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arXiv 0911.5348hep-phhep-ex
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大型强子对撞机上双部分子散射的特征和估计

Characteristics and Estimates of Double Parton Scattering at the Large Hadron Collider

Edmond L. Berger, C. B. Jackson, Gabe Shaughnessy

摘要:

我们评估的运动学分布在相空间中的4-部分子最终状态子过程产生的双部分子散射,我们对比这些与最终状态分布,起源于传统的单部分子散射。我们的目标是建立不同的拓扑结构的事件,从这两个来源,并提供一种方法,实验测定的相对大小的双部分子和单部分子的贡献在大型强子对撞机的能量。我们详细研究了两种情况,$b \bar{b} \rm{jet jet}$和4喷流的最终状态。经过完整的部分子级模拟,我们确定了几个变量,分开的两个贡献非常好,我们建议使用实验的相对截面的经验测量。我们表明,双部分子贡献下降明显更迅速地与领先的射流的横向动量,但,相对归一化的问题,可能是占主导地位的,在适度的值,这种横向动量。

英文摘要:

We evaluate the kinematic distributions in phase space of 4-parton final-state subprocesses produced by double parton scattering, and we contrast these with the final-state distributions that originate from conventional single parton scattering. Our goal is to establish the distinct topologies of events that arise from these two sources and to provide a methodology for experimental determination of the relative magnitude of the double parton and single parton contributions at Large Hadron Collider energies. We examine two cases in detail, the $b \bar{b} \rm{jet jet}$ and the 4 jet final states. After full parton-level simulations, we identify a few variables that separate the two contributions remarkably well, and we suggest their use experimentally for an empirical measurement of the relative cross section. We show that the double parton contribution falls off significantly more rapidly with the transverse momentum of the leading jet, but, up to issues of the relative normalization, may be dominant at modest values of this transverse momentum.

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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