Cosmology Meets Functional QCD: First-Order Cosmic QCD Transition Induced by Large Lepton Asymmetries
Fei Gao, Isabel M. Oldengott
Abstract
The lepton flavor 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 flavor 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 flavor asymmetries for which a first-order transition occurs for a number of different benchmark scenarios.
Topics & Concepts
PhysicsParticle physicsQuantum chromodynamicsLeptonNeutrinoCOSMIC cancer databaseNuclear physicsAstrophysicsElectronParticle physics theoretical and experimental studiesCosmology and Gravitation TheoriesHigh-Energy Particle Collisions Research