Detonations and deflagrations in cosmological phase transitions

Details Detonations and deflagrations in cosmological phase transitions Detonations and deflagrations in cosmological phase transitions

2009-04-10

arxiv.org/abs/0904.1753v3

Nucl.Phys.B820:47-74,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

31 pages, 14 figures. v2: several clarifications added, a change of notation. v3: reference added. Version to appear in Nucl.

Scientific paper

10.1016/j.nuclphysb.2009.05.007

We study the steady state motion of bubble walls in cosmological phase transitions. Taking into account the boundary and continuity conditions for the fluid variables, we calculate numerically the wall velocity as a function of the nucleation temperature, the latent heat, and a friction parameter. We determine regions in the space of these parameters in which detonations and/or deflagrations are allowed. In order to apply the results to a physical case, we calculate these quantities in a specific model, which consists of an extension of the Standard Model with singlet scalar fields. We also obtain analytic approximations for the wall velocity, both in the case of deflagrations and of detonations.

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