Results 11 to 20 of about 2,554 (118)
Journal of High Energy Physics, 2017 We consider two theoretical scenarios, each including a ℤ 2-odd sector and leading to an elementary dark matter candidate. The first one is a variant of the Type-III seesaw model where one lepton triplet is ℤ 2-odd, together with a heavy sterile neutrino.
Avirup Ghosh +2 more
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Acceleration of particles by acceleration horizons [PDF]
Physical Review D, 2013 30 pages. Presentation improved and expanded, Sec. VI and VII and Appendix added. Matches version accepted in PRD.
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Particle acceleration in binaries [PDF]
EPJ Web of Conferences, 2017 Cygnus X-3 massive binary system is one of the powerful sources of radio and X-ray emission consisting of an accreting compact object, probably a black hole, with a Wolf-Rayet star companion. Based on the detections of ultra high energy gamma-rays by Kiel and Havera Park, Cygnus X-3 has been proposed to be one of the most powerful sources of charged ...
V. Y. Sinitsyna, V. G. Sinitsyna
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Extended scalar sectors, effective operators and observed data
Journal of High Energy Physics, 2018 The available data on the 125 GeV scalar h is analysed to explore the room for new physics in the electroweak symmetry breaking sector. The first part of the study is model-independent, with h couplings to standard model particles scaled by quantities ...
Atri Dey +2 more
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Complex Langevin analysis of 2D U(1) gauge theory on a torus with a θ term
Journal of High Energy Physics, 2020 Monte Carlo simulation of gauge theories with a θ term is known to be extremely difficult due to the sign problem. Recently there has been major progress in solving this problem based on the idea of complexifying dynamical variables. Here we consider the
Mitsuaki Hirasawa +3 more
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Particle Acceleration Mechanisms
Space Science Reviews, 2008 We review the possible mechanisms for production of non-thermal electrons which are responsible for non-thermal radiation in clusters of galaxies. Our primary focus is on non-thermal Bremsstrahlung and inverse Compton scattering, that produce hard X-ray emission.
Andrei M. Bykov, Vahé Petrosian
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Journal of High Energy Physics, 2019 Though the 125-GeV scalar, as the Higgs boson of the standard model, is disfavoured as a dark matter portal by direct searches and the observations on relic density, a heavier scalar in an extended electroweak sector can fit into that role.
Atri Dey +2 more
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Particle Acceleration Mechanisms [PDF]
International Astronomical Union Colloquium, 1994 AbstractHigh-energy particle acceleration is observed to proceed in a diverse variety of astrophysical sites ranging from the terrestrial aurorae to the most distant quasars. Particle acceleration is a fairly common channel for the release of large-scale kinetic, rotational, and magnetic energy.
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Present Status of KEK Isotope Separation System
EPJ Web of Conferences, 2014 KISS (KEK Isotope Separation System) has been constructed at Nishina Re-search Center (NRC) of RIKEN to study the decay properties of heavy neutron-rich iso-topes with mass number around A∼200 along the neutron magic number of N = 126 for the ...
Hirayama Y. +13 more
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Particle Acceleration in Relativistic Outflows [PDF]
Space Science Reviews, 2012 In this review we confront the current theoretical understanding of particle acceleration at relativistic outflows with recent observational results on various source classes thought to involve such outflows, e.g. gamma-ray bursts, active galactic nuclei, and pulsar wind nebulae.
Bykov, Andrei +5 more
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