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The Sphaleron Rate through the Electroweak Cross-over

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arxiv 1207.0685 v2 pith:35ARF7EA submitted 2012-07-03 hep-ph hep-lat

Michela D'Onofrio , Kari Rummukainen , Anders Tranberg This is my paper · ORCID
classification hep-phhep-lat
keywords electroweakratesphalerontemperaturecross-overbaryonbrokennon-zero
verification ladder T0 review T1 audit T2 compute T3 formal
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Using lattice simulations, we measure the sphaleron rate in the Standard Model as a function of temperature through the electroweak cross-over, for the Higgs masses m_H=115 and m_H=160 GeV. We pay special attention to the shutting off of the baryon rate as the temperature is lowered. This quantity enters computations of Baryogenesis via Leptogenesis, where non-zero lepton number is converted into non-zero baryon number by equilibrium sphaleron transitions. Combining existing numerical methods applicable in the symmetric and broken electroweak phases, we find the temperature dependence of the sphaleron rate at very high temperature, through the electroweak cross-over transition, and deep into the broken phase.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. An Effective Sphaleron Awakens

    hep-ph 2025-06 conditional novelty 7.0 of 10

    A consistent 3D EFT computation of the Higgs phase sphaleron rate yields universal baryon preservation bounds x ≈ 0.025 (strong) and x ≈ 0.036 (weak), and shows two-loop corrections eliminate strong one-step transitio...

  2. CosmoLattice 2.0

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    CosmoLattice v2.0 extends lattice cosmology simulations with non-minimal scalars, ALP–gauge couplings, defect networks, low-storage RK integrators, optimized GWs, and O(10) GPU speedups.

  3. Eogenesis via the High-scale Electroweak Symmetry Restoration

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A primordial right-handed electron asymmetry, kept out of equilibrium by high-scale electroweak symmetry non-restoration, can be converted by sphalerons into the observed baryon asymmetry without B-L violation.

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