Proton-nucleus scattering and cross section fluctuations at RHIC and LHC
Proton-nucleus scattering and cross section fluctuations at RHIC and LHC
复制标题
RHIC 和 LHC 的质子核散射和截面波动
DOI：
10.1016/j.physletb.2005.11.065
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发表时间：
2005
影响因子：
4.4
通讯作者：
M. Strikman
中科院分区：
文献类型：
--
作者：
V. Guzey;M. Strikman
本文在Glauber-Gribov近似的框架内考虑了高能质子-重核散射，并考虑了截面涨落。利用已有的实验数据，固定了截面涨落模型的参数，对RHIC和LHC能区的质子-核总的、弹性的和相干的衍射解离截面进行了预测。我们预测了衍射解离的A依赖性从RHIC能区的A0.42到LHC能区的A0.27的强烈变化。在此基础上，讨论了相互作用接近黑体（么正性）极限的途径。我们估计了电磁场对相干pA衍射的贡献，发现在LHC运动学中，电磁场在重核靶上的相干衍射截面中起主导作用。
We consider high-energy proton–heavy nucleus scattering within the framework of the Glauber–Gribov approximation and taking into account cross section fluctuations. Fixing parameters of the model for cross section fluctuations by the available data, we make predictions for the total, elastic and coherent diffractive dissociation proton–nucleus cross sections for the RHIC and LHC energy range. We predict a strong change of the A-dependence of diffraction dissociation from A0.42at RHIC energies to A0.27at LHC energies. Based on the obtained results, we discuss the approach of the interactions to the black body (unitarity) limit. We estimate the electromagnetic contribution to coherent pA diffraction and find that it dominates the coherent diffractive cross section on heavy nuclear targets in the LHC kinematics.