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arXiv · 1404.5182

Electroweak Phase Transition in Georgi-Machacek Model

Cheng-Wei Chiang·Toshifumi Yamada
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Abstract

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.

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Cheng-Wei Chiang, Toshifumi Yamada. 2014-04-21. Electroweak Phase Transition in Georgi-Machacek Model. https://doi.org/10.1016/j.physletb.2014.06.048

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