Abstract
We compute the contribution of twist-2 and twist-3 parton distribution functions to the small-b expansion for transverse momentum dependent (TMD) distributions at all powers of b. The computation is done by the twist-decomposition method based on the spinor formalism for all eight quark TMD distributions. The newly computed terms are accompanied by the prefactor (M2b2)n and represent the target-mass corrections to the resummed cross-section. For the first time, a non-trivial expression for the pretzelosity distribution is derived.
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Moos, V., Vladimirov, A. Calculation of transverse momentum dependent distributions beyond the leading power. J. High Energ. Phys. 2020, 145 (2020). https://doi.org/10.1007/JHEP12(2020)145
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DOI: https://doi.org/10.1007/JHEP12(2020)145