Applications of the WW-type approximation to SIDIS

S. Bastami; H. Avakian; A. V. Efremov; A. Kotzinian; B. U. Musch; B. Parsamyan; A. Prokudin; M. Schlegel; G. Schnell; P. Schweitzer; K. Tezgin

arXiv · 1907.11165

Applications of the WW-type approximation to SIDIS

S. Bastami·H. Avakian·A. V. Efremov·A. Kotzinian·B. U. Musch·B. Parsamyan·A. Prokudin·M. Schlegel·G. Schnell·P. Schweitzer·K. Tezgin

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Abstract

We explore the complete cross-section for the production of unpolarized hadrons in semi-inclusive deep-inelastic scattering up to power-suppressed $\mathcal{O}(1/Q^2)$ terms in the Wandzura-Wilczek-type (WW-type) approximation, which consists in systematically assuming that $\bar{q}gq$-correlators are much smaller than $\bar{q}q$-correlators. Under the applicability of WW-type approximations, certain relations among transverse momentum dependent parton distribution functions (TMDs) and fragmentation functions (FFs) occur which are used to approximate SIDIS cross-section in terms of a smaller subset of TMDs and FFs. We discuss the applicability of the WW-type approximations on the basis of available data.

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S. Bastami, H. Avakian, A. V. Efremov, A. Kotzinian, B. U. Musch, B. Parsamyan, A. Prokudin, M. Schlegel, G. Schnell, P. Schweitzer, K. Tezgin. 2019-07-25. Applications of the WW-type approximation to SIDIS. https://arxiv.org/abs/1907.11165

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