STUDYING DIQUARK STRUCTURE OF HEAVY BARYONS IN RELATIVISTIC HEAVY ION COLLISIONS

被引：0

作者：

Yasui, S. ^{[1
,2
]}

Lee, S. H. ^{[1
]}

Ohnishi, K. ^{[1
]}

Loo, I-K. ^{[3
]}

Ko, C. M. ^{[4
,5
]}

机构：

[1] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea

[2] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

[3] Pusan Natl Univ, Pusan 609735, South Korea

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

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

来源：

MODERN PHYSICS LETTERS A | 2008年 / 23卷 / 27-30期

关键词：

Relativistic heavy ion collisions; quark-gluon plasma; diquark; quark coalescence; heavy baryons;

D O I：

10.1142/S0217732308029149

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose the enhancement of Lambda(c) yield in heavy ion collisions at RHIC and LHC as a novel signal for the existence of diquarks in the strongly coupled quark-gluon plasma produced in these collisions as well as in the Lambda(c). Assuming that stable bound diquarks can exist in the quark-gluon plasma, we argue that the yield of Lambda(c) would be increased by two-body collisions between [ud] diquarks and c quarks, in addition to normal three-body collisions among u,d and c quarks. A quantitative study of this effect based on the coalescence model shows that including the contribution of diquarks to Lambda(c) production indeed leads to a substantial enhancement of the Lambda D-c/ ratio in heavy ion collisions.

引用

页码：2254 / 2258

页数：5

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