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High Energy Physics - Lattice

arXiv:1311.4424 (hep-lat)
[Submitted on 18 Nov 2013]

Title:First order thermal phase transition with 126 GeV Higgs mass

Authors:M. Laine (1), G. Nardini (2), K. Rummukainen (3) ((1) University of Bern, (2) University of Bielefeld and DESY, (3) University of Helsinki)
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Abstract: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 m_h approximately 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.
Comments: Presented at 31st International Symposium on Lattice Field Theory - LATTICE 2013
Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1311.4424 [hep-lat]
  (or arXiv:1311.4424v1 [hep-lat] for this version)
  https://doi.org/10.48550/arXiv.1311.4424

Submission history

From: Kari Rummukainen [view email]
[v1] Mon, 18 Nov 2013 15:31:56 UTC (24 KB)
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