Lattice study of an electroweak phase transition at mh ~ 126 GeV

Laine, Mikko; Nardini, G.; Rummukainen, K. (2013). Lattice study of an electroweak phase transition at mh ~ 126 GeV. Journal of cosmology and astroparticle physics, 2013(1), 011. Institute of Physics Publishing IOP 10.1088/1475-7516/2013/01/011

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We carry out lattice simulations of a cosmological electroweak phase transition for a Higgs mass mh 126 GeV. The analysis is based on a dimensionally reduced effective theory for an MSSM-like scenario including a relatively light coloured SU(2)-singlet scalar, referred to as a right-handed stop. The non-perturbative transition is stronger than in 2-loop perturbation theory, and may offer a window for electroweak baryogenesis. The main remaining uncertainties concern the physical value of the right-handed stop mass which according to our analysis could be as high as mR 155 GeV; a more precise effective theory derivation and vacuum renormalization than available at present are needed for confirming this value.

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Laine, Mikko Sakari

Subjects:

500 Science > 530 Physics

ISSN:

1475-7516

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

19 Jun 2014 08:42

Last Modified:

08 Oct 2015 09:16

Publisher DOI:

10.1088/1475-7516/2013/01/011

BORIS DOI:

10.7892/boris.43755

URI:

https://boris.unibe.ch/id/eprint/43755

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