论文标题
在裂缝引起的drell-yan工艺中的glauber glu弹
Glauber gluons in pion-induced Drell-Yan processes revisited
论文作者
论文摘要
我们通过考虑到$ k_t $ cresisization定理中的glauber gluon效应，重新分析了在斜向诱导的drell-yan过程中产生的轻顿对异常的角度分布。与先前的研究相比，我们采用了来自CTEQ的质子和Xfitter的质子的逼真的Parton分布函数（PDF），包括强耦合和PDF的QCD演变，并整合了NA10，E615和Coss Excoss和Coss的差异区域的差分横截面。然后，这些改进允许与数据进行严格的理论结果对抗。结果表明，在上述所有实验中测得的Lepton角分布和违反LAM-TUNG关系的违规可以通过单个Glauber相位良好。我们为Drell-Yan过程的几何图片中的Glauber效应及其与常规的Boer-Mulders机制的区别。指出可观察到的东西，当数据变得更加精确时，可以用来区分这两个建议。
We reanalyze the anomalous angular distribution of lepton pairs produced in a pion-induced Drell-Yan process by taking into account the Glauber gluon effect in the $k_T$ factorization theorem. Compared to the previous study, we adopt the realistic parton distribution functions (PDFs) for a proton from the CTEQ and for a pion from the xFitter, include the QCD evolutions of the strong coupling and the PDFs, and integrate the differential cross section over the kinematic regions for the NA10, E615 and COMPASS experiments. These improvements then allow rigorous confrontations of theoretical results with the data. It is shown that the lepton angular distribution and the violation of the Lam-Tung relation measured in all the above experiments can be well accommodated with a single Glauber phase. We illustrate the Glauber effect in the geometric picture for a Drell-Yan process, and its distinction from the conventional Boer-Mulders mechanism. The observables are pointed out, which can be used to discriminate the two proposals, when data become more precise.
