Charmonium spectral functions from 2+1 flavour lattice QCD
- Szabolcs BorsányiUniversity of Wuppertal, Department of Physics, Wuppertal D-42097, Germany
- Stephan Dürr(University of Wuppertal, Department of Physics, Wuppertal D-42097, Germany)
- Zoltán Fodor(University of Wuppertal, Department of Physics, Wuppertal D-42097, Germany)
- Christian Hoelbling(University of Wuppertal, Department of Physics, Wuppertal D-42097, Germany)
- Sándor D. Katz(Eötvös University, Budapest, H-1117, Hungary)
- Stefan Krieg(University of Wuppertal, Department of Physics, Wuppertal D-42097, Germany)
- Simon Mages(University of Regensburg, Regensburg D-93053, Germany)
- Dániel Nógrádi(Eötvös University, Budapest, H-1117, Hungary)
- Attila Pásztor(Eötvös University, Budapest, H-1117, Hungary)
- Andreas Schäfer(University of Regensburg, Regensburg D-93053, Germany)
- Kálmán K. Szabó(University of Wuppertal, Department of Physics, Wuppertal D-42097, Germany)
- Bálint C. Tóth(University of Wuppertal, Department of Physics, Wuppertal D-42097, Germany)
- Norbert Trombitás(Eötvös University, Budapest, H-1117, Hungary)
Publication date
October 2014
DOIAbstract
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 m π ≈ 545 MeV. The highest temperature studied is approximately 1.4 T c . 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
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