Quark-gluon plasma formation in the central rapidity region and finite size effects of colliding nuclei

Abstract

The energy density of the central products in the ultra-relativistic heavy ion collisions are calculated. In our estimation, the special attention is paid to the space-time extension of the emission points of the secondary hadrons which are originated in the successive nucleon-nucleon interactions within the finite size of colliding nuclei. The average collision number per produced *On leave of absence from Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo 188. iv particle, in the final state interaction. is also calculated and is used as a criterion whether the system is thermalized or not. It turns out that the attainable energy density in the central heavy ion collision is sensitive to the space-time extension of the emission points. However, if the incident energy and the mass numbers of colliding nuclei are high and large, we can get high enough energy density for the phase transition from a hadronic state to a quark-gluon plasma state.

Dimuon and Diphoton Emission from Quark-Gluon Plasma in High-Energy Heavy-Ion Collisions: Effects of Longitudinal Flow

“…(2 -16),(2 -17) and(2 -7).) If the QGP is not created in the UHIC, the energy-to-O distribution reduces to the form of Eq (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). in terms of C1 and C2.…”