Kinematic power corrections for TMD factorization theorem of semi-inclusive deep-inelastic scattering
Year: 2026
Type: article
Abstract: A bstract We evaluate the complete set of kinematic power corrections (KPCs) to the leading power (LP) term of the transverse momentum dependent (TMD) factorization theorem for semi-inclusive deep-inelastic scattering (SIDIS) with a polarized target. This formulation restores the contributions of twist-two TMD distributions to all structure functions, including those that vanish at leading power, such as contributions of longitudinal photons. The resulting expressions are explicitly gauge- and frame-invariant, and inherit all key features of the standard TMD factorization framework, including the coefficient functions and the evolution equations. Numerical estimations show that KPCs contribute only a few percent at Q ~ 10 GeV, but can reach several tens of percents when Q ~ 2 GeV. Consequently, accounting for kinematic power corrections can be vital for an accurate theoretical description of current SIDIS measurements.
Source: Journal of High Energy Physics
Authors: Sara Piloñeta, Alexey Vladimirov
Institution: Universidad Complutense de Madrid
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7134267064