Mr Marc Sangel (Universität Bielefeld)
Susceptibilities of conserved charges such as baryon minus lepton number enter baryogenesis computations, since they provide the relationship between conserved charges and chemical potentials. Their next-to-leading order corrections are of order $ g $, where $ g $ is a generic Standard Model coupling. They are due to soft Higgs boson exchange, and have been calculated recently, together with some order $ g ^ 2 $ corrections. Here we compute the complete $ g ^ 2 $ contributions. Close to the electroweak crossover the soft Higgs contribution is of order $ g ^ 2 $, and is determined by the non-perturbative physics at the magnetic screening scale.