Quasi-thermal Universe and its implications for gravitino production, baryogenesis and dark matter
| dc.creator | Allahverdi, Rouzbeh | |
| dc.creator | Mazumdar, Anupam | |
| dc.date | 2005-05-06 | |
| dc.date | 2006-12-20 | |
| dc.date.accessioned | 2026-07-07T07:41:28Z | |
| dc.date.available | 2026-07-07T07:41:28Z | |
| dc.description | Under general circumstances full thermal equilibrium may not be established for a long period after perturbative or non-perturbative decay of the inflaton has completed. One can instead have a distribution of particles which is in kinetic equilibrium and evolves adiabatically during this period. Number-violating reactions which are required to establish chemical equilibrium can become efficient only at much later times. We highlight some of the striking consequences of such a quasi-thermal Universe. In particular, thermal gravitino production yields {\it no bound} on the maximum temperature of the primordial thermal bath alone. As another consequence, the lower bound on the mass of the lightest right-handed (s)neutrino from thermal leptogenesis can be $\gg 10^{9}$ GeV. Depending on the phase, a Wino or Higgsino considerably lighter than TeV, or a Bino in the bulk region, can be a viable {\it thermal} dark matter candidate. Finally the electroweak symmetry may never be restored in the early Universe, therefore weakening any hopes of realizing a successful electroweak baryogenesis. | |
| dc.description | Title changed. Upon requests the role of SUSY flat directions in thermalization is emphasized. Minor changes and added comments for better clarification. 5 revtex pages | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0505050 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0505050 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/122118 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Quasi-thermal Universe and its implications for gravitino production, baryogenesis and dark matter | |
| dc.type | text |