Charmonium spectral functions from 2+1 flavour lattice QCD

• Published in: The journal of high energy physics 2014-04, Vol.2014 (4), p.1-19, Article 132
• Main Authors: Borsányi, Szabolcs, Dürr, Stephan, Fodor, Zoltán, Hoelbling, Christian, Katz, Sándor D., Krieg, Stefan, Mages, Simon, Nógrádi, Dániel, Pásztor, Attila, Schäfer, Andreas, Szabó, Kálmán K., Tóth, Bálint C., Trombitás, Norbert
• Format: Article
• Language: English
• Subjects: Channels; Classical and Quantum Gravitation; Elementary Particles; Flavor (particle physics); High energy physics; Lattices; Mathematical analysis; Physics; Physics and Astronomy; Quantum chromodynamics; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Relativity Theory; Spectra; String Theory; Vectors (mathematics)
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP04(2014)132

A bstract 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.