Enabling electroweak baryogenesis through dark matter
Abstract
We study the impact on electroweak baryogenesis from a swifter cosmological expansion induced by dark matter. We detail the experimental bounds that one can place on models that realize it, and we investigate the modifications of these bounds that result from a nonstandard cosmological history. The modifications can be sizeable if the expansion rate of the Universe increases by several orders of magnitude. We illustrate the impact through the example of scalar field dark matter, which can alter the cosmological history enough to enable a strongenough firstorder phase transition in the Standard Model when it is supplemented by a dimension six operator directly modifying the Higgs boson potential. We show that due to the modified cosmological history, electroweak baryogenesis can be realized, while keeping deviations of the triple Higgs coupling below HLLHC sensitivies. The required scale of new physics to effectuate a strongenough first order phase transition can change by as much as twenty percent as the expansion rate increases by six orders of magnitude.
 Authors:

 Univ. of Warsaw (Poland); Univ. of Michigan, Ann Arbor, MI (United States)
 Univ. of Michigan, Ann Arbor, MI (United States); Univ. of Vienna (Austria)
 Univ. of Michigan, Ann Arbor, MI (United States)
 Publication Date:
 Research Org.:
 Univ. of Michigan, Ann Arbor, MI (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC)
 OSTI Identifier:
 1438014
 Grant/Contract Number:
 FG0295er40899
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 6; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Country of Publication:
 United States
 Language:
 English
 Subject:
 79 ASTRONOMY AND ASTROPHYSICS; Beyond Standard Model; Cosmology of Theories beyond the SM; Effective field theories; Thermal Field Theory
Citation Formats
Lewicki, Marek, RindlerDaller, Tanja, and Wells, James D. Enabling electroweak baryogenesis through dark matter. United States: N. p., 2016.
Web. doi:10.1007/JHEP06(2016)055.
Lewicki, Marek, RindlerDaller, Tanja, & Wells, James D. Enabling electroweak baryogenesis through dark matter. United States. doi:10.1007/JHEP06(2016)055.
Lewicki, Marek, RindlerDaller, Tanja, and Wells, James D. Thu .
"Enabling electroweak baryogenesis through dark matter". United States. doi:10.1007/JHEP06(2016)055. https://www.osti.gov/servlets/purl/1438014.
@article{osti_1438014,
title = {Enabling electroweak baryogenesis through dark matter},
author = {Lewicki, Marek and RindlerDaller, Tanja and Wells, James D.},
abstractNote = {We study the impact on electroweak baryogenesis from a swifter cosmological expansion induced by dark matter. We detail the experimental bounds that one can place on models that realize it, and we investigate the modifications of these bounds that result from a nonstandard cosmological history. The modifications can be sizeable if the expansion rate of the Universe increases by several orders of magnitude. We illustrate the impact through the example of scalar field dark matter, which can alter the cosmological history enough to enable a strongenough firstorder phase transition in the Standard Model when it is supplemented by a dimension six operator directly modifying the Higgs boson potential. We show that due to the modified cosmological history, electroweak baryogenesis can be realized, while keeping deviations of the triple Higgs coupling below HLLHC sensitivies. The required scale of new physics to effectuate a strongenough first order phase transition can change by as much as twenty percent as the expansion rate increases by six orders of magnitude.},
doi = {10.1007/JHEP06(2016)055},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2016,
place = {United States},
year = {2016},
month = {6}
}
Web of Science
Figures / Tables:
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