arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1401.7621hep-ph
收藏

达到扭曲4精度的深虚康普顿散射：有限- $t$和目标质量修正的影响

Deeply Virtual Compton Scattering to the twist-four accuracy: Impact of finite-$t$ and target mass corrections

Vladimir M. Braun, Alexander N. Manashov, Dieter Mueller, Bjoern M. Pirnay

备注：
34 pages, 11 figures, 1 table
发表信息：
Phys. Rev. D 89, 074022 (2014)
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

首次对深虚康普顿散射中几个关键观测量进行了运动学功率修正$\sim t/Q^2$和$\sim m^2/Q^2$的完整计算。详细讨论了首扭近似的常规依赖性问题。此外，我们工作的双分布，梅林-巴恩斯积分和耗散框架内的更高的扭曲修正的表示。这项研究消除了一个重要的来源的不确定性，在QCD预测的中间光子虚拟$Q^2\sim 1$ - $5\,{\rm GeV}^2$，是在现有的和计划中的实验。特别是有限- $t$校正是重要的，必须在数据分析中考虑。

英文摘要：

We carry out the first complete calculation of kinematic power corrections $\sim t/Q^2$ and $\sim m^2/Q^2$ to several key observables in Deeply Virtual Compton Scattering. The issue of convention dependence of the leading twist approximation is discussed in detail. In addition we work out representations for the higher twist corrections in terms of double distributions, Mellin-Barnes integrals and also within a dissipative framework. This study removes an important source of uncertainties in the QCD predictions for intermediate photon virtualities $Q^2\sim 1$-$5\,{\rm GeV}^2$ that are accessible in the existing and planned experiments. In particular the finite-$t$ corrections are significant and must be taken into account in the data analysis.

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。

↑