Chiral condensate from a hadron resonance gas model

Biswas, Deeptak; Petreczky, Péter; Sharma, Sayantan

doi:10.1103/physrevc.106.045203

Cited by 5 publications

(10 citation statements)

References 85 publications

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“…⟨ ψψ⟩ l,0 is the zero temperature light quark condensate and contains multiplicative as well as additive divergences. We have used a finite observable, defined by multiplying with the strange quark mass m s [13],…”

Section: Renormalized Definitions Of Chiral Condensatementioning

confidence: 99%

“…In this work, we have used an extended HRG model, consisting of both the Particle Data Group mentioned and Quark Model predicted states. This list successfully describes the chiral observables and suitably estimates the pseudo-critical temperature and curvature coefficients [13]. The mean-field parameter has been modified considering this extended HRG (QMHRG).…”

Section: Repulsive Mean-field Interactionmentioning

confidence: 99%

“…In Ref. [13], we have separately categorized all the hadrons and the resonances into different groups with different sigma terms.…”

Section: Mass Derivative Of Hadronsmentioning

confidence: 99%

“…with n α is the Bose-Einstein and Fermi-Dirac distribution for α ≡ mesons and α ≡ baryons respectively. The σ terma are defined as [13],…”

Section: Mass Derivative Of Hadronsmentioning

confidence: 99%

“…The dependence of the pion and kaon masses on light and strange quark masses m l , m s described in terms of S U(2) low energy constants F, B, l3 , F π , are discussed in detail in Ref. [13].…”

Section: Mass Derivative Of Hadronsmentioning

confidence: 99%

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Aspects of chiral transition in a Hadron Resonance Gas model

Biswas

Petrezcky²,

Sharma³

2022

EPJ Web Conf.

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We study the chiral condensate for 2 + 1 flavor QCD with physical quarks within a non-interacting Hadron Resonance Gas (HRG) model. By including the latest information on the mass variation of the hadrons concerning the light quark mass, from lattice QCD and chiral perturbation theory, we show that it is possible to quite accurately account for the chiral crossover transition even within a conventional HRG model. We have calculated a pseudocritical temperature Tc=161.2±1.6 MeV and the curvature of crossover curve κ2=0.0203(7). These are in very good agreement with the latest continuum extrapolated results obtained from lattice QCD studies. We also discuss the limitations of extending such calculations toward the chiral limit. Furthermore, we study the effects of non-resonant hadron interactions within the HRG model and its consequences for the chiral transition in the regime of dense baryonic matter where lattice QCD results are not currently available.

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Section: Renormalized Definitions Of Chiral Condensatementioning

confidence: 99%

Section: Repulsive Mean-field Interactionmentioning

confidence: 99%

“…In Ref. [13], we have separately categorized all the hadrons and the resonances into different groups with different sigma terms.…”

Section: Mass Derivative Of Hadronsmentioning

confidence: 99%

“…with n α is the Bose-Einstein and Fermi-Dirac distribution for α ≡ mesons and α ≡ baryons respectively. The σ terma are defined as [13],…”

Section: Mass Derivative Of Hadronsmentioning

confidence: 99%

Section: Mass Derivative Of Hadronsmentioning

confidence: 99%

See 3 more Smart Citations

Aspects of chiral transition in a Hadron Resonance Gas model

Biswas

Petrezcky²,

Sharma³

2022

EPJ Web Conf.

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Chiral condensate and the equation of state at nonzero baryon density from the hadron resonance gas model with a repulsive mean field

Biswas,

Petreczky,

Sharma

2024

Phys. Rev. C

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We study the QCD equation of state and the chiral condensate using the hadron resonance gas model with repulsive mean-field interactions. We find that the repulsive interactions improve the agreement with the lattice results on the derivatives of the pressure with respect to the baryon chemical potential up to eighth order. From the temperature dependence of the chiral condensate we estimate the crossover temperature as a function of baryon chemical potential, Tpc(μB). We find that the chiral crossover line starts to deviate significantly from the chemical freeze-out line already for μB>400MeV. Furthermore, we find that the chiral pseudocritical line can be parametrized as Tpc(μB)/Tpc(0)=1−κ2[μB/Tpc(0)]2−κ4[μB/Tpc(0)]4 with κ2=0.0150(2) and κ4=3.1(6)×10−5, which are in agreement with lattice QCD results for small values of μB. For the first time we find a tiny but nonzero value of κ4 in our study. Published by the American Physical Society 2024

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Thermodynamics and quark condensates of three-flavor QCD at low temperature

Andersen

Zhou

2023

Phys. Rev. D

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Chiral condensate from a hadron resonance gas model

Cited by 5 publications

References 85 publications

Aspects of chiral transition in a Hadron Resonance Gas model

Aspects of chiral transition in a Hadron Resonance Gas model

Chiral condensate and the equation of state at nonzero baryon density from the hadron resonance gas model with a repulsive mean field

Thermodynamics and quark condensates of three-flavor QCD at low temperature

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