Cosmic QCD Epoch at Nonvanishing Lepton Asymmetry

Abstract

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.

6 pages, 2 figures; v2: published version (including minor additional remarks and references)

References in corpus (33)

• Planck 2015 results. XIII. Cosmological parameters
• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Signatures of the Tricritical Point in QCD
• Is there still any Tc mystery in lattice QCD? Results with physical masses in the continuum limit III
• Leptogenesis as the origin of matter
• The QCD Equation of State to $\mathcal{O}({\mu }_B^6)$ from Lattice QCD
• The QCD phase transition with physical-mass, chiral quarks
• Cosmological bounds on neutrino degeneracy improved by flavor oscillations
• Quark mass thresholds in QCD thermodynamics
• Fluctuations and Correlations of net baryon number, electric charge, and strangeness: A comparison of lattice QCD results with the hadron resonance gas model
• QCD phase diagram and the critical point
• Analytical treatment of neutrino asymmetry equilibration from flavour oscillations in the early universe
• QCD phase diagram for nonzero isospin-asymmetry
• Lepton asymmetry and the cosmic QCD transition
• Sterile neutrino dark matter: A tale of weak interactions in the strong coupling epoch
• Updated BBN bounds on the cosmological lepton asymmetry for non-zero theta13
• The first second of the Universe
• The melting and abundance of open charm hadrons
• Quark number susceptibilities of hot QCD up to g^6ln(g)
• Generation of Large Lepton Asymmetries
• Relic density of neutrinos with primordial asymmetries
• Improved determination of sterile neutrino dark matter spectrum
• Quark number susceptibilities, strangeness and dynamical confinement
• Improved constraints on lepton asymmetry from the cosmic microwave background
• Constraints on the Electrical Charge Asymmetry of the Universe
• Charm Degrees of Freedom in Quark Gluon Plasma
• Resurrection of large lepton number asymmetries from neutrino flavor oscillations
• Fermion number violating effects in low scale leptogenesis
• Neutrino flavor transformation in the lepton-asymmetric universe
• Pulsars probe the low-frequency gravitational sky: Pulsar Timing Arrays basics and recent results
• Pion condensation in a dense neutrino gas
• On large lepton number asymmetries of the Universe
• Lepton Asymmetry of the Universe and Charged Quark-Gluon Plasma

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• Energy dependent chemical potentials of light hadrons and quarks based on transverse momentum spectra and yield ratios of negative to positive particles
• Chemical potentials of light hadrons and quarks from yield ratios of negative to positive particles in high energy $pp$ collisions
• Diffusion coefficients and constraints on hadronic inhomogeneities in the early universe
• Chiral symmetry breaking and pion condensation in the early universe
• The cosmic QCD transition for large lepton flavour asymmetries
• Primordial Black Holes Formation Beyond the Standard Cosmic QCD Transition
• Absence of charged pion condensation in a magnetic field with parallel rotation