Order g^2 susceptibilities in the symmetric phase of the Standard Model

Abstract

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.

arXiv comment18 pages, 2 figures

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• Lepton asymmetry rate from quantum field theory: NLO in the hierarchical limit
• A thermal neutrino interaction rate at NLO
• Non-relativistic susceptibility and a dark matter application
• A data-based parametrization of parton distribution functions
• Phenomenology of Baryogenesis from Lepton-Doublet Mixing
• Sterile neutrino rates for general $M$, $T$, $\mu$, $k$: review of a theoretical framework
• Unitarity and CP violation in leptogenesis at NLO: general considerations and top Yukawa contributions