Transverse-momentum distribution of 's in Pb-Pb collisions and gluon rescatteringP. Zhuang1 and J. Hüfner2
1 Physics Department, Tsinghua University, Beijing 100084, PRC
2 Institute for Theoretical Physics, University of Heidelberg, D-69120 Heidelberg, Germany
(Received: 27 September 2001 / Revised version: 7 July 2002 / Published online: 17 January 2003)
We study anomalous suppression and broadening in the model of prompt gluons. The anomalous suppression can be successfully described in this model. The transverse-momentum dependence of suppression in relativistic heavy-ion collisions is calculated from initial-state gluon rescattering with both nucleons and prompt gluons produced in nucleon-nucleon collisions in the early phase of the reaction. It seems impossible to describe simultaneously anomalous suppression and broadening in Pb-Pb collisions within the model of prompt gluons with reasonable values of the parameters.
25.75.-q - Relativistic heavy-ion collisions.
12.38.Mh - Quark-gluon plasma.
© Società Italiana di Fisica, Springer-Verlag 2003