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Article
Report number	arXiv:1807.10606 ; JLAB-THY-18-2775
Title	Semi-Inclusive Deep Inelastic Scattering in Wandzura-Wilczek-type approximation
Author(s)	Bastami, S. (Connecticut U.) ; Avakian, H. (Jefferson Lab) ; Efremov, A.V. (Dubna, JINR) ; Kotzinian, A. (Yerevan Phys. Inst. ; INFN, Turin) ; Musch, B.U. (Regensburg U.) ; Parsamyan, B. (CERN) ; Prokudin, A. (Jefferson Lab ; Penn State U., Berks-Lehigh Valley) ; Schlegel, M. (New Mexico State U.) ; Schnell, G. (Basque U., Bilbao ; IKERBASQUE, Bilbao) ; Schweitzer, P. (Connecticut U. ; Tubingen U.) ; Tezgin, K. (Connecticut U.)
Publication	2019-06-04
Imprint	2018-07-27
Number of pages	71
Note	Published in JHEP, 71 pages, 21 figures, references updated, discussion improved
In:	EPJ Web Conf. 204 (2019) pp.01013
In:	24th International Baldin Seminar on High Energy Physics Problems : Relativistic Nuclear Physics and Quantum Chromodynamics, Dubna, Russia, 17 - 22 Sep 2018, pp.01013
DOI	10.1051/epjconf/201920401013 10.1007/JHEP06(2019)007
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	We present the complete cross-section for the production of unpolarized hadrons in semi-inclusive deep-inelastic scattering up to power-suppressed ${\cal O}(1/Q^2)$ terms in the Wandzura--Wilczek-type approximation which consists in systematically assuming that $\bar{q}gq$--terms are much smaller than $\bar{q}q$--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 Jefferson Lab, COMPASS, HERMES, 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 our understanding of the TMD theory beyond leading twist.
Copyright/License	CC-BY-4.0 preprint: (License: arXiv nonexclusive-distrib 1.0)

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