IFIMAR   20926
INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
artículos
Título:
Supercooling and phase coexistence in cosmological phase Supercooling and phase coexistence in cosmological phase transitions
Autor/es:
A. MÉGEVAND; A. D. SÁNCHEZ
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Referencias:
Año: 2008 vol. 77 p. 635191 - 635191
ISSN:
0556-2821
Resumen:
Cosmological phase transitions are predicted by Particle Physics models, and have a variety of important cosmological consequences,which depend strongly on the dynamics of the transition. In this work we investigate in detail the general features of the development of a first-order phase transition.  We find thermodynamical constraints on some quantities that determine the dynamics, namely, the latent heat, the radiation energy density and the false-vacuum energy density. Using a simple model with a Higgs field, we study numerically the amount and duration of supercooling and the subsequent reheating and phase coexistence. We analyze the dependence of the dynamics on the different parameters of the model, namely, the energy scale, the number of degrees of freedom and the couplings of the scalar field with bosons and fermions. We also inspect the implications for the cosmological outcomes of the phase transition.
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