ar X iv : 0 70 6 . 11 93 v 1 [ he p - ph ] 8 J un 2 00 7 Are generalized and transverse momentum dependent parton distributions related ?
نویسنده
چکیده
During the last decade a lot of effort has been devoted to study in detail generalized parton distributions (GPDs) as well as transverse momentum dependent parton distributions (TMDs). While GPDs enter the QCD description of hard exclusive reactions on the nucleon, TMDs appear in connection with various semi-inclusive processes. Recent work has suggested for the first time very interesting non-trivial relations between these two types of parton distributions [1, 2, 3, 4, 5, 6, 7]. The present short note [8] is based on Ref. [7], where the current knowledge on such relations has been reviewed and previous work on this topic has been considerably extended. To be specific now, two leading twist quark GPDs of the nucleon are defined through
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تاریخ انتشار 2008