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arXiv 0907.1374hep-ph
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LHC的软物理

Soft physics at the LHC

M. G. Ryskin, A. D. Martin, V. A. Khoze, A. G. Shuvaev

摘要:

我们回顾了用于理解LHC和更高能量的软相互作用的Regge方法的主要特征。幺正性抑制了质子-质子弹性散射振幅随能量的增长,导致高能质子-质子碰撞产生的次级粒子向更大的横动量迁移.我们讨论,在定性方面,包含大的快度差距(LRG)的过程中的作用,以及在额外的软相互作用产生的secondaries的差距生存人口的概率。我们解释了如何Regge图对应于一个LRG事件同时描述不同的事件(单,双等)。在同一快度区间内的粒子密度。我们表明,这些,增强,多坡密子图的作用,可以通过测量的多重性波动和长距离的快度在Tevatron和大型强子对撞机产生的秒之间的相关性进行研究。最后,我们列出了在Tevatron和LHC可获得的高能量下可以观察到的软相互作用的多Pomeron描述的特征。

英文摘要:

We recall the main features of the Regge approach used to understand soft interactions at LHC and higher energies. Unitarity tames the power growth of the elastic proton-proton scattering amplitude with energy, and leads to the migration of the secondary particles produced in high-energy proton-proton collisions to larger transverse momenta. We discuss, in qualitative terms, the role of processes containing large rapidity gaps (LRG), and the probability that the gaps survive population by secondaries produced in additional soft interactions. We explain how the Regge diagram corresponding to a LRG event simultaneously describes events with different (single, double, etc.) particle density in the same rapidity interval. We show that the role of these, enhanced, multi-Pomeron diagrams can be studied by measuring multiplicity fluctuations and long-range rapidity correlations between secondaries produced at the Tevatron and the LHC. Finally, we make a list of the characteristic features of the multi-Pomeron description of soft interactions that may be observed at the high energies accessible at the Tevatron and the LHC.

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