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Dark matter filtering-out effect during a first-order phase transition

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Title
Dark matter filtering-out effect during a first-order phase transition
Author(s)
Dongjin Chway; Tae Hyun Jung; Chang Sub Shin
Subject
GRAVITATIONAL-RADIATION
Publication Date
2020-05
Journal
PHYSICAL REVIEW D, v.101, no.9, pp.095019-1
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 authors. Published by the American Physical Society. If the mass of dark matter is generated from a cosmological phase transition involving the nucleation of bubbles, the corresponding bubble walls can filter out dark matter particles during the phase transition. Only particles with sufficient momentum to overcome their mass inside the bubbles can pass through the walls. As a result, the dark matter number density after the phase transition has a suppression factor exp(-Mχ/2γ&tild;T), where Mχ is the dark matter mass, and γ&tild; and T are the Lorentz factor and temperature of the incoming fluid in the bubble wall rest frame, respectively. Under certain assumptions, we show that the filtering-out process can naturally provide a large suppression consistent with the observed dark matter density for a wide range of dark matter masses up to the Planck scale. Since the first-order phase transition is the decisive ingredient in our mechanism, a new connection is made between heavy dark matter scenarios and gravitational wave observations
URI
https://pr.ibs.re.kr/handle/8788114/7860
DOI
10.1103/PhysRevD.101.095019
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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