Thermal quarkonium physics in the pseudoscalar channel

Y. Burnier (Gymnase de Renens, Av. du Silo 1, Renens, CH-1020, Switzerland) ; H.T. Ding (Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan, 430079, China) ; O. Kaczmarek (Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan, 430079, China; Fakultät für Physik, Universität Bielefeld, Bielefeld, 33615, Germany) ; A.L. Kruse (Fakultät für Physik, Universität Bielefeld, Bielefeld, 33615, Germany) ; M. Laine (AEC, ITP, University of Bern, Sidlerstrasse 5, Bern, CH-3012, Switzerland) ; et al. - Show all 7 authors

The pseudoscalar correlator is an ideal lattice probe for thermal modifications to quarkonium spectra, given that it is not compromised by a contribution from a large transport peak. We construct a perturbative spectral function incorporating resummed thermal effects around the threshold and vacuum asymptotics above the threshold, and compare the corresponding imaginary-time correlators with continuum-extrapolated lattice data for quenched SU(3) at several temperatures. Modest differences are observed, which may originate from non-perturbative mass shifts or renormalization factors, however no resonance peaks are needed for describing the quenched lattice data for charmonium at and above T ∼ 1.1T c ∼ 350 MeV. For comparison, in the bottomonium case a good description of the lattice data is obtained with a spectral function containing a single thermally broadened resonance peak.

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          "country": "China", 
          "value": "Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan, 430079, China", 
          "organization": "Central China Normal University"
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      "surname": "Ding", 
      "email": "hengtong.ding@mail.ccnu.edu.cn", 
      "full_name": "Ding, H.T.", 
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      "surname": "Kaczmarek", 
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      "full_name": "Kaczmarek, O.", 
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          "organization": "Universit\u00e4t Bielefeld"
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      "surname": "Kruse", 
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      "surname": "Laine", 
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          "organization": "University of Tsukuba"
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        {
          "country": "USA", 
          "value": "Physics Department, Brookhaven National Laboratory, Upton, NY, 11973, U.S.A.", 
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      "surname": "Ohno", 
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      "value": "The pseudoscalar correlator is an ideal lattice probe for thermal modifications to quarkonium spectra, given that it is not compromised by a contribution from a large transport peak. We construct a perturbative spectral function incorporating resummed thermal effects around the threshold and vacuum asymptotics above the threshold, and compare the corresponding imaginary-time correlators with continuum-extrapolated lattice data for quenched SU(3) at several temperatures. Modest differences are observed, which may originate from non-perturbative mass shifts or renormalization factors, however no resonance peaks are needed for describing the quenched lattice data for charmonium at and above T \u223c 1.1T c \u223c 350 MeV. For comparison, in the bottomonium case a good description of the lattice data is obtained with a spectral function containing a single thermally broadened resonance peak."
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Published on:
30 November 2017
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2017 (2018)
Issue 11
Pages 1-27
DOI:
https://doi.org/10.1007/JHEP11(2017)206
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: