Nonperturbative heavy-quark diffusion in the quark-gluon plasma

被引：229

作者：

van Hees, H. ^{[1
,2
]}

Mannarelli, M. ^{[3
]}

Greco, V. ^{[4
]}

Rapp, R. ^{[1
,2
]}

机构：

[1] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA

[2] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

[3] IEEC CSIC, Inst Ciencias Espacio, E-08193 Barcelona, Spain

[4] Dipartimento Fis & Astron, I-95125 Catania, Italy

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 19期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.192301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We evaluate heavy-quark (HQ) transport properties in a quark-gluon plasma (QGP) within a Brueckner many-body scheme employing interaction potentials extracted from thermal lattice QCD. The in-medium T matrices for elastic charm- and bottom-quark scattering off light quarks in the QGP are dominated by attractive meson and diquark channels which support resonance states up to temperatures of similar to 1.5T(c). The resulting drag coefficient increases with decreasing temperature, contrary to expectations based on perturbative QCD scattering. Employing relativistic Langevin simulations we compute HQ spectra and elliptic flow in root s(NN) = 200 GeV Au-Au collisions. A good agreement with electron decay data supports our nonperturbative computation of HQ diffusion, indicative for a strongly coupled QGP.

引用

页数：4

共 34 条

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