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arXiv 2603.09686hep-ph
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探测双喷注Exclusive电生产中的GPDs

Probing GPDs in exclusive electroproduction of dijets

Doctoral School, Institute of Physical Sciences, University of Rzeszów(热舒夫大学物理科学学院博士学院);Institute of Physical Sciences, University of Rzeszów(热舒夫大学物理科学学院);Institute of Nuclear Physics, Polish Academy of Sciences(波兰科学院核物理研究所)

Trambak Jyoti Chall, Marta Łuszczak, Wolfgang Schäfer, Antoni Szczurek

AI总结:

本文通过胶子分布和海夸克分布计算了双喷注电生产中的GPDs,展示了不同分布对横截面微分分布的影响,并探讨了未来电子离子对撞机中可能的测量应用。

摘要:

我们总结了在collinear QCD因子化中计算e p → e′ jj p双喷注生产形式的正式方法,使用广义部分子分布作为软强子输入模型,在双分布方法中进行建模。我们包括了来自轻海夸克和轻价夸克交换以及胶子交换的所有一阶贡献,对于轻夸克-反夸克(q q̄)生产和重c c̄最终态。我们为几种微分分布提供了结果,评估了横截面在广大的相空间区域内的值,覆盖了广泛的不弹性以及光子虚序范围。胶子和海贡献表现出相似的形状,而价贡献尽管相对较小,但表现出明显不同的行为。后者在大的x_P区域特别明显,这是一个在HERA未探索的动量区域,但可能在未来电子离子对撞机的测量中被探索。这需要进一步的可行性研究。我们还提出了轻子和出射双喷注平面之间的方位角调制,对于一般情况以及ZEUS动量区域,我们看到与散射参数β>0.4的数据有合理的符合。

英文摘要:

We summarize the formalism for calculating the exclusive dijet production in $e p \to e^{\prime} jj p$ in collinear QCD factorization, using generalized parton distributions as the soft hadronic input modeled in the double distribution approach. We include all leading-order contributions coming from light sea and valence quark exchanges, and gluon exchanges for both light quark-antiquark ($q\bar{q}$) production and also the heavy $c\bar{c}$ final state. We present results for several differential distributions for the cross section evaluated over a broad region of phase space, covering a wide range of inelasticity and photon virtuality. The gluon and sea contributions exhibit similar shapes, whereas the valence contribution, though relatively small, shows a markedly different behavior. The latter becomes particularly noticeable at large $x_{\mathbb{P}}$, a kinematic region not explored at HERA, but potentially accessible in future measurements at the Electron Ion Collider. This requires further feasibility studies. We also present the azimuthal angle modulation between the leptonic and the outgoing dijet planes for the general case, as well as for the ZEUS kinematic region where we see reasonable agreement with the data for diffractive deep inelastic scattering parameter $β\gtrsim 0.4$.

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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