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Sphalerons in the Standard Model with a real Higgs singlet

J. Choi

hep-pharXiv:hep-ph/9409360

Abstract

Sphaleron energies within the standard model with a real Higgs singlet added on are calculated. The coupled non-linear equations of motion are numerically solved and the sphaleron energy evaluated for a set of parameters in the Higgs potential. I find a small difference in the sphaleron energy compared to the standard model. A slightly stronger constraint on the strength of the first order phase transition thus results for this model.

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