Gravitational waves from domain walls and their implications

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, nam...

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Main Authors: Kazunori Nakayama, Fuminobu Takahashi, Norimi Yokozaki
Format: Article
Language:English
Published: Elsevier 2017-07-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S037026931730360X
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spelling doaj-17a9d20420f146a4a455da6cb114530a2020-11-24T22:48:57ZengElsevierPhysics Letters B0370-26931873-24452017-07-01770C50050610.1016/j.physletb.2017.05.010Gravitational waves from domain walls and their implicationsKazunori Nakayama0Fuminobu Takahashi1Norimi Yokozaki2Department of Physics, Faculty of Science, The University of Tokyo, Bunkyo-ku, Tokyo 133-0033, JapanDepartment of Physics, Tohoku University, Sendai, Miyagi 980-8578, JapanDepartment of Physics, Tohoku University, Sendai, Miyagi 980-8578, JapanWe 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 (O5). 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.http://www.sciencedirect.com/science/article/pii/S037026931730360X
collection DOAJ
language English
format Article
sources DOAJ
author Kazunori Nakayama
Fuminobu Takahashi
Norimi Yokozaki
spellingShingle Kazunori Nakayama
Fuminobu Takahashi
Norimi Yokozaki
Gravitational waves from domain walls and their implications
Physics Letters B
author_facet Kazunori Nakayama
Fuminobu Takahashi
Norimi Yokozaki
author_sort Kazunori Nakayama
title Gravitational waves from domain walls and their implications
title_short Gravitational waves from domain walls and their implications
title_full Gravitational waves from domain walls and their implications
title_fullStr Gravitational waves from domain walls and their implications
title_full_unstemmed Gravitational waves from domain walls and their implications
title_sort gravitational waves from domain walls and their implications
publisher Elsevier
series Physics Letters B
issn 0370-2693
1873-2445
publishDate 2017-07-01
description 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 (O5). 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.
url http://www.sciencedirect.com/science/article/pii/S037026931730360X
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AT fuminobutakahashi gravitationalwavesfromdomainwallsandtheirimplications
AT norimiyokozaki gravitationalwavesfromdomainwallsandtheirimplications
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