The Experts below are selected from a list of 5025 Experts worldwide ranked by ideXlab platform
Hao Guo - One of the best experts on this subject based on the ideXlab platform.
-
thermostatistics of a q deformed relativistic ideal fermi gas
Journal of Statistical Mechanics: Theory and Experiment, 2020Co-Authors: Xuyang Hou, H Yan, Hao GuoAbstract:In this paper, we formulate a q-deformed many-body theory for relativistic Fermi gas and discuss the effects of the deformation parameter q on physical properties of such systems. Since antiparticle excitations appear in the relativistic regime, a suitable treatment to the choice of deformation parameters for both fermions and antifermions must be carefully taken in order to get a consistent theory. By applying this formulation, we further study the thermostatistic properties of a q-deformed ideal relativistic Fermi gas. It can be shown that even in the noninteracting scenario, the system exhibits interesting characteristics which are significantly different from ordinary Fermi gases. Explicitly, Antiparticles may become dominant due to the shift of chemical potential by the deformation parameter q. This may build a solid foundation for further studies of q-deformed relativistic interacting systems. We also apply our model to study the electron gas in a white dwarf. The effect of the deformation parameter on the Chandrasekhar limit is discussed.
-
thermostatistics of a q deformed relativistic ideal fermi gas
arXiv: High Energy Physics - Theory, 2020Co-Authors: Xuyang Hou, H Yan, Hao GuoAbstract:In this paper, we formulate a q-deformed many-body theory for the relativistic Fermi gas and discuss the effects of the deformation parameter q on physical properties of such systems. Since antiparticle excitations appear in the relativistic regime, a suitable treatment to the choice of deformation parameters for both fermions and antifermions must be carefully taken in order to get a consistent theory. By applying this formulation, we further study the thermostatistic properties of a q-deformed ideal relativistic Fermi gas. It can be shown that even in the noninteracting scenario, the system exhibits interesting characteristics which are significantly different from ordinary Fermi gases. Explicitly, Antiparticles may become dominant due to the shift of chemical potential by the deformation parameter q. This may build a solid foundation for the further studies of q-deformed relativistic interacting systems.
H Stocker - One of the best experts on this subject based on the ideXlab platform.
-
production of light nuclei hypernuclei and their Antiparticles in relativistic nuclear collisions
Physics Letters B, 2011Co-Authors: A Andronic, P Braunmunzinger, J Stachel, H StockerAbstract:We present, using the statistical model, an analysis of the production of light nuclei, hypernuclei and their Antiparticles in central collisions of heavy nuclei. Based on these studies we provide predictions for the production yields of multiply-strange light nuclei.
-
production of pentaquark states in pp collisions within the microcanonical ensemble
Physics Letters B, 2004Co-Authors: H Stocker, K WernerAbstract:Abstract The microcanonical statistical approach is applied to study the production of pentaquark states in pp collisions. We predict the average multiplicity and the average transverse momentum of Θ + ( 1540 ) and Ξ ( 1860 ) and their Antiparticles at different energies.
Xuyang Hou - One of the best experts on this subject based on the ideXlab platform.
-
thermostatistics of a q deformed relativistic ideal fermi gas
Journal of Statistical Mechanics: Theory and Experiment, 2020Co-Authors: Xuyang Hou, H Yan, Hao GuoAbstract:In this paper, we formulate a q-deformed many-body theory for relativistic Fermi gas and discuss the effects of the deformation parameter q on physical properties of such systems. Since antiparticle excitations appear in the relativistic regime, a suitable treatment to the choice of deformation parameters for both fermions and antifermions must be carefully taken in order to get a consistent theory. By applying this formulation, we further study the thermostatistic properties of a q-deformed ideal relativistic Fermi gas. It can be shown that even in the noninteracting scenario, the system exhibits interesting characteristics which are significantly different from ordinary Fermi gases. Explicitly, Antiparticles may become dominant due to the shift of chemical potential by the deformation parameter q. This may build a solid foundation for further studies of q-deformed relativistic interacting systems. We also apply our model to study the electron gas in a white dwarf. The effect of the deformation parameter on the Chandrasekhar limit is discussed.
-
thermostatistics of a q deformed relativistic ideal fermi gas
arXiv: High Energy Physics - Theory, 2020Co-Authors: Xuyang Hou, H Yan, Hao GuoAbstract:In this paper, we formulate a q-deformed many-body theory for the relativistic Fermi gas and discuss the effects of the deformation parameter q on physical properties of such systems. Since antiparticle excitations appear in the relativistic regime, a suitable treatment to the choice of deformation parameters for both fermions and antifermions must be carefully taken in order to get a consistent theory. By applying this formulation, we further study the thermostatistic properties of a q-deformed ideal relativistic Fermi gas. It can be shown that even in the noninteracting scenario, the system exhibits interesting characteristics which are significantly different from ordinary Fermi gases. Explicitly, Antiparticles may become dominant due to the shift of chemical potential by the deformation parameter q. This may build a solid foundation for the further studies of q-deformed relativistic interacting systems.
