриваем инстантоны в моделиSO10.
120212512
The mass matrix of neutral fermions and application in some SUSY E6-GUT
The fermion mass spectrum remains one of the outstanding problems of grand unification. The authors discuss the mass matrix of neutral fermions, which arises in three SUSY E6-breaking patterns by including the contributions of the five-dimensional superpotential terms. The solar neutrino puzzle is solved in the breakdown through SU3C*SU3L*SU3R. The model is shown to lead naturally to large oscillations of the doublet neutrino into a sterile fermion leading to the possibility of substantial depletion of the solar electron neutrino flux.
124596353
DOES THE RUBAKOV EFFECT EXIST IN AN SU(2) MODEL
In an spontaneously broken gauge theory with a Higgs triplet, the mass effect of an isospin 1/2 fermion on the fermion-monopole bound states is discussed. It is shown that when the direct coupling between fermion and Higgs field approaches zero, but the Dirac mass remains finiteness, the necessary condition of the fermion-monopole bound state cannot be satisfied. This result means that the Rubakov effect is absent for monopole because of the Dirac mass.
35621082
Local unitary classification of arbitrary dimensional multipartite pure states.
We propose a practical entanglement classification scheme for general multipartite pure states in arbitrary dimensions under local unitary equivalence by exploiting the high order singular value decomposition technique and local symmetries of the states. By virtue of this scheme, the method of determining the local unitary equivalence of n-qubit states proposed by Kraus is extended to the case for arbitrary dimensional multipartite states.
118432739
An inflationary scenario taking into account of possible dark energy effects in the early universe
We investigate the possible effect of cosmological-constant type dark energy during the inflation period of the early universe. This is accommodated by a new dispersion relation in de Sitter space. The modified inflation model of a minimally coupled scalar field is still able to yield an observation-compatible scale-invariant primordial spectrum, simultaneously having the potential to generate a spectrum with lower power at large scales. A qualitative match to the WMAP 7-year data is presented. We obtain an ΩΛ of the same order of that in the Λ-CDM model. Possible relations between the de Sitter scenario and Doubly Special Relativity (DSR) are also discussed.
117323209
Search for GRB counterparts using the ARGO‐YBJ experiment in shower mode
In this paper, the effective area of the ARGO‐YBJ experiment to detect the gamma rays with energy range from 10 GeV to 1 TeV for different incident zenith angles (0,10,20,30,40 degrees) is given respectively. The optimal event selections to search for GRB counterparts with different cutoff energy models (Ecut = 100 GeV and 1 TeV) are studied. Using these selections and their corresponding angular resolutions the searches are done within two hours around the GRB trigger time via different time windows. Finally, the result for the 20 GRBs in the field of view of ARGO between July 2006 and July 2008 is presented, and the fluence upper limit for each GRB is set at 99% confidence level.
120176772
Design of the local trigger board for the Daya Bay reactor neutrino experiment
We have designed a local trigger board for the Daya Bay reactor neutrino experiment, which is aimed to measure the neutrino mixing angle sin(2) 2 theta(13) with a precision down to 1% level. The local trigger board processes both the total number of coincident photomultiplier tube (PMT) hits and the PMT energy sum to make trigger decisions. With this design, a high trigger probability is achieved to meet the system requirement. The design of the local trigger board is presented. (C) 2011 Elsevier B.V. All rights reserved.
145047134
Finslerian MOND vs . observations of Bullet Cluster 1 E 0657-558
It is known that theory of MOND with spherical symmetry cannot account for the convergence κ-map of Bullet Cluster 1E0657-558. In this paper, we try to set up a Finslerian MOND, a generalization of MOND in Finsler spacetime. We use Ric = 0 to obtain the gravitational vacuum field equation in a four-dimensional Finsler spacetime. To leading order in the post-Newtonian approximation, we obtain the explicit form of the Finslerian line element. It is simply the Schwarzschild’s metric except for the Finslerian rescaling coefficient f(v) of the radial coordinate r, i.e. R = f(v(r))r. By setting f(v(r)) = (1 − √ a0r/GM) , we obtain the famous MOND in a Finslerian framework. Taking a dipole and a quadrupole term into consideration, we give the convergence κ in gravitational lensing astrophysics in our model. Numerical analysis shows that our prediction is to a certain extent in agreement with the observations of Bullet Cluster 1E0657-558. With the theoretical temperature T taking the observed value 14.8 keV, the mass density profile of the main cluster obtained in our model is the same order as that given by the best-fit King β-model.