The cosmic QCD transition for large lepton flavour asymmetries
  We study the impact of large lepton flavour asymmetries on the cosmic QCD
transition. Scenarios of unequal lepton flavour asymmetries are observationally
almost unconstrained and therefore open up a whole new parameter space in order
to study the nature of the cosmic QCD transition. For very large asymmetries,
we point out two limitations to our current method, namely the possible
formation of a Bose-Einstein condensate of pions and the reliability of the
Taylor expansion applied in this work.
