Standard Model Baryon Number Violation at Zero Temperature from Higgs Bubble Collisions (opens in new tab)

Author(s): Nabeen Bhusal, Simone Blasi, Martina Cataldi, Aleksandr Chatrchyan, Marco Gorghetto, and Géraldine ServantWe compute for the first time baryon number violation at zero temperature from Higgs bubble collisions and find that it can be of the same order as that from thermal sphalerons in the symmetric phase at electroweak temperatures. We study the dependence of the rate of Chern-Simons number transitions …[Phys. Rev. Lett. 136, 241803] Published Thu Jun 18, 2026