Exclusive muon-pair production in ultrarelativistic heavy-ion collisions: Realistic nucleus charge form factor and differential distributions
Exclusive muon-pair production in ultrarelativistic heavy-ion collisions: Realistic nucleus charge form factor and differential distributions
复制标题
DOI：
10.1103/physrevc.82.014904
复制
发表时间：
2010-04
影响因子：
3.1
通讯作者：
M. Kłusek-Gawenda;A. Szczurek
中科院分区：
文献类型：
--
作者：
M. Kłusek-Gawenda;A. Szczurek
计算了核-核碰撞中μ子对的排斥产生截面，并给出了几种微分分布。现实的（傅立叶变换的电荷密度）的核电荷形状因子的使用和相应的结果进行了比较与截面计算的形状因子经常在文献中使用，最近讨论的高阶QED修正的背景下。吸收效果进行了讨论和量化。采用实际形状因子获得的横截面明显小于采用非理想形状因子获得的横截面。大μ子快度和/或大μ子横动量的影响更大。给出了RHIC上星星和PHENIX合作测量以及LHC上ALICE和CMS合作测量的预言。
The cross sections for exclusive muon-pair production in nucleus-nucleus collisions are calculated and several differential distributions are shown. Realistic (Fourier transform of charge density) charge form factors of nuclei are used and the corresponding results are compared with the cross sections calculated with monopole form factor often used in the literature and discussed recently in the context of higher-order QED corrections. Absorption effects are discussed and quantified. The cross sections obtained with realistic form factors are significantly smaller than those obtained with the monopole form factor. The effect is bigger for large muon rapidities and/or large muon transverse momenta. The predictions for the STAR and PHENIX collaboration measurements at RHIC as well as the ALICE and CMS collaborations at LHC are presented.