Charmonium spectral functions from 2+1 flavour lattice QCD

被引：34

作者：

Borsanyi, Szabolcs ^{[1
]}

Duerr, Stephan ^{[1
,2
]}

Fodor, Zoltan ^{[1
,2
,3
]}

Hoelbling, Christian ^{[1
]}

Katz, Sandor D. ^{[3
,4
]}

Krieg, Stefan ^{[1
,2
]}

Mages, Simon ^{[5
]}

Nogradi, Daniel ^{[3
,4
]}

Pasztor, Attila ^{[3
,4
]}

Schaefer, Andreas ^{[5
]}

Szabo, Kalman K. ^{[1
,2
]}

Toth, Balint C. ^{[1
]}

Trombitas, Norbert ^{[3
,4
]}

机构：

[1] Univ Wuppertal, Dept Phys, D-42097 Wuppertal, Germany

[2] Julich Supercomp Ctr, D-52425 Julich, Germany

[3] Eotvos Lorand Univ, H-1117 Budapest, Hungary

[4] MTA ELTE Lendulet Lattice Gauge Theory Res Grp, H-1117 Budapest, Hungary

[5] Univ Regensburg, D-93053 Regensburg, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 04期

基金：

匈牙利科学研究基金会;

关键词：

Lattice QCD; Phase Diagram of QCD; MAXIMUM-ENTROPY ANALYSIS; CONTINUUM-LIMIT; FREE-ENERGIES;

D O I：

10.1007/JHEP04(2014)132

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

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(pi) approximate to 545 MeV. The highest temperature studied is approximately 1.4T(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 omega > 0. These results are in accord with previous calculations using the quenched approximation.

引用

页数：19

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