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• W2610109988 abstract "Chiral symmetry is always broken in cold, dense matter, by chiral condensation at low densities and by diquark condensation at high density. We construct here, within a schematic Nambu-Jona-Lasinio (NJL) model, the corresponding generalized Nambu-Goldstone pion, $pi_G$. As we show, the $pi_G$ mode naturally emerges as a linear combination of the $langle bar{q}qrangle$ vacuum pion $pi$ and the $langle qq rangle$ diquark condensate pion $tilde{pi}$, with $q$ the quark field, and continuously evolves with increasing density from being $pi$-like in the vacuum to $tilde{pi}$-like in the high density diquark pairing phase. We calculate the density-dependent mass, decay constant, and coupling to quarks of the $pi_G$, and derive a generalized Gell-Mann--Oakes--Renner (GMOR) relation in the presence of a finite bare quark mass $m_q$. We briefly discuss the implications of the results to possible Bose condensation of $pi_G$ in more realistic models." @default.
• W2610109988 created "2017-05-05" @default.
• W2610109988 creator A5020952681 @default.
• W2610109988 creator A5065232236 @default.
• W2610109988 date "2017-08-21" @default.
• W2610109988 modified "2023-09-23" @default.
• W2610109988 title "Generalized Nambu-Goldstone pion in dense matter: A schematic Nambu–Jona-Lasinio model" @default.
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• W2610109988 doi "https://doi.org/10.1103/physrevc.96.025206" @default.
• W2610109988 hasPublicationYear "2017" @default.
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