Cosmology meets functional QCD: First-order cosmic QCD transition induced by large lepton asymmetries

Fei Gao; Isabel M. Oldengott

doi:10.1103/PhysRevLett.128.131301

Cosmology meets functional QCD: First-order cosmic QCD transition induced by large lepton asymmetries

High Energy Physics - Phenomenology 2022-05-19 v2 Cosmology and Nongalactic Astrophysics High Energy Physics - Theory

Authors: Fei Gao , Isabel M. Oldengott

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Abstract

The lepton flavour asymmetries of the Universe are observationally almost unconstrained before the onset of neutrino oscillations. We calculate the cosmic trajectory during the cosmic QCD epoch in the presence of large lepton flavour asymmetries. By including QCD thermodynamic quantities derived from functional QCD methods in our calculation our work reveals for the first time the possibility of a first-order cosmic QCD transition. We specify the required values of the lepton flavour asymmetries for which a first-order transition occurs for a number of different benchmark scenarios.

Keywords

cosmic qcd transition lepton asymmetry functional qcd first-order phase transition neutrino oscillations early universe

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@article{arxiv.2106.11991,
  title  = {Cosmology meets functional QCD: First-order cosmic QCD transition induced by large lepton asymmetries},
  author = {Fei Gao and Isabel M. Oldengott},
  journal= {arXiv preprint arXiv:2106.11991},
  year   = {2022}
}

Comments

7 pages (including appendix), 3 figures; matches version published in Physical Review Letters

Cosmology meets functional QCD: First-order cosmic QCD transition induced by large lepton asymmetries

Abstract

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