Electroweak preheating on a lattice
摘要
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.
引用
@article{arxiv.hep-ph/0012097,
title = {Electroweak preheating on a lattice},
author = {A. Rajantie and P. M. Saffin and E. J. Copeland},
journal= {arXiv preprint arXiv:hep-ph/0012097},
year = {2009}
}
备注
22 pages, 6 figures. Parts of the text rewritten, one new figure added, some references added. Final version