中文

深度虚康普顿散射振幅的次领头阶QCD分析

高能物理 - 唯象学 2009-11-07 v3

摘要

我们提出了在MSˉ\bar{MS}方案下,针对两种不同输入情景,对非极化和极化深度虚康普顿散射(DVCS)振幅进行次领头阶(NLO)QCD分析。我们说明并讨论了NLO效应的大小以及振幅在斜度ζ\zeta和光子虚度Q2Q^2下的行为。在非极化情况下,在固定Q2Q^2时,我们发现振幅在ζ\zeta上表现出显著的等效幂律行为,类似于Regge因子化,跨越ζ\zeta的多个数量级。我们还量化了DVCS振幅实部与虚部的比值及其对因子化标度变化的敏感性。

关键词

引用

@article{arxiv.hep-ph/0106319,
  title  = {A next-to-leading order QCD analysis of deeply virtual Compton scattering amplitudes},
  author = {A. Freund and M. F. McDermott},
  journal= {arXiv preprint arXiv:hep-ph/0106319},
  year   = {2009}
}

备注

12 pages, 12 figures, revtex, final version to be published in Phys. Rev. D. Corrected error in MRSA' distribution and modified extraplation behavior of GRSV00 distribution. Corrected error in +i\epsilon treatment. Taking now correct sheaf of log. Errors in subtraction equations corrected. Figures and results for affected imaginary part of NLO amplitude changed accordingly