Charmonium spectral functions from 2+1 flavour lattice QCD

  • Szabolcs Borsányi
  • Stephan Dürr
  • Zoltán Fodor
  • Christian Hoelbling
  • Sándor D. Katz
  • Stefan Krieg
  • Simon Mages
  • Dániel Nógrádi
  • Attila Pásztor
  • Andreas Schäfer
  • Kálmán K. Szabó
  • Bálint C. Tóth
  • Norbert Trombitás
Open Access
Article

Abstract

Finite temperature charmonium spectral functions in the pseudoscalar and vector channels are studied in lattice QCD with 2+1 flavours of dynamical Wilson quarks, on fine isotropic lattices (with a lattice spacing of 0.057fm), with a non-physical pion mass of mπ ≈ 545 MeV. The highest temperature studied is approximately 1.4Tc. Up to this temperature no significant variation of the spectral function is seen in the pseudoscalar channel. The vector channel shows some temperature dependence, which seems to be consistent with a temperature dependent low frequency peak related to heavy quark transport, plus a temperature independent term at ω > 0. These results are in accord with previous calculations using the quenched approximation.

Keywords

Lattice QCD Phase Diagram of QCD 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2014

Authors and Affiliations

  • Szabolcs Borsányi
    • 1
  • Stephan Dürr
    • 1
    • 2
  • Zoltán Fodor
    • 1
    • 2
    • 3
  • Christian Hoelbling
    • 1
  • Sándor D. Katz
    • 3
    • 4
  • Stefan Krieg
    • 1
    • 2
  • Simon Mages
    • 5
  • Dániel Nógrádi
    • 3
    • 4
  • Attila Pásztor
    • 3
    • 4
  • Andreas Schäfer
    • 5
  • Kálmán K. Szabó
    • 1
    • 2
  • Bálint C. Tóth
    • 1
  • Norbert Trombitás
    • 3
    • 4
  1. 1.University of Wuppertal, Department of PhysicsWuppertalGermany
  2. 2.Jülich Supercomputing CenterJülichGermany
  3. 3.Eötvös UniversityBudapestHungary
  4. 4.MTA-ELTE Lendület Lattice Gauge Theory Research GroupBudapestHungary
  5. 5.University of RegensburgRegensburgGermany

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