Phase diagram of interacting pion matter and isospin charge fluctuations
Phase diagram of interacting pion matter and isospin charge fluctuations
Equation of state and electric (isospin) charge fluctuations are studied for matter composed of interacting pions. The pion matter is described by self interacting scalar fields via a ${\ensuremath{\phi}}^{4}\text{\ensuremath{-}}{\ensuremath{\phi}}^{6}$-type Lagrangian. The mean-field approximation is used, and interaction parameters are fixed by fitting lattice QCD results on the isospin density as …