arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.6572hep-phhep-ex
收藏

双强子电产生中的Sivers效应

Sivers Effect in Dihadron Electroproduction

Aram Kotzinian, Hrayr H. Matevosyan, Anthony W. Thomas

摘要:

极化SIDIS中的Sivers效应可以在两个强子产生中作为涉及强子对的总横动量和相对横动量的方位角$φ_T$和$φ_R$的正弦调制来测量,与传统的单强子研究互补。在这次演讲中,我们简要介绍了我们最近的工作[1]和[2]中获得的结果。我们还给出了两个强子SIDIS截面的首阶部分子模型表达式,给出了相对横动量的不同选择,消除了我们的结果与以前工作的矛盾。最后,我们给出了相应的单自旋不对称性的COMPASS实验的运动学中使用的修改版本的$\tt{LEPTO}$蒙特卡罗事件发生器,包括Sivers效应的数值预测。

英文摘要:

The Sivers effect in polarized SIDIS can be measured in two hadron production as sine modulations involving the azimuthal angles $φ_T$ and $φ_R$ of both the total and the relative transverse momenta of the hadron pair, complementary to the conventional single hadron studies. In this talk we briefly present the results obtained in our recent work [1] and [2]. We also present the leading order parton model expression for the two hadron SIDIS cross section for different choices of the relative transverse momentum that dismiss the seeming contradiction of our results with previous work. Finally, we show the numerical predictions for the corresponding single spin asymmetries in the kinematics of COMPASS experiment obtained using the modified version of the $\tt{LEPTO}$ Monte Carlo event generator that includes the Sivers effect.

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。

↑