arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.0781hep-ph
收藏

(半)包容DIS中的双光子交换

Two-Photon Exchange in (Semi-)Inclusive DIS

M. Schlegel, A. Metz

摘要:

在本文中,我们考虑了双光子交换(TPE)在包容DIS和半包容DIS(SIDIS)中的影响。特别是,横向单自旋不对称性产生的包容DIS,如果一个以上的光子之间交换的轻子和强子。我们简要地总结了部分子模型中DIS中的TPE,并将我们的方法扩展到SIDIS,在SIDIS中出现了一个新的主导扭转$\sin(2ϕ)$对纵向束自旋不对称性的贡献。SIDIS中Sivers和Collins不对称性的可能TPE效应被功率抑制。

英文摘要:

In this note we consider effects of a Two-Photon Exchange (TPE) in inclusive DIS and semi-inclusive DIS (SIDIS). In particular, transverse single spin asymmetries are generated in inclusive DIS if more than one photon is exchanged between the lepton and the hadron. We briefly summarize the TPE in DIS in the parton model and extend our approach to SIDIS, where a new leading twist $\sin(2ϕ)$ contribution to the longitudinal beam spin asymmetry shows up. Possible TPE effects for the Sivers and the Collins asymmetries in SIDIS are power-suppressed.

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。

↑