Electroweak phase transition in Georgi–Machacek model

The Georgi–Machacek model extends the standard model Higgs sector by adding two isospin triplet scalar fields and imposing global SU(2)R symmetry on them. A feature of the model is that the triplets can acquire a large vacuum expectation value without conflicting with the current experimental bound...

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Bibliographic Details
Published inPhysics letters. B Vol. 735; pp. 295 - 300
Main Authors Chiang, Cheng-Wei, Yamada, Toshifumi
Format Journal Article
LanguageEnglish
Published Elsevier B.V 30.07.2014
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Summary:The Georgi–Machacek model extends the standard model Higgs sector by adding two isospin triplet scalar fields and imposing global SU(2)R symmetry on them. A feature of the model is that the triplets can acquire a large vacuum expectation value without conflicting with the current experimental bound on the ρ parameter. We investigate the electroweak phase transition in the Georgi–Machacek model by evaluating the finite-temperature effective potential of the Higgs sector. The electroweak phase transition can be sufficiently strong in a large parameter space when the triplets acquire a vacuum expectation value of O(10) GeV, opening a possibility to realize successful electroweak baryogenesis.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2014.06.048