Results 91 to 100 of about 1,963,432 (340)

Holographic entanglement entropy and complexity for the cosmological braneworld model

Journal of High Energy Physics
In a recent study [1], the time-dependent entanglement entropy of the universe undergoing expansion according to various power laws has been analyzed within the framework of the braneworld model. The results of the entanglement entropy in that paper take
Souvik Paul, Gopinath Guin, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

On the Galactic Center being the main source of galactic cosmic rays as evidenced by recent cosmic ray and gamma ray observations

New Journal of Physics, 2013
We revisit the idea that the Galactic Center (GC) is the dominant source of galactic cosmic rays (GCRs), based on a series of new observational evidence. A unified model is proposed to explain the new phenomena of GCRs and γ -rays simultaneously.
Yi-Qing Guo, Zhao-Yang Feng, Qiang Yuan, Cheng Liu, Hong-Bo Hu   +4 more
doaj   +1 more source

Inclusion of the excited states quark propagator to the nucleon electromagnetic form factors in the perturbative chiral quark model

Results in Physics, 2020
Electromagnetic form factors of the nucleon are studied within the framework of the Perturbative Chiral Quark Model (PCQM). In a previous analysis of the nucleon electromagnetic form factors, the quark propagator used in the calculation was truncated to ...
J. Jarassriwilai, K. Pumsa-ard, P. Uttayarat   +2 more
doaj   +1 more source

High energy cosmic-rays: puzzles, models, and giga-ton neutrino telescopes

, 2003
The existence of cosmic rays of energies exceeding 10^20 eV is one of the mysteries of high energy astrophysics. The spectrum and the high energy to which it extends rule out almost all suggested source models.
A Achterberg, A M Hillas, Arons, D Band, D Casper, D J Bird, D J Bird, E Boldt, E Waxman, E Waxman, E Waxman, E Waxman, E. Waxman, F Halzen, G L Fogli, G T Zatsepin, J Bednarz, J Bloom, J Hjorth, J N Bahcall, J N Bahcall, J N Bahcall, K Greisen, K Z Stanek, M Drees, M Milgrom, M Nagano, M Schmidt, M Vietri, N Hayashida, N N Efimov, P Bhattacharjee, P Mészáros, R Blandford, T Abu-Zayyad, T J Galama, T Piran, W I Axford, Y Fukuda   +38 more
core   +1 more source

Suprathermal Soliton Solutions to Nonlinear Schrödinger Equation

Contributions to Plasma Physics, EarlyView.
ABSTRACT Maxwell distributions are very difficult to find in the low‐pressure environment far away the Earth atmosphere, permeated by high temperatures, various types of radiation, highly energetic particles, space debris, and subjected to microgravity, presenting crucial challenges for spacecraft design and operations, and affecting astronaut's health.
F. E. M. Silveira, M. H. Benetti, I. L. Caldas   +2 more
wiley   +1 more source

Gauge interactions and the Galilean limit

European Physical Journal C: Particles and Fields
The gauge invariant minimal couplings for a class of relativistic free matter fields with global symmetry (related to usual charge conservation) have been obtained by incorporating an iterative Noether mechanism. Non-relativistic reduction of both matter
Ashis Saha, Rabin Banerjee, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

Generalized Chemical Model for Warm Dense Hydrogen: Ionization Potential Depression and Molecular Dissociation Shifts

Contributions to Plasma Physics, EarlyView.
ABSTRACT Warm dense matter (WDM) is a complex state, where quantum effects, thermal excitations, and strong interparticle correlations coexist. Understanding its microscopic composition and medium‐induced modifications of atomic and molecular properties is essential for planetary modeling, fusion research, and high‐energy‐density experiments.
L. T. Yerimbetova, Yu. V. Arkhipov, Ye. S. Mukhametkarimov, A. E. Davletov, I. M. Tkachenko   +4 more
wiley   +1 more source

High-Energy and Ultra-High-Energy Neutrino Astrophysics

Universe
The origin of high-energy cosmic rays, and their behavior in astrophysical sources, remains an open question. Recently, new ways to address this question have been made possible by the observation of a new astrophysical messenger, namely neutrinos.
Damiano F. G. Fiorillo
doaj   +1 more source

Discovery of VHE and HE emission from the blazar 1ES 0414+009 with H.E.S.S and Fermi-LAT

, 2011
The high energy peaked BL Lac (HBL) object 1ES 0414+009 (z=0.287) is a distant very high-energy (VHE, E > 100 GeV) blazars with well-determined redshift.
Ajello, M., Costamante, L., Fegan, S., Gérard, L., Hauser, M., Kaufmann, S., Ohm, S., Volpe, F.   +7 more
core   +1 more source

Quenching the Hubbard Model: Comparison of Nonequilibrium Green's Function Methods

Contributions to Plasma Physics, EarlyView.
ABSTRACT We benchmark nonequilibrium Green's function (NEGF) approaches for interaction quenches in the half‐filled Fermi–Hubbard model in one and two dimensions. We compare fully self‐consistent two‐time Kadanoff–Baym equations (KBE), the generalized Kadanoff–Baym ansatz (GKBA), and the recently developed NEGF‐based quantum fluctuations approach (NEGF‐
Jan‐Philip Joost, Christopher Makait, Alexander Osterkorn, Erik Schroedter   +3 more
wiley   +1 more source