Gluon Condensate in Pion Superfluid beyond Mean Field Approximation

Abstract

We study gluon condensate in a pion superfluid, through calculating the equation of state of the system in the Nambu-Jona-Lasinio model. While in mean field approximation the growing pion condensate leads to an increasing gluon condensate, meson fluctuations reduce the gluon condensate and the broken scalar symmetry can be smoothly restored at finite isospin density.

4 pages, 2 figures

References in corpus (16)

• QCD Phenomenology based on a Chiral Effective Lagrangian
• NJL-model analysis of dense quark matter
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• QCD sum rules at finite temperature
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• $\theta$-dependence of QCD at Finite Isospin Density
• QCD Pressure and the Trace Anomaly
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• Meson Mixing in Pion Superfluid
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Cited by in corpus (1)

• One-meson-loop NJL model: Effect of collective and noncollective excitations on the quark condensate at finite temperature