Cosmic QCD transition for large lepton flavor asymmetries

2022/06/28 by Mandy M. Middeldorf-Wygas, Isabel M. Oldengott, Dietrich Bödeker +1 · 6 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #Black Holes and Theoretical Physics

paper · pdf · doi:10.1103/physrevd.105.123533

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

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