Semi-inclusive deep-inelastic scattering in Wandzura-Wilczek-type approximation

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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28 Scopus citations


We present the complete cross-section for the production of unpolarized hadrons in semi-inclusive deep-inelastic scattering up to power-suppressed O(1 / Q2) terms in the Wandzura-Wilczek-type approximation, which consists in systematically assuming that q¯ gq-terms are much smaller than q¯ q-correlators. We compute all twist-2 and twist-3 structure functions and the corresponding asymmetries, and discuss the applicability of the Wandzura-Wilczek-type approximations on the basis of available data. We make predictions that can be tested by data from COMPASS, HERMES, Jefferson Lab, and the future Electron-Ion Collider. The results of this paper can be readily used for phenomenology and for event generators, and will help to improve the description of semi-inclusive deep-inelastic processes in terms of transverse momentum dependent parton distribution functions and fragmentation functions beyond the leading twist.

Original languageEnglish (US)
Article number7
JournalJournal of High Energy Physics
Issue number6
StatePublished - Jun 1 2019

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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