Fate of oscillating homogeneous ℤ2-symmetric scalar condensates in the early Universe
Wen-Yuan Ai,
Zi-Liang Wang
Abstract:Dark matter, if represented by a ℤ2-symmetric scalar field, can manifest as
both particles and condensates. In this paper, we study the evolution of an oscillating
homogeneous condensate of a ℤ2-symmetric scalar field in a thermal plasma in an FLRW
universe. We focus on the perturbative regime where the oscillation amplitude is sufficiently
small so that parametric resonance is inefficient. This perturbative regime necessarily comprises
the late stage of the condensate decay and determines its fate. … Show more
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