中心金离子与金离子碰撞中粒子多重性的能量依赖性。

Energy dependence of particle multiplicities in central Au+Au collisions.

作者信息

Back B B, Baker M D, Barton D S, Betts R R, Bindel R, Budzanowski A, Busza W, Carroll A, Corbo J, Decowski M P, Garcia E, George N, Gulbrandsen K, Gushue S, Halliwell C, Hamblen J, Henderson C, Hicks D, Hofman D, Hollis R S, Hołyński R, Holzman B, Iordanova A, Johnson E, Kane J, Katzy J, Khan N, Kucewicz W, Kulinich P, Kuo C M, Lin W T, Manly S, McLeod D, Michałowski J, Mignerey A, Mülmenstädt J, Nouicer R, Olszewski A, Pak R, Park I C, Pernegger H, Rafelski M, Rbeiz M, Reed C, Remsberg L P, Reuter M, Roland C, Roland G, Rosenberg L, Sagerer J, Sarin P, Sawicki P, Skulski W, Steadman S G, Steinberg P, Stephans G S F, Stodulski M, Sukhanov A, Tang J-L, Teng R, Trzupek A, Vale C, van Nieuwenhuizen G J, Verdier R, Wadsworth B, Wolfs F L H, Wosiek B, Woźniak K, Wuosmaa A H, Wysłouch B

机构信息

Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA.

出版信息

Phys Rev Lett. 2002 Jan 14;88(2):022302. doi: 10.1103/PhysRevLett.88.022302. Epub 2001 Dec 27.

DOI:10.1103/PhysRevLett.88.022302

PMID:11801006

Abstract

We present the first measurement of the pseudorapidity density of primary charged particles in Au+Au collisions at root square[s(NN)] = 200 GeV. For the 6% most central collisions, we obtain dN(ch)/d(eta)/(/eta/<1) = 650+/-35(syst). Compared to collisions at root square[s(NN)] = 130 GeV, the highest energy studied previously, an increase by a factor of 1.14+/-0.05 at 90% confidence level, is found. The energy dependence of the pseudorapidity density is discussed in comparison with data from proton-induced collisions and theoretical predictions.

摘要

我们展示了在质心能量平方根√[s(NN)] = 200 GeV的金离子与金离子碰撞中，对原初带电粒子的赝快度密度的首次测量。对于6%最中心的碰撞，我们得到dN(ch)/d(η)/(|η|<1) = 650±35（系统误差）。与之前研究的最高能量——质心能量平方根√[s(NN)] = 130 GeV的碰撞相比，发现在90%置信水平下增加了1.14±0.05倍。将赝快度密度的能量依赖性与质子引发碰撞的数据及理论预测进行了比较讨论。