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May 20 – 24, 2018
Drury Plaza Hotel
US/Mountain timezone

Twist-2 transverse momentum distributions at NNLO in QCD

May 24, 2018, 11:30 AM
O'Keefe Ballroom (Drury Plaza Hotel)

O'Keefe Ballroom

Drury Plaza Hotel

828 Paseo de Peralta, Santa Fe, New Mexico 87501


Daniel Gutierrez-Reyes (Universidad Complutense de Madrid)


The factorization theorem for DY and semi-inclusive DIS holds for all leading twist transverse momentum distributions. However a QCD perturbative calculation shows several important characteristics of spin-dependent distributions. We consider all the different spin-dependent distributions which can be matched onto integrated twist-2 functions, focusing on the Helicity, Transversity and Pretzelosity distributions. The pretzelosity case is specially relevant because, using a direct perturbative calculation at one loop, we obtain a null result which agrees with the experimental measurements. We show the complete set results of the matching at NLO and the results focusing on Transversity and Pretzelosity at NNLO.

Presentation materials