Speaker
Patrick Kneschke
(University of Stavanger)
Description
The quark-meson model is often used as an effective low-energy model for QCD to study the chiral
transition at finite temperature T, baryon chemical potential \mu and isospin chemical potential \mu_I.
We determine the model parameters to one-loop order and express them in terms of the physical meson and quark masses, as well as the pion decay constant using on-shell renormalization. We study the existence of different phases at zero temperature. In particular, we investigate the competition between an inhomogeneous chiral condensate and a pion condensate. We show that due to our parameter fixing, the onset of pion
condensation takes place exactly at \mu_I = m_\pi/2 in accordance with exact results. Furthermore the existence of an inhomogeneous phase at large \mu in a certain parameter window is shown.
Primary author
Patrick Kneschke
(University of Stavanger)
