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Semi-Inclusive Deep Inelastic Scattering in Wandzura-Wilczek-type approximation

https://doi.org/10.1007/JHEP06(2019)007

Bastami, S; Avakian, H; Efremov, A V; Kotzinian, A; Musch, B U; Parsamyan, B; Prokudin, A; Schlegel, M; Schnell, G; Schweitzer, P; et al (June 2019, The journal of high energy physics)

We present the complete cross-section for the production of unpolarized hadrons in semi-inclusive deep-inelastic scattering up to power-suppressed O(1/Q^2) terms in the Wandzura-Wilczek-type approximation, which consists in systematically assuming that qgqbar-terms are much smaller than qqbar -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.
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Multidimensional, High Precision Measurements of Beam Single Spin Asymmetries in Semi-inclusive $π^{+}$ Electroproduction off Protons in the Valence Region

https://doi.org/10.1103/PhysRevLett.128.062005

Diehl, S.; Kim, A.; Angelini, G.; Joo, K.; Adhikari, S.; Amaryan, M.; Arratia, M.; Atac, H.; Avakian, H.; Ayerbe Gayoso, C.; et al (February 2022, Physical Review Letters)

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Extraction of Beam-Spin Asymmetries from the Hard Exclusive $π^{+}$ Channel off Protons in a Wide Range of Kinematics

https://doi.org/10.1103/PhysRevLett.125.182001

Diehl, S.; Joo, K.; Kim, A.; Avakian, H.; Kroll, P.; Park, K.; Riser, D.; Semenov-Tian-Shansky, K.; Tezgin, K.; Adhikari, K. P.; et al (October 2020, Physical Review Letters)
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Science Requirements and Detector Concepts for the Electron-Ion Collider

https://doi.org/10.1016/j.nuclphysa.2022.122447

Abdul Khalek, R.; Accardi, A.; Adam, J.; Adamiak, D.; Akers, W.; Albaladejo, M.; Al-bataineh, A.; Alexeev, M.G.; Ameli, F.; Antonioli, P.; et al (October 2022, Nuclear Physics A)

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