Lattice study of an electroweak phase transition at m_h ~ 126 GeV
High Energy Physics - Phenomenology
2015-06-12 v1 High Energy Physics - Lattice
Abstract
We carry out lattice simulations of a cosmological electroweak phase transition for a Higgs mass m_h ~ 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 m_tR ~ 155 GeV; a more precise effective theory derivation and vacuum renormalization than available at present are needed for confirming this value.
Keywords
Cite
@article{arxiv.1211.7344,
title = {Lattice study of an electroweak phase transition at m_h ~ 126 GeV},
author = {M. Laine and G. Nardini and K. Rummukainen},
journal= {arXiv preprint arXiv:1211.7344},
year = {2015}
}
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22 pages