Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration

Clarke D, Kaczmarek O, Karsch F, Lahiri A, Sarkar M (2021)
Physical Review D 103(1): L011501.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
While the Polyakov loop is an order parameter of the deconfinement transition in the heavy quark mass regime of QCD, its sensitivity to the deconfinement of light, dynamical quarks in QCD are not apparent. On the other hand, the quark mass dependence of the Polyakov loop is sensitive to the appearance of a chiral phase transition. Using lattice QCD calculations in the staggered fermion discretization scheme at finite values of the lattice spacing, aT=1/8, we show here, for the first time, that the Polyakov loop expectation value, and the heavy quark free energy extracted from it, behaves like an energylike observable in the vicinity of the chiral phase transition temperature Tc. Consistent with scaling behavior of energylike observables in the 3d, O(2) universality class, the quark mass derivatives diverge in the chiral limit at Tc while the temperature derivatives stay finite. The latter will develop a characteristic spike at Tc. This, however, may be resolved only in calculations with quark masses being 2 orders of magnitude smaller than those currently accessible in lattice QCD calculations.
Erscheinungsjahr
2021
Zeitschriftentitel
Physical Review D
Band
103
Ausgabe
1
Art.-Nr.
L011501
ISSN
2470-0010
eISSN
2470-0029
Page URI
https://pub.uni-bielefeld.de/record/2949881

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Clarke D, Kaczmarek O, Karsch F, Lahiri A, Sarkar M. Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration. Physical Review D. 2021;103(1): L011501.
Clarke, D., Kaczmarek, O., Karsch, F., Lahiri, A., & Sarkar, M. (2021). Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration. Physical Review D, 103(1), L011501. https://doi.org/10.1103/PhysRevD.103.L011501
Clarke, D., Kaczmarek, O., Karsch, F., Lahiri, A., and Sarkar, M. (2021). Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration. Physical Review D 103:L011501.
Clarke, D., et al., 2021. Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration. Physical Review D, 103(1): L011501.
D. Clarke, et al., “Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration”, Physical Review D, vol. 103, 2021, : L011501.
Clarke, D., Kaczmarek, O., Karsch, F., Lahiri, A., Sarkar, M.: Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration. Physical Review D. 103, : L011501 (2021).
Clarke, David, Kaczmarek, Olaf, Karsch, Frithjof, Lahiri, Anirban, and Sarkar, Mugdha. “Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration”. Physical Review D 103.1 (2021): L011501.
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Data Publication: Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration
Clarke D, Kaczmarek O, Karsch F, Lahiri A, Sarkar M (2021)
Bielefeld University.

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arXiv: 2008.11678

Inspire: 1813357

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