Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-07-22
Phys.Rev. D66 (2002) 063001
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, accepted for publication in PRD
Scientific paper
10.1103/PhysRevD.66.063001
It has been suggested that the overdense region as a result of inhomogeneities in the early Universe would have undergone a collapse into the primordial black holes(PBH). In this work, we discuss a possible constraint on the PBH formation in the radiation dominated epoch by imposing the generalized second law of thermodynamics in the context of spherically collapsing scenario. It is found that both the critical temperature $T_c$ over which the formation of PBH is not possible and the lower bound on the mass of PBH depend on the number of degrees of freedom at the time of PBH formation. In the standard model, one can show that the lower bound on the mass of PBH known in the literature, of order Planck mass, is consistent with the thermodynamic constraint constructed in this work. We also pointed out the possibility that the critical temperature(lower bound on PBH mass) can be lowered(increased) provided the number of relativistic degrees of freedom of the Universe is increasing substantially beyond the standard model.
No associations
LandOfFree
Thermodynamic constraint on the primordial black hole formation in the radiation dominated epoch does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Thermodynamic constraint on the primordial black hole formation in the radiation dominated epoch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermodynamic constraint on the primordial black hole formation in the radiation dominated epoch will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-673111