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arXiv 0908.0251hep-ph
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质子-质子散射中具有关联的多重硬部分子碰撞

Multiple Hard Partonic Collisions with Correlations in Proton-Proton Scattering

T. C. Rogers, M. Strikman

摘要:

本文提出了一种简单的方法,将关联性引入到高能强子-强子散射中多(半)硬部分子碰撞的碰撞参量空间描述中。微扰QCD输入是具有较低横动量截止的包含双射产生的标准因式分解定理。硬部分子横向分布的宽度由双胶子形状因子的参数化确定。然后,我们重建的硬贡献的总非弹性剖面函数,并获得校正由于更常用的程函描述的相关性。双相关修正的大小的估计是基于在Tevatron测量的双碰撞率。我们发现,如果典型的值较低的横向动量截止的计算中使用的包容性硬dijet截面,那么相关修正是必要的,以保持一致的预期总非弹性质子-质子截面在LHC能量。

英文摘要:

We propose a simple method for incorporating correlations into the impact parameter space description of multiple (semi-)hard partonic collisions in high energy hadron-hadron scattering. The perturbative QCD input is the standard factorization theorem for inclusive dijet production with a lower cutoff on transverse momentum. The width of the transverse distribution of hard partons is fixed by parameterizations of the two-gluon form factor. We then reconstruct the hard contribution to the total inelastic profile function and obtain corrections due to correlations to the more commonly used eikonal description. Estimates of the size of double correlation corrections are based on the rate of double collisions measured at the Tevatron. We find that, if typical values for the lower transverse momentum cutoff are used in the calculation of the inclusive hard dijet cross section, then the correlation corrections are necessary for maintaining consistency with expectations for the total inelastic proton-proton cross section at LHC energies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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