Meson screening masses in (2+1)-flavor QCD

A. Bazavov (Department of Computational Mathematics, Science and Engineering and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA) ; S. Dentinger (Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany) ; H.T. Ding (Key Laboratory of Quark & Lepton Physics (Ministry of Education) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China) ; P. Hegde (Center for High Energy Physics, Indian Institute of Science, Bangalore 560012, India) ; O. Kaczmarek (Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany; Key Laboratory of Quark & Lepton Physics (Ministry of Education) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China) ; et al. - Show all 16 authors

We present lattice QCD results for mesonic screening masses in the temperature range 140 MeVT2500 MeV. Our calculations were carried out using (2+1) flavors of the highly improved staggered quark action, with a physical value for the strange quark mass and two values of the light quark mass corresponding to pion masses of 160 and 140 MeV. Continuum-extrapolated results were obtained using calculations with a variety of lattice spacings corresponding to temporal lattice extents Nτ=616. We discuss the implications of these results for the effective restoration of various symmetries in the high temperature phase of QCD, as well as the approach toward the perturbative limit.

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      "surname": "Lahiri", 
      "given_names": "Anirban", 
      "full_name": "Lahiri, Anirban"
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    {
      "raw_name": "Swagato Mukherjee", 
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      "surname": "Petreczky", 
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      "title": "Meson screening masses in (<math><mrow><mn>2</mn><mo>+</mo><mn>1</mn></mrow></math>)-flavor QCD"
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      "source": "APS", 
      "value": "We present lattice QCD results for mesonic screening masses in the temperature range <math><mrow><mn>140</mn><mtext> </mtext><mtext> </mtext><mi>MeV</mi><mo>\u2272</mo><mi>T</mi><mo>\u2272</mo><mn>2500</mn><mtext> </mtext><mi>MeV</mi></mrow></math>. Our calculations were carried out using (<math><mrow><mn>2</mn><mo>+</mo><mn>1</mn></mrow></math>) flavors of the highly improved staggered quark action, with a physical value for the strange quark mass and two values of the light quark mass corresponding to pion masses of 160 and 140 MeV. Continuum-extrapolated results were obtained using calculations with a variety of lattice spacings corresponding to temporal lattice extents <math><mrow><msub><mrow><mi>N</mi></mrow><mrow><mi>\u03c4</mi></mrow></msub><mo>=</mo><mn>6</mn><mi>\u2013</mi><mn>16</mn></mrow></math>. We discuss the implications of these results for the effective restoration of various symmetries in the high temperature phase of QCD, as well as the approach toward the perturbative limit."
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Published on:
26 November 2019
Publisher:
APS
Published in:
Physical Review D , Volume 100 (2019)
Issue 9
DOI:
https://doi.org/10.1103/PhysRevD.100.094510
arXiv:
1908.09552
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

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