Scaling behavior of (Nch)⁻¹dNch/dη at √sNN = 130 GeV by PHOBOS Collaboration and its analyses in terms of stochastic approach

الأصل · EN

Recently interesting data on dNch/dη in Au-Au collisions (η=- (θ/2)) with the centrality cuts have been reported by PHOBOS Collaboration. Their data are usually divided by the number of participants (nucleons) in collisions. Instead of this way, using the total multiplicity Nch = ∫ (dNch/dη)dη, we find that there is scaling phenomenon among (Nch)⁻¹dNch/dη= dn/dη with different centrality cuts at √sNN = 130 GeV. To explain this scaling behavior of dn/dη, we consider the stochastic approach called the Ornstein-Uhlenbeck process with two sources. Moreover, comparisons of dn/dη at √sNN = 130 GeV with that at √sNN = 200 GeV have been made. A possible detection method of the quark-gluon plasma (QGP) thorough dn/dη is presented.