Electroweak preheating on a lattice

Details Electroweak preheating on a lattice Electroweak preheating on a lattice

2000-12-08

arxiv.org/abs/hep-ph/0012097v3

Phys.Rev. D63 (2001) 123512

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 6 figures. Parts of the text rewritten, one new figure added, some references added. Final version

Scientific paper

10.1103/PhysRevD.63.123512

In many inflationary models, a large amount of energy is transferred rapidly to the long-wavelength matter fields during a period of preheating after inflation. We study how this changes the dynamics of the electroweak phase transition if inflation ends at the electroweak scale. We simulate a classical SU(2)xU(1)+Higgs model with initial conditions in which the energy is concentrated in the long-wavelength Higgs modes. With a suitable initial energy density, the electroweak symmetry is restored non-thermally but broken again when the fields thermalize. During this symmetry restoration, baryon number is violated, and we measure its time evolution, pointing out that it is highly non-Brownian. This makes it difficult to estimate the generated baryon asymmetry.

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