Target mass and finite momentum transfer corrections to unpolarized and polarized diffractive scattering

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• 作者：Johannes Blü ; mlein ; Bodo Geyer and Dieter Robaschik
• 关键词：Diffractive scattering ; Target mass effects ; Finite momentum transfer corrections ; Twist decomposition ; Nonlocal light-cone operators ; Multivalued distribution amplitude ; Generalized Bjorken limit
• 刊名：Nuclear Physics B
• 出版年：2006
• 期刊代码：45_05503213
• 类别：ph
• 出版时间：30 October 2006
• 卷：755
• 期：1-3
• 页码：112-136
• 文件大小：287 K

摘要

A quantum field theoretic treatment of inclusive deep-inelastic diffractive scattering is given. The process can be described in the general framework of non-forward scattering processes using the light-cone expansion in the generalized Bjorken region. Target mass and finite t corrections of the diffractive hadronic tensor are derived at the level of the twist-2 contributions both for the unpolarized and the polarized case. They modify the expressions contributing in the limit t, M²→0 for larger values of β or/and t in the region of low Q². The different diffractive structure functions are expressed through integrals over the relative momentum of non-perturbative t-dependent 2-particle distribution functions. In the limit t, M²→0 these distribution functions are the diffractive parton distribution. Relations between the different diffractive structure functions are derived.