Proper definition and evolution of generalized transverse momentum dependent distributions
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Journal ArticleDate
2016-08-10Author
Echevarria, MGIdilbi, A
Kanazawa, K
Lorcé, C
Metz, A
Pasquini, B
Schlegel, M
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http://hdl.handle.net/20.500.12613/5036
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10.1016/j.physletb.2016.05.086Abstract
© 2016 The Author(s). We consider one of the most fundamental sets of hadronic matrix elements, namely the generalized transverse momentum dependent distributions (GTMDs), and argue that their existing definitions lack proper evolution properties. By exploiting the similarity of GTMDs with the much better understood transverse momentum distributions, we argue that the existing definitions of GTMDs have to include an additional dependence on soft gluon radiation in order to render them properly defined. With this, we manage to obtain the evolution kernel of all (un)polarized quark and gluon GTMDs, which turns out to be spin independent. As a byproduct, all large logarithms can be resummed up to next-to-next-to-leading-logarithmic accuracy with the currently known perturbative ingredients.Citation to related work
Elsevier BVHas part
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy PhysicsADA compliance
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http://dx.doi.org/10.34944/dspace/5018
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