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arXiv · 2008.01744

Calculation of transverse momentum dependent distributions beyond the leading power

Valentin Moos·Alexey Vladimirov
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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 $(M^2b^2)^n$ 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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Valentin Moos, Alexey Vladimirov. 2020-08-04. Calculation of transverse momentum dependent distributions beyond the leading power. https://arxiv.org/abs/2008.01744

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