Pentaquark baryon production at the relativistic heavy ion collider
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Production of pentaquark + 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 + 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, KN and NK. We find that although the final + number is affected by hadronic interactions, it remains sensitive to the initial number of + produced from the quark-gluon plasma, particularly in the case of a small + 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- is only slightly smaller than that of +. 2004 Elsevier B.V. All rights reserved.