Gravitational waves from domain walls and their implications

被引：27

作者：

Nakayama, Kazunori ^{[1
,2
]}

Takahashi, Fuminobu ^{[2
,3
]}

Yokozaki, Norimi ^{[3
]}

机构：

[1] Univ Tokyo, Fac Sci, Dept Phys, Bunkyo Ku, Tokyo 1330033, Japan

[2] Univ Tokyo, UTIAS, Kavli IPMU WPI, Kashiwa, Chiba 2778583, Japan

[3] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICS LETTERS B | 2017年 / 770卷

关键词：

SPONTANEOUS BARYOGENESIS; BREAKING; VACUUM;

D O I：

10.1016/j.physletb.2017.05.010

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We evaluate the impact of domain-wall annihilation on the currently ongoing and planned gravitational wave experiments, including a case in which domain walls experience a frictional force due to interactions with the ambient plasma. We show the sensitivity reach in terms of physical parameters, namely, the wall tension and the annihilation temperature. We find that a Higgs portal scalar, which stabilizes the Higgs potential at high energy scales, can form domain walls whose annihilation produces a large amount of gravitational waves within the reach of the advanced LIGO experiment (05). Domain wall annihilation can also generate baryon asymmetry if the scalar is coupled to either SU(2)(L) gauge fields or the (B - L) current. This is a variant of spontaneous baryogenesis, but it naturally avoids the isocurvature constraint due to the scaling behavior of the domain-wall evolution. We delineate the parameter space where the domain-wall baryogenesis works successfully and discuss its implications for the gravitational wave experiments. (C) 2017 The Author(s). Published by Elsevier B.V.

引用

页码：500 / 506

页数：7

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