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arXiv 0901.2798hep-ph
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p \bar{p}碰撞中小Q_T Drell-Yan对产生的双横自旋不对称性

Double Transverse-Spin Asymmetries for Small-Q_T Drell-Yan Pair Production in p\bar{p} Collisions

Hiroyuki Kawamura, Kazuhiro Tanaka

摘要:

本文讨论了横向极化Drell-Yan过程中的双自旋不对称性,计算了各阶胶子重混修正,其精度达到了次领先的对数精度。当所产生的轻子对的横动量$Q_T$很小时,这种再确认是相关的,并且在对$Q_T$积分时,再现了(固定阶)次领先的QCD修正。与$pp$碰撞情况相比,$p\bar{p}$碰撞中的再膨胀修正表现不同,并且在建议的GSI实验中在运动学上是小的。这一事实使我们能够预测大值的双自旋不对称性在GSI,使用最近的经验信息的横向。

英文摘要:

We discuss the double-spin asymmetries in transversely polarized Drell-Yan process, calculating all-order gluon resummation corrections up to the next-to-leading logarithmic accuracy. This resummation is relevant when the transverse-momentum $Q_T$ of the produced lepton pair is small, and reproduces the (fixed-order) next-to-leading QCD corrections upon integrating over $Q_T$. The resummation corrections in $p\bar{p}$-collision behave differently compared with $pp$-collision cases, and are small at the kinematics in the proposed GSI experiments. This fact allows us to predict large value of the double-spin asymmetries at GSI, using recent empirical information on the transversity.

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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