Results 11 to 20 of about 2,716,965 (190)
Universe 2024, 10(2), 68, 2021 We find that a big gap between indicators for the breaking strengths of the global chiral SU(2) and U(1) axial symmetries in QCD of the Standard Model (SM) can be interpreted as a new fine-tuning problem. This may thus imply calling for a class of Beyond the SM, which turns out to favor having a new chiral symmetry and the associated massless new quark
arxiv +1 more source
Constraints on Supersymmetry from Relic Density compared with future Higgs Searches at the LHC [PDF]
, 2010 Among the theories beyond the Standard Model (SM) of particle physics Supersymmetry (SUSY) provides an excellent dark matter (DM) candidate, the neutralino.
Akrami +47 more
core +2 more sources
Unification of the standard model and dark matter sectors in [SU(5) × U(1)]4
Journal of High Energy Physics, 2019 A simple model of dark matter contains a light Dirac field charged under a hidden U(1) gauge symmetry. When a chiral matter content in a strong dynamics satisfies the t’Hooft anomaly matching condition, a massless baryon is a natural candidate of the ...
Ayuki Kamada +2 more
doaj +1 more source
Neutrino Self-Interactions: A White Paper [PDF]
Physics of the Dark Universe Volume 42, December 2023, 101267, 2022 Neutrinos are the Standard Model (SM) particles which we understand the least, often due to how weakly they interact with the other SM particles. Beyond this, very little is known about interactions among the neutrinos, i.e., their self-interactions.
arxiv +1 more source
Light dark matter from inflaton decay
Journal of High Energy Physics, 2021 We propose a simple mechanism of light dark matter (DM) production from the decay of the oscillating inflaton condensation. If the reheating temperature after inflation is higher than the inflaton mass, which is of the same order of the momentum of the ...
Takeo Moroi, Wen Yin
doaj +1 more source
Cosmological relaxation from dark fermion production
Journal of High Energy Physics, 2020 We consider the cosmological relaxation solution to the electroweak hierarchy problem using the fermion production as a dominant friction force. In our approach, neither super-Planckian field excursions nor a large number of e-folds arise, and scanning ...
Kenji Kadota, Ui Min, Minho Son, Fang Ye
doaj +1 more source
Dark moments for the Standard Model?
Journal of High Energy Physics, 2021 If dark matter (DM) interacts with the Standard Model (SM) via the kinetic mixing (KM) portal, it necessitates the existence of portal matter (PM) particles which carry both dark and SM quantum numbers that will appear in vacuum polarization-like loop ...
Thomas G. Rizzo
doaj +1 more source
Noncommutative Spectral Geometry: A Short Review [PDF]
, 2013 We review the noncommutative spectral geometry, a gravitational model that combines noncommutative geometry with the spectral action principle, in an attempt to unify General Relativity and the Standard Model of electroweak and strong interactions ...
Sakellariadou, Mairi
core +2 more sources
Leptonic WIMP coannihilation and the current dark matter search strategy
Journal of High Energy Physics, 2018 We discuss the extent to which models of Weakly Interacting Massive Particle (WIMP) Dark Matter (DM) at and above the electroweak scale can be probed conclusively in future high energy and astroparticle physics experiments.
Michael J. Baker, Andrea Thamm
doaj +1 more source
Generalized blind spots for dark matter direct detection in the 2HDM
Journal of High Energy Physics, 2020 In this paper we study the presence of generalized blind spots, i.e. regions of the parameter space where the spin-independent cross section for dark matter direct detection is suppressed, in the context of a generic 2HDM and a minimal fermionic Higgs ...
M. E. Cabrera +3 more
doaj +1 more source