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Cosmic QCD Epoch at Nonvanishing Lepton Asymmetry

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arxiv 1807.10815 v2 pith:UZZWJVSO submitted 2018-07-27 hep-ph astro-ph.COhep-lat

Mandy M. Wygas , Isabel M. Oldengott , Dietrich Bodeker , Dominik J. Schwarz This is my paper · ORCID
classification hep-phastro-ph.COhep-lat
keywords leptonasymmetrychemicalcosmicbaryonepochevolutionideal
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We investigate how a lepton asymmetry impacts the cosmic trajectory in the QCD phase diagram. We study the evolution of chemical potentials during the QCD epoch of the early Universe using susceptibilities from lattice QCD to interpolate between an ideal quark gas and an ideal hadron resonance gas. The lepton asymmetry affects the evolution of all chemical potentials. The standard cosmic trajectory is obtained assuming tiny lepton and baryon asymmetries. For larger lepton asymmetry, the charge chemical potential exceeds the baryon chemical potential before pion annihilation.

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Cited by 2 Pith papers

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    First mapping of the QCD critical surface in full (T, μ_B, μ_Q, μ_S) space via constant-entropy expansion gives a critical point at (114, 602) MeV in the pure baryon direction, with μ_B,c shifting 40-100 MeV in strang...

  2. Renormalization group invariant mean-field model for QCD at finite isospin density

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    A renormalization-group invariant mean-field quark-meson model with one fitted scale reproduces lattice QCD thermodynamics at finite isospin density and predicts a multicritical chiral/pion-condensation point in the c...

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