EFFECTIVE SCALAR FIELD-THEORY FOR THE ELECTROWEAK PHASE-TRANSITION

Karsch F, Neuhaus T, PATKOS A (1995)
NUCLEAR PHYSICS B 441(3): 629-657.

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Abstract
We investigate an effective model for the finite-temperature symmetry-restoration phase transition of the electroweak theory. It is obtained by dimensional reduction of the (3 + 1)-dimensional full theory and by subsequent integration over all static gauge degrees of freedom. The resulting theory corresponds to a 3-dimensional 0(4) ferromagnet containing cubic and quartic terms of the field in its potential function. Possible nonperturbative effects of a magnetic screening mass are parametrically included in the potential, We analyse the theory using mean-field and numerical Monte Carlo (MC) simulation methods. At the value of the physical Higgs mass, m(H) = 37 GeV, considered in the present investigation, we find a discontinuous symmetry-restoring phase transition, We determine the critical temperature, order parameter jump, interface tension and latent heat characteristics of the transition. The Monte Carlo results indicate a somewhat weaker first-order phase transition as compared to the mean-field treatment, demonstrating that non-perturbative fluctuations of the Higgs field are relevant, This effect is especially important for the interface tension. Any observation of hard first-order transition could result only from non-perturbative effects related to the gauge degrees of freedom.
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Karsch F, Neuhaus T, PATKOS A. EFFECTIVE SCALAR FIELD-THEORY FOR THE ELECTROWEAK PHASE-TRANSITION. NUCLEAR PHYSICS B. 1995;441(3):629-657.
Karsch, F., Neuhaus, T., & PATKOS, A. (1995). EFFECTIVE SCALAR FIELD-THEORY FOR THE ELECTROWEAK PHASE-TRANSITION. NUCLEAR PHYSICS B, 441(3), 629-657.
Karsch, F., Neuhaus, T., and PATKOS, A. (1995). EFFECTIVE SCALAR FIELD-THEORY FOR THE ELECTROWEAK PHASE-TRANSITION. NUCLEAR PHYSICS B 441, 629-657.
Karsch, F., Neuhaus, T., & PATKOS, A., 1995. EFFECTIVE SCALAR FIELD-THEORY FOR THE ELECTROWEAK PHASE-TRANSITION. NUCLEAR PHYSICS B, 441(3), p 629-657.
F. Karsch, T. Neuhaus, and A. PATKOS, “EFFECTIVE SCALAR FIELD-THEORY FOR THE ELECTROWEAK PHASE-TRANSITION”, NUCLEAR PHYSICS B, vol. 441, 1995, pp. 629-657.
Karsch, F., Neuhaus, T., PATKOS, A.: EFFECTIVE SCALAR FIELD-THEORY FOR THE ELECTROWEAK PHASE-TRANSITION. NUCLEAR PHYSICS B. 441, 629-657 (1995).
Karsch, Frithjof, Neuhaus, Thomas, and PATKOS, A. “EFFECTIVE SCALAR FIELD-THEORY FOR THE ELECTROWEAK PHASE-TRANSITION”. NUCLEAR PHYSICS B 441.3 (1995): 629-657.
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