Transeverse-Momentum Subtraction for Semi-Inclusive Deep-Inelastic Scattering

TL;DR

This paper introduces a transverse-momentum subtraction method for semi-inclusive deep-inelastic scattering, enabling precise higher-order QCD calculations and advancing the analysis of proton structure and hadronization.

Contribution

It presents a novel subtraction approach that allows efficient NNLO and N3LO QCD calculations for semi-inclusive processes, improving theoretical precision.

Findings

Successful NNLO QCD calculations for identified hadron production.

Fully differential phenomenological applications demonstrated.

Method applicable to polarized and unpolarized scattering at high orders.

Abstract

Semi-Inclusive Deep-Inelastic Scattering provides unique access to the three-dimensional momentum and spin structure of the proton, enabling precise studies of parton dynamics and hadronization in QCD. We present a transverse-momentum subtraction approach applied to the detected hadron that enables efficient and precise calculation of higher-order QCD corrections to identified hadron production in Semi-Inclusive Deep-Inelastic Scattering. We demonstrate the success of the method through a next-to-next-to-leading order QCD calculation and provide fully differential phenomenological applications, which provide important ingredients for global analyses of fragmentation functions. Our method is applicable to next-to-next-to-next-to-leading order QCD corrections for both unpolarized and polarized semi-inclusive deep-inelastic scattering.