Results 61 to 70 of about 2,521 (215)
Spontaneous baryogenesis without baryon isocurvature [PDF]
, 2017 We propose a new class of spontaneous baryogenesis models that does not produce baryon isocurvature perturbations. The baryon chemical potential in these models is independent of the field value of the baryon-generating scalar, hence the scalar field ...
Kobayashi, T. +5 more
core +1 more source
Electroweak Phase Transitions in Einstein’s Static Universe
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 We suggest using Einstein’s static universe metric for the metastable state after reheating, instead of the Friedman‐Robertson‐Walker spacetime. In this case, strong static gravitational potential leads to the effective reduction of the Higgs vacuum expectation value, which is found to be compatible with the Standard Model first‐order electroweak phase
M. Gogberashvili, Marek Szydlowski
wiley +1 more source
GalaxiesWe propose that modifications to the Higgs potential within a narrow atmospheric layer near the event horizon of an astrophysical black hole could significantly enhance the rate of sphaleron transitions, as well as transform the Chern–Simons number into ...
Merab Gogberashvili +1 more
doaj +1 more source
Gravitational baryogenesis in DGP brane cosmology
European Physical Journal C: Particles and Fields, 2018 We consider the imbalance of matter and antimatter by using a gravitational baryogenesis mechanism in the background of Dvali–Gabadadze–Porrati (DGP) brane cosmology.
K. Atazadeh
doaj +1 more source
Ultra-relativistic bubbles from the simplest Higgs portal and their cosmological consequences
Journal of High Energy Physics, 2022 We analyze phase transitions in the minimal extension of the SM with a real singlet scalar field. The novelty of our study is that we identify and analyze in detail the region of parameter space where the first order phase transition can occur and in ...
Aleksandr Azatov +4 more
doaj +1 more source
Complementary Probes of the Dimension‐6 Operator via Gravitational Waves and Multi‐Higgs Production
Advances in High Energy Physics, Volume 2026, Issue 1, 2026.We investigate the phenomenological consequences of a dimension‐6 operator H†H3/Λ2, Λ is the effective scale at which new physics takes over, which modifies the scalar potential of the standard model and can induce a strong first‐order electroweak phase transition (SFOEWPT). We estimate the lower limit on the effective scale Λ to be 515 GeV from the di‐
Dilruba Gazi +4 more
wiley +1 more source
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 Neutrino physics is a mature branch of science with all the three neutrino mixing angles and two mass squared differences determined with high precision. In spite of several experimental verifications of neutrino oscillations and precise measurements of two mass squared differences and the three mixing angles, the unitarity of the leptonic mixing ...
Gayatri Ghosh +2 more
wiley +1 more source
Phase transitions and baryogenesis from decays
Journal of High Energy Physics, 2017 We study scenarios in which the baryon asymmetry is generated from the decay of a particle whose mass originates from the spontaneous breakdown of a symmetry.
Brian Shuve, Carlos Tamarit
doaj +1 more source
Two Micron‐Size Dark Dimensions
Fortschritte der Physik, Volume 73, Issue 8, August 2025.Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui +2 more
wiley +1 more source
The Discreet Charm of Higgsino Dark Matter: A Pocket Review
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 We give a brief review of the current constraints and prospects for detection of higgsino dark matter in low‐scale supersymmetry. In the first part we argue, after performing a survey of all potential dark matter particles in the MSSM, that the (nearly) pure higgsino is the only candidate emerging virtually unscathed from the wealth of observational ...
Kamila Kowalska +2 more
wiley +1 more source