First order thermal phase transition with 126 GeV Higgs mass

Laine, Mikko Sakari; Nardini, G.; Rummukainen, K. (20 November 2014). First order thermal phase transition with 126 GeV Higgs mass. PoS - proceedings of science, LATTICE2013(104). Scuola Internazionale Superiore di Studi Avanzati SISSA

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We study the strength of the electroweak phase transition in models with two light Higgs doublets and a light SU(3)c triplet by means of lattice simulations in a dimensionally reduced effective theory. In the parameter region considered the transition on the lattice is significantly stronger than indicated by a 2-loop perturbative analysis. Within some ultraviolet uncertainties, the finding applies to MSSM with a Higgs mass mh ≈ 126 GeV and shows that the parameter region useful for electroweak baryogenesis is enlarged. In particular (even though only dedicated analyses can quantify the issue), the tension between LHC constraints after the 7 TeV and 8 TeV runs and frameworks where the electroweak phase transition is driven by light stops, seems to be relaxed.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Laine, Mikko Sakari

Subjects:

500 Science > 530 Physics

ISSN:

1824-8039

Publisher:

Scuola Internazionale Superiore di Studi Avanzati SISSA

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

02 Dec 2014 14:05

Last Modified:

04 Dec 2014 21:05

BORIS DOI:

10.7892/boris.60600

URI:

https://boris.unibe.ch/id/eprint/60600

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