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Title: Gravitational waves from domain walls in the next-to-minimal supersymmetric standard model

Abstract

The next-to-minimal supersymmetric standard model predicts the formation of domain walls due to the spontaneous breaking of the discrete Z{sub 3}-symmetry at the electroweak phase transition, and they collapse before the epoch of big bang nucleosynthesis if there exists a small bias term in the potential which explicitly breaks the discrete symmetry. Signatures of gravitational waves produced from these unstable domain walls are estimated and their parameter dependence is investigated. It is shown that the amplitude of gravitational waves becomes generically large in the decoupling limit, and that their frequency is low enough to be probed in future pulsar timing observations.

Authors:
 [1];  [2];  [3];  [4]
  1. Center for Theoretical Physics of the Universe, Institute for Basic Science,Daejeon 305-811 (Korea, Republic of)
  2. Institute for Cosmic Ray Research, The University of Tokyo,5-1-5 Kashiwa-no-ha, Kashiwa City, Chiba 277-8582 (Japan)
  3. (WPI),Todai Institutes for Advanced Study, The University of Tokyo,5-1-5 Kashiwa-no-ha, Kashiwa City, Chiba 277-8582 (Japan)
  4. Department of Physics, Tokyo Institute of Technology,2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 (Japan)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22458394
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 10; Other Information: PUBLISHER-ID: JCAP10(2015)041; OAI: oai:repo.scoap3.org:12313; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; COSMOLOGY; GRAVITATIONAL WAVES; NUCLEOSYNTHESIS; PHASE TRANSFORMATIONS; PULSARS; STANDARD MODEL; SUPERSYMMETRY

Citation Formats

Kadota, Kenji, Kawasaki, Masahiro, Kavli Institute for the Physics and Mathematics of the Universe, and Saikawa, Ken’ichi. Gravitational waves from domain walls in the next-to-minimal supersymmetric standard model. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/10/041.
Kadota, Kenji, Kawasaki, Masahiro, Kavli Institute for the Physics and Mathematics of the Universe, & Saikawa, Ken’ichi. Gravitational waves from domain walls in the next-to-minimal supersymmetric standard model. United States. doi:10.1088/1475-7516/2015/10/041.
Kadota, Kenji, Kawasaki, Masahiro, Kavli Institute for the Physics and Mathematics of the Universe, and Saikawa, Ken’ichi. 2015. "Gravitational waves from domain walls in the next-to-minimal supersymmetric standard model". United States. doi:10.1088/1475-7516/2015/10/041.
@article{osti_22458394,
title = {Gravitational waves from domain walls in the next-to-minimal supersymmetric standard model},
author = {Kadota, Kenji and Kawasaki, Masahiro and Kavli Institute for the Physics and Mathematics of the Universe and Saikawa, Ken’ichi},
abstractNote = {The next-to-minimal supersymmetric standard model predicts the formation of domain walls due to the spontaneous breaking of the discrete Z{sub 3}-symmetry at the electroweak phase transition, and they collapse before the epoch of big bang nucleosynthesis if there exists a small bias term in the potential which explicitly breaks the discrete symmetry. Signatures of gravitational waves produced from these unstable domain walls are estimated and their parameter dependence is investigated. It is shown that the amplitude of gravitational waves becomes generically large in the decoupling limit, and that their frequency is low enough to be probed in future pulsar timing observations.},
doi = {10.1088/1475-7516/2015/10/041},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 10,
volume = 2015,
place = {United States},
year = 2015,
month =
}
  • The next-to-minimal supersymmetric standard model predicts the formation of domain walls due to the spontaneous breaking of the discrete Z{sub 3}-symmetry at the electroweak phase transition, and they collapse before the epoch of big bang nucleosynthesis if there exists a small bias term in the potential which explicitly breaks the discrete symmetry. Signatures of gravitational waves produced from these unstable domain walls are estimated and their parameter dependence is investigated. It is shown that the amplitude of gravitational waves becomes generically large in the decoupling limit, and that their frequency is low enough to be probed in future pulsar timingmore » observations.« less
  • Cited by 5
  • In the next-to-minimal supersymmetric standard model (NMSSM), the presence of light pseudoscalars can have a dramatic effect on the decays of the standard model-like Higgs boson. These pseudoscalars are naturally light if supersymmetry breaking preserves an approximate U(1){sub R} symmetry, spontaneously broken when the Higgs bosons take on their expectation values. We investigate two classes of theories that possess such an approximate U(1){sub R} at the mediation scale: modifications of gauge and gaugino mediation. In the models we consider, we find two disjoint classes of phenomenologically allowed parameter regions. One of these regions corresponds to a limit where the singletmore » of the NMSSM largely decouples. The other can give rise to a standard model-like Higgs boson with dominant branching into light pseudoscalars.« less
  • We present a benchmark in the parameter space of the next-to-minimal supersymmetric standard model (NMSSM) that provides for a dramatic multilepton signal and no jets containing 5 or more leptons resulting from the cascade decays of the third lightest neutralino, {chi}{sub 3}{sup 0}, and the lightest chargino, {chi}{sub 1}{sup {+-}}, via light charged sleptons. This is a very clean signal with almost no standard model (SM) background. In some cases, a total signal of {>=}3 leptons+0 jets can be detected at the 5{sigma} level at the LHC running at {radical}(s)=7 TeV with approximately 3 fb{sup -1} of data and withmore » less than 1 fb{sup -1} when running at {radical}(s)=14 TeV. In addition, kinematic edges in the invariant mass distributions of 2, 3, and 4 leptons are easily detectable with large integrated luminosities ({approx}600 fb{sup -1}) which can lead to simple measurements of the mass differences of heavy particles in the decay chains, including all combinations of the three lightest neutralinos.« less
  • We study the implications of the triviality problem for the Higgs boson masses and other relevant parameters in the next to minimal supersymmetric standard model (NMSSM). By means of triviality, a new way to constrain parameters is proposed, and therefore we are able to derive triviality bounds on the heaviest-Higgs-boson mass, the lightest-Higgs-boson mass, the soft SUSY-breaking parameters, and the vacuum expectation value of the Higgs gauge singlet through a thorough examination of the parameter space. The triviality upper bound on the lightest-Higgs-boson mass predicted by the NMSSM is indeed larger than the upper bound predicted by the minimal supersymmetricmore » standard model.« less