Diffusion of Λc in hot hadronic medium and its impact on Λc/D ratio

被引：26

作者：

Ghosh, Sabyasachi ^{[1
]}

Das, Santosh K. ^{[2
,3
]}

Greco, Vincenzo ^{[2
,3
]}

Sarkar, Sourav ^{[4
]}

Alam, Jan-e ^{[4
]}

机构：

[1] Univ Estadual Paulista, Inst Fsica Ter, BR-01140070 Sao Paulo, Brazil

[2] Univ Catania, Dept Phys & Astron, I-95125 Catania, Italy

[3] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95123 Catania, Italy

[4] Ctr Variable Energy Cyclotron, Div Theoret Phys, Kolkata 700064, India

来源：

PHYSICAL REVIEW D | 2014年 / 90卷 / 05期

基金：

巴西圣保罗研究基金会;

关键词：

HEAVY; COALESCENCE; COLLISIONS; MESONS; QUARKS;

D O I：

10.1103/PhysRevD.90.054018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The drag and diffusion coefficients of the Lambda(c)(2286 MeV) have been evaluated in the hadronic medium which is expected to be formed in the later stages of the evolving fireball produced in heavy ion collisions at RHIC and LHC energies. The interactions between the Lambda(c) and the hadrons in the medium have been derived from an effective hadronic Lagrangian, as well as from the scattering lengths obtained in the framework of heavy baryon chiral perturbation theory (HB chi PT). In both the approaches, the magnitude of the transport coefficients turn out to be significant. A larger value is obtained in the former approach with respect to the latter. Significant values of the coefficients indicate a substantial amount of interaction of the Lambda(c) with the hadronic thermal bath. Furthermore, the transport coefficients of the Lambda(c) are found to be different from the transport coefficients of the D meson. The present study indicates that the hadronic medium has a significant impact on the Lambda(c)/D ratio in heavy ion collisions.

引用

页数：6

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