Nonlinear dynamics of fermions during preheating - Archive ouverte HAL
Article Dans Une Revue Nuclear Physics A Année : 2009

Nonlinear dynamics of fermions during preheating

Résumé

We study the role of dynamical fermions during preheating after inflation. We compute the nonequilibrium dynamics of Dirac fermions coupled to a scalar (inflaton) field at next-to-next-to-leading order in a coupling expansion of the 2PI effective action. Besides the well-known parametric production of bosons and fermions and their back-reaction on the background inflaton field, this includes direct interactions between produced particles, which have been neglected in previous studies. We present preliminary numerical results in 3+1 dimensions which indicates that, for intermediate Yukawa couplings, the latter can dramatically affect the usual picture of preheating.

Dates et versions

hal-03732674 , version 1 (21-07-2022)

Identifiants

Citer

Alexandre Giraud, Julien Serreau. Nonlinear dynamics of fermions during preheating. Nuclear Physics A, 2009, 820, pp.215c-218c. ⟨10.1016/j.nuclphysa.2009.01.053⟩. ⟨hal-03732674⟩
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