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Dynamics of the cosmological relaxation after reheating

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Title
Dynamics of the cosmological relaxation after reheating
Author(s)
Kiwoon Choi; Hyungjin Kim; Toyokazu Sekiguchi
Publication Date
2017-04
Journal
PHYSICAL REVIEW D, v.95, no.7, pp.075008 -
Publisher
American Physical Society
Abstract
We examine if the cosmological relaxation mechanism, which was proposed recently as a new solution to the hierarchy problem, can be compatible with high reheating temperature well above the weak scale. As the barrier potential disappears at high temperature, the relaxion rolls down further after the reheating, which may ruin the successful implementation of the relaxation mechanism. It is noted that if the relaxion is coupled to a dark gauge boson, the new frictional force arising from dark gauge boson production can efficiently slow down the relaxion motion, which allows the relaxion to be stabilized after the electroweak phase transition for a wide range of model parameters, while satisfying the known observational constraints. © 2017 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/3717
DOI
10.1103/PhysRevD.95.075008
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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