Collisional dissociation of heavy mesons in dense QCD matter

被引：138

作者：

Adil, Azfar

Vitev, Ivan ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Columbia Univ, Dept Phys & Astron, New York, NY 10027 USA

[3] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

[4] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA

来源：

PHYSICS LETTERS B | 2007年 / 649卷 / 2-3期

基金：

美国能源部;

关键词：

D O I：

10.1016/j.physletb.2007.03.050

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the framework of the reaction operator approach we calculate and resum the multiple elastic scattering of a fast q (q) over bar system traversing dense nuclear matter. We derive the collisional broadening of the meson's transverse momentum and the distortion of its intrinsic light cone wave function. The medium-induced dissociation probability of heavy mesons is shown to be sensitive to the opacity of the quark-gluon plasma and the time dependence of its formation and evolution. We solve the system of coupled rate equations that describe the competition between the fragmentation of c- and b-quarks and the QGP-induced dissociation of the D- and B-mesons to evaluate the quenching of heavy hadrons in nucleus-nucleus collisions. In contrast to previous results on heavy quark modification, this approach predicts suppression of B-mesons comparable to that of D-mesons at transverse momenta as low as p(T) similar to 10 GeV. It allows for an improved description of the large attenuation of non-photonic electrons in central Au + Au reactions at RHIC. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：139 / 146

页数：8

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