Transverse parton distribution functions at next-to-next-to-leading order: the quark-to-quark case

Abstract

We present a calculation of the perturbative quark-to-quark transverse parton distribution function at next-to-next-to-leading order based on a gauge invariant operator definition. We demonstrate for the first time that such a definition works beyond the first non-trivial order. We extract from our calculation the coefficient functions relevant for a next-to-next-to-next-to-leading logarithmic $Q_T$ resummation in a large class of processes at hadron colliders.

4 pages, 1 figure, revised version, accepted for publication in PRL

References in corpus (2)

• Drell-Yan production at small q_T, transverse parton distributions and the collinear anomaly
• Vector boson production at hadron colliders: hard-collinear coefficients at the NNLO

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