Speaker
Osvaldo Ferreira
(Universidade Federal do Rio de Janeiro)
Description
We discuss how the passage of the universe through a pion condensed phase and a chiral symmetry breaking would affect its cosmic trajectory at the QCD era. A pion condensed phase could be achieved if large lepton asymmetries were reached at this epoch. To describe the QCD sector we employ a quark-meson model at finite temperature and finite baryon and charge chemical potentials. We show that, for large lepton asymmetries, the universe could go through a first-order phase transition while entering the pion condensed phase, followed by a second order phase transition when it exits it.
Authors
Osvaldo Ferreira
(Universidade Federal do Rio de Janeiro)
Eduardo S. Fraga
(Instituto de Física, Universidade Federal do Rio de Janeiro)
Mauricio Hippert
(Universidade do Estado do Rio de Janeiro)
Prof.
Jürgen Schaffner-Bielich
(Goethe Universität)
