Symmetry non-restoration via order 10−10 B and L asymmetries

Symmetry Non-Restoration via Order 10−10 B and L Asymmetries

It has been observed that a large lepton asymmetry, nL/s ≈ 0.1, can prevent the Higgs expectation value from going to zero at high temperature, resulting in the non-restoration of the SU(2) × U(1) gauge symmetry and other symmetries. This could allow for the elimination of domain walls and other dangerous topological defects. Here we show that if the reheating temperature after inflation, TR, i...

1 Review of Symmetry Non-restoration and Inverse Symmetry Breaking

Symmetry Non Restoration and Inverse Symmetry Breaking on the Lattice

We study the finite temperature symmetry behaviour of O(N1)×O(N2) scalar models on the lattice and we prove that at sufficiently high temperatures and in arbitrary dimensions their full symmetry is always restored or, equivalently, that the phenomenon of Symmetry Non Restoration which, according to lowest order perturbation theory, takes place in the continuum version of these models, does not ...

Symmetry Non-restoration at High Temperature

We discuss the (non)-restoration of global and local symmetries at high temperature. First, we analyze a two-scalar model with Z2×Z2 symmetry using the exact renormalization group. We conclude that inverse symmetry breaking is possible in this kind of models within the perturbative regime. Regarding local symmetries, we consider the SU(2)⊗U(1) gauge symmetry and focus on the case of a strongly ...

On Symmetry Non-restoration at High Temperature

We study the effect of next-to-leading order contributions on the phenomenon of symmetry non-restoration at high temperature in an O(N1)× O(N2) model. 1 E-mail addresses: [email protected] , [email protected] It is a well known fact that broken symmetries are usually restored at sufficiently high temperatures [1, 2, 3]. Nevertheless, as already noticed by Weinberg [2], there are mode...