Production of pentaquark Θ + baryons in central relativistic heavy ion collisions is studied in a kinetic model. Assuming that a quark-gluon plasma is produced in the collisions, we first determine the number of Θ + produced from the quark-gluon plasma using a parton coalescence model, and then take into consideration its production and absorption in subsequent hadronic matter via the reactions KN↔Θ, KN↔πΘ and πN↔K̄Θ. We find that although the final Θ + number is affected by hadronic interactions, it remains sensitive to the initial number of Θ + produced from the quark-gluon plasma, particularly in the case of a small Θ + width as imposed by the K +N and K +d scattering data. Because of small baryon chemical potential in the hot dense matter produced in these collisions, the number of produced anti-Θ is only slightly smaller than that of Θ +.
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2004 Nov 4|
Bibliographical noteFunding Information:
We thank Berndt Müller and Jorgen Randrup for comments on an earlier version of this Letter. This Letter was based on work supported in part by the US National Science Foundation under Grant No. PHY-0098805 and the Welch Foundation under Grant No. A-1358. V.G. was further supported by the National Institute of Nuclear Physics (INFN) in Italy, while L.-W.C. by the National Science Foundation of China under Grant No. 10105008 and S.H.L. by the Korean Research Foundation under Grant No. KRF-2002-015-CP0074.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics