Perturbative QCD correlations in multi-parton collisions
Perturbative QCD correlations in multi-parton collisions
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DOI：
10.1140/epjc/s10052-014-2926-z
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发表时间：
2014-06-17
影响因子：
4.4
通讯作者：
Strikman, M.
中科院分区：
文献类型：
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作者：
Blok, B.;Dokshitzer, Yu.;Strikman, M.
我们研究了由微扰QCD部分子分裂产生的部分子-部分子关联在双部分子相互作用（DPI）中所起的作用。还提出了在Tevatron和LHC能量的积分DPI截面的数值分析的结果。为了得到数值结果，利用HERA实验获得的单部分子GPD的知识构造了广义双部分子分布的非微扰输入。由三部分子相互作用引起的微扰两部分子相关性显著有助于解决Tevatron观察到的背靠背运动学中的多喷流产生事件的长期难题。
We examine the role played in double-parton interactions (DPI) by the parton-parton correlations originating from perturbative QCD parton splittings. Also presented are the results of the numerical analysis of the integrated DPI cross sections at Tevatron and LHC energies. To obtain the numerical results the knowledge of the single-parton GPDs gained by the HERA experiments was used to construct the non-perturbative input for generalized double-parton distributions. The perturbative two-parton correlations induced by three-parton interactions contribute significantly to a resolution of the longstanding puzzle of an excess of multi-jet production events in the back-to-back kinematics observed at the Tevatron.