Chiral dynamics in QCD at finite chemical potential

Abstract

We present the renormalized Taylor expansion of the chiral condensate with chemical potential. The relation with the Taylor coefficients of meson susceptibilities and the quark mass dependence of the quark number susceptibilities are obtained through chiral Ward identities and Maxwell relations. The continuum limit is obtained in quenched and two flavour QCD. In Nf=2 QCD, the quadratic response coefficients (QRCs) of the chiral condensate to chemical potential indicate that pion fluctuations decrease at finite chemical potential toward the critical end point. We discuss how these observables can be used to test other features of the QCD phase diagram.

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Cited by in corpus (12)

• The critical end point of QCD
• The phase boundary for the chiral transition in (2+1)-flavor QCD at small values of the chemical potential
• Susceptibilities and speed of sound from PNJL model
• Fluctuations, strangeness and quasi-quarks in heavy-ion collisions from lattice QCD
• The calculation of the equation of state of QCD at finite chemical potential and zero temperature
• Lattice QCD Equation of State for Nonvanishing Chemical Potential by Resumming Taylor Expansion
• A thermodynamically consistent quasi-particle model without density-dependent infinity of the vacuum zero point energy
• Reparametrizing the Polyakov$-$Nambu$-$Jona-Lasinio model
• Thermodynamics of strongly interacting matter in a hybrid model
• Robustness of baryon-strangeness correlation and related ratios of susceptibilities
• The Equation of State and Quark Number Susceptibility in Hard-Dense-Loop Approximation
• Results from Lattice QCD