Regular Article - Theoretical Physics
Meson screening mass in a strongly coupled pion superfluid
Physics Department, Tsinghua University, Beijing, 100084, China
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Revised: 16 November 2011
Published online: 6 December 2011
We calculate the meson screening mass in a pion superfluid in the framework of Nambu–Jona-Lasinio model. The minimum of the attractive quark potential is always located at the phase boundary of pion superfluid. Different from the temperature and baryon density effect, the potential at finite isospin density cannot be efficiently suppressed and the matter is always in a strongly coupled phase due to the Goldstone mode in the pion superfluid.
© Springer-Verlag / Società Italiana di Fisica, 2011