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arXiv 1401.7746hep-ph
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高能夸克（电子）质子周边碰撞中重夸克对（轻子对）和双胶子（双光子）的产生过程

Processes of heavy quark pair (lepton pair) and two gluon (two photon) production in the high energy quark (electron) proton peripheral collisions

Azad I. Ahmadov, Eduard A. Kuraev

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25 pages, 4 figures, 5 tables
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摘要：

我们考虑了入射轻子、光子、夸克和胶子碎裂区域的三种喷注产生过程。第四个喷流是由反冲质子产生的。对破碎区射流产生的运动学进行了讨论。导出了反冲质子动量与发射极角之间的非平凡关系。在此基础上，得到了QCD过程$gp \to (ggg) p; \,\,\,qp \to (q \bar{Q} Q) p; \,\,\, gp \to (g Q \bar{Q})p$的微分截面，包括喷注碎片的横向动量分量的分布。结果表明，“非阿贝尔”性质的贡献的作用可能会成为主导在一个特定的运动学的最终粒子。在重夸克-反夸克对产生的情况下，考虑了初始粒子改变运动方向的运动学。不同的分布，包括光谱，方位角和极角分布的射流碎片可以安排使用我们的结果。此外，我们提出的非阿贝尔贡献的截面的总贡献的比例的行为。我们表明，它占主导地位的射流组件（胶子或夸克）的横向动量的大值。对周边过程的横截面作了一些历史性的介绍，包括2个$γ$产生机制的产生，包括Brodsky-Kinoshita-Terazawa的结果。

英文摘要：

We considered the three jet production processes in the region of the incident lepton, photon, quark or gluon fragmentation. The fourth jet is created by the recoil proton. The kinematics of jet production is discussed in jets production in the fragmentation region. The non-trivial relation between the momenta of the recoil proton and the polar angle of its emission was derived. Based on this formalism the differential cross sections of QCD processes $gp \to (ggg) p; \,\,\,qp \to (q \bar{Q} Q) p; \,\,\, gp \to (g Q \bar{Q})p$ were obtained, including the distribution on transverse momentum component of jets fragments. It was shown that the role of the contribution of "non-Abelian" nature may become dominant in a particular kinematics of the final particles. The kinematics, in which the initial particle changes the direction of movement to the opposite one, was considered in the case of heavy quark-antiquark pair production. Different distributions, including spectral, azimuthal and polar angle distribution on the fragments of jets can be arranged using our results. We present besides the behavior of the ratio of non-Abelian contribution to the cross section to the total contribution. We show that it dominates for large values of the transverse momenta of jets component (gluons or quarks). Some historical introduction to the cross-sections of peripheral processes, including 2$γ$ creation mechanism production, including the result Brodsky-Kinoshita-Terazawa, is given.

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