{"arxiv_id":"hep-ph/0310342","title":"Baryon asymmetry from electroweak tachyonic preheating","abstract":"We consider a scenario in which the baryon asymmetry was created in the early universe during a cold electroweak transition. The spinodal instability of the Higgs field caused by a rapid change of sign of its effective mass-squared parameter induces tachyonic preheating. We study the development of Chern-Simons number in this transition by numerical lattice simulations of the SU(2)-Higgs model with an added effective CP-violating term. A net asymmetry is produced, and we study its dependence on the size of CP violation and the ratio of Higgs to W mass.","primary_cat":"hep-ph","cross_cats":["astro-ph","hep-lat"],"submitted_at":"2003-10-30T11:58:50+00:00","latest_version":1,"source":"arxiv","source_label":"arXiv","source_url":null,"has_pdf":true,"has_source":false,"verdict":"CONDITIONAL","confidence":"HIGH","one_line_summary":"Lattice simulations of a cold electroweak quench show a net baryon asymmetry proportional to an effective CP-violating coupling, at a size that could match the observed universe with modest CP violation.","novelty_score":6.0,"correctness_risk":"medium","formal_verification":"none","upvotes":0,"downvotes":0,"pith_score":0.0,"inbound_count":16,"_links":{"html":"https://pith.science/paper/hep-ph/0310342","verdict":"/api/v1/verdicts/hep-ph/0310342"}}