Electroweak Phase Transition in the Early Universe
Bastian Bergerhoff,Christof Wetterich +1 more
- Vol. 511, pp 211-240
TLDR
In this paper, the existence and properties of the electroweak phase transition in the early universe depend strongly on the mass of the Higgs scalar MH and the observed baryon asymmetry in the universe therefore implies the necessity of an extension of the standard model.Abstract:
Existence and properties of the electroweak phase transition in the early universe depend strongly on the mass of the Higgs scalar MH. There is presumably no true symmetry restoration at high temperature. Nevertheless, a first order phase transition occurs in the standard model for M H ≲ GeV. For a realistic scalar mass M ≳ GeV the transition to the high temperature regime is described by a crossover, due to the strong electroweak gauge interactions for temperatures near and above the critical temperature. Electroweak baryogenesis during this transition seems not possible within the standard model. The observed baryon asymmetry in the universe therefore implies the necessity of an extension of the standard model.read more
References
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D.A. Kirzhnits,Andrei Linde +1 more
TL;DR: In this paper, the Weinberg model is applied to a large system of thermodynamically equilibrium weakly interacting particles and it is shown that at a temperature higher than about 10 3 GeV the symmetry broken at lower temperature is re-established, the masses of the intermediate bosons vanish and weak interaction becomes a long-range one.
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Baryon Asymmetry of the Universe in Standard Electroweak Theory
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Martin Reuter,Christof Wetterich +1 more
TL;DR: In this paper, a nonperturbative evolution equation for Yang-Mills theories is proposed, which describes the scale dependence of an effective action and the running of the nonabelian gauge coupling in arbitrary dimension.
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