Meson Screening Mass in a Strongly Coupled Pion Superfluid
Yin Jiang, Ke Ren, Tao Xia, Pengfei Zhuang
TL;DR
This paper investigates the behavior of meson screening masses in a pion superfluid using the NJL model, revealing persistent strong coupling effects due to Goldstone modes at finite isospin density.
Contribution
It provides a detailed calculation of meson screening masses in a pion superfluid within the NJL framework, highlighting the unique effects of isospin density on quark potential.
Findings
Minimum of quark potential at phase boundary
Potential remains strong at finite isospin density
Matter stays in a strongly coupled phase due to Goldstone modes
Abstract
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 can not be efficiently suppressed and the matter is always in a strongly coupled phase due to the Goldstone mode in the pion superfluid.
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