Chiral Dynamics for Exotic HadronsNo Access

STUDYING DIQUARK STRUCTURE OF HEAVY BARYONS IN RELATIVISTIC HEAVY ION COLLISIONS

S. YASUI

Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Republic of Korea

Department of Physics, National Taiwan University, Taipei, 106, Taiwan

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S. H. LEE

Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Republic of Korea

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K. OHNISHI

Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Republic of Korea

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I.-K. YOO

Pusan National University, Pusan 609-735, Republic of Korea

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, and

C. M. KO

Cyclotron Institute and Physics Department, Texas A&M University, College Station, TX 77843, USA

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https://doi.org/10.1142/S0217732308029149Cited by:0 (Source: Crossref)

Abstract

We propose the enhancement of Λ_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 Λ_c. Assuming that stable bound diquarks can exist in the quark-gluon plasma, we argue that the yield of Λ_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 Λ_c production indeed leads to a substantial enhancement of the Λ_c/D ratio in heavy ion collisions.

Keywords:

PACS: 12.38.Mh, 14.20.Lq, 12.38.Qk

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STUDYING DIQUARK STRUCTURE OF HEAVY BARYONS IN RELATIVISTIC HEAVY ION COLLISIONS

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