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Volume 346 - 23rd International Spin Physics Symposium (SPIN2018) - Parallel Session: Structure of the Nucleon: TMDs (A. Bacchetta, J. Drachenberg and B. Parsamyan)
Twist-2 matching of transverse momentum dependent distributions at next-to-next-to-leading-order in QCD
D. Gutierrez Reyes,* I. Scimemi, A. Vladimirov
*corresponding author
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Pre-published on: 2019 August 19
Published on: 2019 August 23
The factorization theorem for Drell-Yan process and semi inclusive deep inelastic scattering holds for all leading twist transverse momentum distributions. In this context, a QCD perturbative cal- culation shows several important characteristics of spin-dependent distributions. We consider all the diferent spin-dependent distributions which can be matched onto integrated twist-2 functions, focusing on the transversity and pretzelosity distributions. The pretzelosity case is specially rele- vant because, using a direct perturbative calculation, we obtain a null result up to two loops which agrees with the experimental measurements. We show the complete set results of the matching at next-to-leading-order and the results focusing on transversity and pretzelosity at next-to-next-to- leading-order.
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