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Diffractive excitation in pp and pA collisions at high energies

机译：pp和pA碰撞中高能下的衍射激发

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摘要

In this paper, we consider the Good-Walker approach for the diffractive excitation and present an update of the Miettinen-Pumplin (MP) model for p p / p ˉ p collisions considering the recent LHC data for the total and elastic p p cross sections. The behavior of the total, elastic, and diffractive cross sections is analyzed, and predictions for the energies of Run 3 of the LHC and those of the cosmic ray experiments are derived. Our results demonstrate that the MP model is able to describe the current data, and that it implies that the cross section for the diffraction excitation in p p collisions is almost constant in the energy range probed by the LHC and slowly decreases at higher energies. Our results also indicate that the Pumplin bound is not reached at the LHC and cosmic ray energies. Moreover, the implications of the diffractive excitation in p A collisions are discussed. In particular, the MP model, constrained by the p p data, is used to derive the main quantities present in the treatment of the diffractive excitation in p A collisions. Predictions for the total, elastic, and diffractive p A cross sections are presented considering different nuclei. We demonstrate that the effect of fluctuations decreases at larger energies and heavier nuclei. The energy dependence of the diffractive excitation cross section in p A collisions is estimated for different nuclei and compared with the predictions for the proton dissociation induced by photon interactions.
机译：在本文中，我们考虑了衍射激励的Good-Walker方法，并考虑了最近LHC数据的总横截面和弹性p p横截面，提出了对p p / pˉp碰撞的Miettinen-Pumplin（MP）模型的更新。分析了总截面，弹性截面和衍射截面的行为，得出了LHC的运行3和宇宙射线实验的能量预测。我们的结果表明，MP模型能够描述当前数据，这表明在p p碰撞中用于衍射激发的横截面在LHC探测的能量范围内几乎是恒定的，而在较高的能量下会缓慢减小。我们的结果还表明，在LHC和宇宙射线能量处未达到Pumplin约束。此外，讨论了在p A碰撞中衍射激发的含义。特别地，受p p数据约束的MP模型用于导出p A碰撞中的衍射激发的处理中存在的主要量。考虑到不同的原子核，给出了总截面，弹性截面和衍射截面的预测。我们证明，在较大的能量和较重的原子核下，波动的影响减小。对于不同的原子核，估计了p A碰撞中衍射激发截面的能量依赖性，并将其与光子相互作用引起的质子离解的预测进行了比较。

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