Cosmic QCD transition for large lepton flavor asymmetries

2022/06/28 by Mandy M. Middeldorf-Wygas, Isabel M. Oldengott, Dietrich Bödeker +1 · 27 citations
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #COSMIC cancer database #Cosmology and Gravitation Theories #Lattice QCD #Lepton #Nuclear physics #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum chromodynamics

paper · pdf · doi:10.1103/physrevd.105.123533

published in Physical review. D/Physical review. D. 105(12) (American Physical Society)

openalex publication_date 2022/06/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We study the impact of large lepton flavor asymmetries on the cosmic QCD transition. Scenarios of unequal lepton flavor asymmetries are observationally almost unconstrained and therefore open up a whole new parameter space for the cosmic QCD transition. We find that for large asymmetries, the formation of a Bose-Einstein condensate of pions can occur and identify the corresponding parameter space. In the vicinity of the QCD transition scale, we express the pressure in terms of a Taylor expansion with respect to the complete set of chemical potentials. The Taylor coefficients rely on input from lattice QCD calculations from the literature. The domain of applicability of this method is discussed.

Citations

• Observation of Gravitational Waves from a Binary Black Hole Merger
• QCD phase diagram for nonzero isospin-asymmetry

Cited by

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• Primordial Black Hole Formation Beyond the Standard Cosmic QCD Transition
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• Affleck-Dine Leptoflavorgenesis
• Maximal parameter space of sterile neutrino dark matter with lepton asymmetries
• Primordial black-hole formation and heavy r-process element synthesis from the cosmological QCD transition. Two aspects of an inhomogeneous early Universe

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