Universal behavior of charged particle production in heavy ion collisions at RHIC energies
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- 作者：Peter A. Steinberg PHOBOS collaboration ; B.B. Back ; M.D. Baker ; D.S. Barton ; R.R. Betts ; M. Ballintijn ; A.A. Bickley ; R. Bindel ; A. Budzanowski ; W. Busza ; A. Carroll ; M.P. Decowski ; E. Garcí ; a ; N. George ; K. Gulbr ; sen ; S. Gushue ; C. Halliwell ; J. Hamblen ; G.A. Heintzelman ; C. Henderson ; et a
- 刊名：Nuclear Physics B - Proceedings Supplements
- 出版年：2003
- 出版时间：April 2003
- 年：2003
- 卷：117
- 期：Supplement 1
- 页码：83-85
- 全文大小：449 K
文摘
The PHOBOS experiment at RHIC has measured the multiplicity of primary charged particles as a function of centrality and pseudorapidity in Au+Au collisions at √SNN = 19.6, 130 and 200 GeV. Two kinds of universal behavior are observed in charged particle production in heavy ion collisions. The first is that forward particle production, over a range of energies, follows a universal limiting curve with a non-trivial centrality dependence. The second arises from comparisons with and ep>+ p>ep>− p> data. Nch/Npart/2 in nuclear collisions at high energy scales with √s in a similar way as Nch in ep>+ p>ep>− p> collisions and has a very weak centrality dependence. This feature may be related to a reduction in the leading particle effect due to the multiple collisions suffered per participant in heavy ion collisions.