Baryogenesis and gravity waves from a UV-completed electroweak phase transition

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dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor.author Laurent, Benoit
dc.contributor.author Cline, James M.
dc.contributor.author Friedlander, Avi
dc.contributor.author He, Dong-Ming
dc.contributor.author Kainulainen, Kimmo
dc.contributor.author Tucker-Smith, David
dc.date.accessioned 2021-07-28T09:28:01Z
dc.date.available 2021-07-28T09:28:01Z
dc.date.issued 2021-06-10
dc.identifier.citation Laurent , B , Cline , J M , Friedlander , A , He , D-M , Kainulainen , K & Tucker-Smith , D 2021 , ' Baryogenesis and gravity waves from a UV-completed electroweak phase transition ' , Physical Review D , vol. 103 , no. 12 , 123529 . https://doi.org/10.1103/PhysRevD.103.123529 en
dc.identifier.issn 2470-0010
dc.identifier.other PURE: 166969165
dc.identifier.other PURE UUID: ec9292ab-8006-4b76-9b27-e8139135cf8f
dc.identifier.other WOS: 000661817600007
dc.identifier.other Scopus: 85108203614
dc.identifier.uri http://hdl.handle.net/10138/332642
dc.description.abstract We study gravity wave production and baryogenesis at the electroweak phase transition in a real singlet scalar extension of the Standard Model, including vectorlike top partners, to generate the CP violation needed for electroweak baryogenesis (EWBG). The singlet makes the phase transition strongly first order through its coupling to the Higgs boson, and it spontaneously breaks CP invariance through a dimension-five contribution to the top quark mass term, generated by integrating out the heavy top quark partners. We improve on previous studies by incorporating updated transport equations, compatible with large bubble wall velocities. The wall speed and thickness are computed directly from the microphysical parameters rather than treating them as free parameters, allowing for a first-principles computation of the baryon asymmetry. The size of the CP-violating dimension-five operator needed for EWBG is constrained by collider, electroweak precision, and renormalization group running constraints. We identify regions of parameter space that can produce the observed baryon asymmetry or observable gravitational wave (GW) signals. Contrary to standard lore, we find that for strong deflagrations, the efficiencies of large baryon asymmetry production and strong GW signals can be positively correlated. However, we find the overall likelihood of observably large GW signals to be smaller than estimated in previous studies. In particular, only detonation-type transitions are predicted to produce observably large gravitational waves. en
dc.format.extent 24
dc.language.iso eng
dc.relation.ispartof Physical Review D
dc.rights en
dc.subject 115 Astronomy, Space science en
dc.subject 114 Physical sciences en
dc.title Baryogenesis and gravity waves from a UV-completed electroweak phase transition en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1103/PhysRevD.103.123529
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl

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