Mid-rapidity protons in 158A·GeV Pb+Pb collisions
Mid-rapidity protons in 158A·GeV Pb+Pb collisions
复制标题
158A·GeV Pb+Pb 碰撞中的中快质子
DOI：
10.1016/s0370-2693(96)01249-x
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发表时间：
1996
影响因子：
4.4
通讯作者：
D. Zachary
中科院分区：
文献类型：
--
作者：
I. Bearden;H. Boggild;J. Boissevain;J. Dodd;B. Erazmus;S. Esumi;C. Fabjan;D. Ferenc;D. Fields;A. Franz;J. Gaardhøje;O. Hansen;D. Hardtke;H. Hecke;E. Holzer;T. Humanic;P. Hummel;B. Jacak;R. Jayanti;M. Kaneta;M. Kopytine;M. Leltchouk;T. Ljubičić;B. Lörstad;N. Maeda;A. Medvedev;M. Murray;S. Nishimura;H. Ohnishi;G. Paic;S. Pandey;F. Piuz;J. Pluta;V. Polychronakos;M. Potekhin;G. Poulard;A. Sakaguchi;J. Simon;J. Schmidt;W. Sondheim;M. Spegel;T. Sugitate;J. Sullivan;Y. Sumi;W. Willis;K. Wolf;N. Xu;D. Zachary
在CERN的聚焦谱仪实验NA44中，测量了158A·GeV Pb+Pb碰撞中快度（2 ≤ y ≤ 3）质子的分布。从重子数守恒出发，通过与输运模型RQMD比较实验测得的d N dy分布，我们得出结论：在这些能量下，真正的重离子碰撞已经达到了相当高的核阻止.横向质量分布表现出特有的热形状和斜率参数的碰撞系统的质量增加。
Proton distributions at mid-rapidity (2 ≤ y ≤ 3) have been measured for 158A·GeV Pb+Pb collisions in the focusing spectrometer experiment NA44 at CERN. From baryon number conservation and by comparing the experimentally measured d N d y distribution with the transport model RQMD, we conclude that a rather high degree of nuclear stopping has been reached for the truly heavy-ion collisions at these energies. Transverse mass distributions exhibit characteristically thermal shapes and the slope parameters increase with the mass of the colliding system.