Bounds on very low reheating scenarios after Planck
Abstract
We consider the case of very low reheating scenarios [TRH∼O (MeV ) ] with a better calculation of the production of the relic neutrino background (with three-flavor oscillations). At 95% confidence level, a lower bound on the reheating temperature TRH>4.1 MeV is obtained from big bang nucleosynthesis, while TRH>4.7 MeV from Planck data (allowing neutrino masses to vary), the most stringent bound on the reheating temperature to date. Neutrino masses as large as 1 eV are possible for very low reheating temperatures.
- Publication:
-
Physical Review D
- Pub Date:
- December 2015
- DOI:
- 10.1103/PhysRevD.92.123534
- arXiv:
- arXiv:1511.00672
- Bibcode:
- 2015PhRvD..92l3534D
- Keywords:
-
- 98.80.Ft;
- 26.35.+c;
- 98.70.Vc;
- 98.80.Cq;
- Origin formation and abundances of the elements;
- Big Bang nucleosynthesis;
- Background radiations;
- Particle-theory and field-theory models of the early Universe;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- High Energy Physics - Phenomenology
- E-Print:
- 9 pages, 9 figures