N S Meshalkina - One of the best experts on this subject based on the ideXlab platform.
-
microwave signature of relativistic positrons in solar flares
Publications of the Astronomical Society of Japan, 2013Co-Authors: Gregory D Fleishman, Alexander T Altyntsev, N S MeshalkinaAbstract:Relativistic Antiparticles can be created in high-energy nuclear interactions; thus, the detection of Antiparticles in an astrophysical source can tell us something remarkable about the underlying high-energy processes and nuclear interactions. However, once created, the Antiparticles remain a minor fraction of their conjugant normal particles, so the detection of the Antiparticles represents a big science challenge. To address this challenge we employ the imaging and polarimetry of microwave radiation produced as the positrons gyrate in the ambient magnetic field. The key property of the radiation used in this method is that the oppositely charged particles, electrons and positrons, produce radiation with opposite helicity, easily distinguishable by currently operating radio facilities. Analysis of available spatially resolved microwave data augmented by independent magnetic field measurements allows us to remotely detect the relativistic positron component in several solar flares.
-
microwave signature of relativistic positrons in solar flares
arXiv: Solar and Stellar Astrophysics, 2013Co-Authors: Gregory D Fleishman, Alexander T Altyntsev, N S MeshalkinaAbstract:Relativistic Antiparticles can be created in high-energy nuclear interactions; thus, detection of Antiparticles in an astrophysical source can tell us something remarkable about the underlying high-energy processes and nuclear interactions. However, once created, the Antiparticles remain a minor fraction of their conjugant normal particles, so the detection of the Antiparticles represents a big science challenge. To address this challenge we employ imaging and polarimetry of microwave radiation produced as the positrons gyrate in the ambient magnetic field. The key property of the radiation used in this method is that the oppositely charged particles, electrons and positrons, produce radiation with opposite helicity, easily distinguishable by currently operating radio facilities. Analysis of available spatially resolved microwave data augmented by independent magnetic field measurements allows us to remotely detect the relativistic positron component in several solar flares.
Jie Feng - One of the best experts on this subject based on the ideXlab platform.
-
dark matter search in space combined analysis of cosmic ray antiproton to proton flux ratio and positron flux measured by ams 02
The Astrophysical Journal, 2018Co-Authors: Jie Feng, Honghao ZhangAbstract:Dark matter searches in space have been carried out for many years. Measurements of cosmic-ray (CR) photons, charged Antiparticles, and neutrinos are useful tools for dark matter indirect searches. The antiparticle energy spectra of CRs have several exciting features, such as the unexpected positron excess at E ~ 10–500 GeV and the remarkably flattening antiproton/proton at E ~ 60–450 GeV precisely measured by the AMS-02 experiment, which cannot be explained simultaneously by secondary production in the interstellar medium. In this work, we report a combined analysis of CR antiproton and positron spectra arising from dark matter on the top of a secondary production in a spatial-dependent propagation model. We discuss the systematic uncertainties from the antiproton production cross section using the two latest Monte Carlo generators, i.e., EPOS LHC and QGSJET-II-04m. We compare their results. In the case of EPOS LHC, we find that the dark matter pair annihilating into τ leptons channel with a 100% branching ratio and the p-wave annihilation cross section assumption is the only possible one-channel scenario to explain the data. On the other hand, there is not a single possible channel in the case of QGSJET-II-04m. We also propose possible two-channel scenarios based on these two Monte Carlo generators.
-
dark matter search in space combined analysis of cosmic ray antiproton to proton flux ratio and positron flux measured by ams 02
arXiv: High Energy Physics - Phenomenology, 2017Co-Authors: Jie Feng, Honghao ZhangAbstract:Dark matter search in space has been carried out for many years. Measurements of cosmic ray photons, charged Antiparticles and neutrinos are useful tools for dark matter indirect search. The antiparticle energy spectra of cosmic rays have several exciting features such as the unexpected positron excess at energy about 10 -- 500 GeV and the remarkably flattening antiproton/proton at energy about 60--450 GeV precisely measured by the AMS-02 experiment, which can not be explained simultaneously by secondary production in interstellar medium. In this work, we report a combined analysis of cosmic ray antiproton and positron spectra arising from dark matter on the top of a secondary production in a spatial-dependent propagation model. We discuss the systematics from antiproton production cross section using the two latest Monte Carlo generators, i.e. EPOS LHC and QGSJET-II-04m, respectively. We compare their results. In the case of EPOS LHC, we find that the dark matter pair annihilating into tau leptons channel with 100% branching ratio is the only possible one channel scenario to explain data. On the other hand, there is not a single possible channel in the case of QGSJET-II-04m. We also propose possible two-channel scenarios based on these two Monte Carlo generators.