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High Energy Physics - Phenomenology

arXiv:1610.08273 (hep-ph)
[Submitted on 26 Oct 2016]

Title:Gluon TMDs in the small-$x$ limit

Authors:Tom van Daal
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Abstract:In high-energy scattering processes involving two or more hadrons one can measure observables that are sensitive to partonic transverse momentum, which is encoded in so-called transverse momentum dependent (TMD) parton distribution functions (PDFs), also called TMDs. These functions correspond to Fourier transforms of matrix elements that contain process-dependent gauge links. As the energy associated to the collision process increases, one becomes more sensitive to the small-$x$ region which is dominated by gluon rather than quark TMDs. In this paper we study the leading-twist gluon TMDs in the small-$x$ limit for the dipole-type gauge link structure, for both unpolarized and vector polarized hadrons. In the limit $x\to0$, the gluon-gluon correlator reduces to a correlator that consists of a single Wilson loop. This is used to obtain a simple description of gluon TMDs in the small-$x$ region: some of the functions vanish, while others become proportional to each other.
Comments: Proceedings of QCD Evolution 2016, 7 pages
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1610.08273 [hep-ph]
  (or arXiv:1610.08273v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1610.08273

Submission history

From: Tom van Daal [view email]
[v1] Wed, 26 Oct 2016 10:37:36 UTC (80 KB)
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