Ring diagrams and electroweak phase transition in a magnetic field

Details Ring diagrams and electroweak phase transition in a magnetic field Ring diagrams and electroweak phase transition in a magnetic field

1999-04-14

arxiv.org/abs/hep-ph/9904333v2

Int.J.Mod.Phys. A15 (2000) 349-362

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, Latex, changed for a mistake in the numerical part

Scientific paper

10.1142/S0217751X00000161

Electroweak phase transition in a magnetic field is investigated within the one-loop and ring diagram contributions to the effective potential in the minimal Standard Model. All fundamental fermions and bosons are included with their actual values of masses and the Higgs boson mass is considered in the range $75 GeV \leq m_H \leq 115 GeV$. The effective potential is real at sufficiently high temperature. The important role of fermions and $W$-bosons in symmetry behaviour is observed. It is found that the phase transition for the field strengths $10^{23} - 10^{24}$G is of first order but the baryogenesis condition is not satisfied. The comparison with the hypermagnetic field case is done.

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