Semi-Inclusive Hadron Production at HERA: the Effect of QCD Gluon Resummation

TL;DR

This paper develops a resummation formalism for perturbative QCD to better describe semi-inclusive deep inelastic scattering at HERA, achieving good agreement with experimental measurements of energy flows and particle multiplicities.

Contribution

It introduces an all-order resummation approach for large logarithms in semi-inclusive DIS, enhancing the theoretical description of hadron production.

Findings

Good agreement with HERA data on transverse energy flows.

Improved perturbative QCD applicability in semi-inclusive DIS.

Resummation formalism analogous to small transverse momentum vector boson production.

Abstract

We present a formalism that improves the applicability of perturbative QCD in the current region of semi-inclusive deep inelastic scattering. The formalism is based on all-order resummation of large logarithms arising in the perturbative treatment of hadron multiplicities and energy flows in this region. It is shown that the current region of semi-inclusive DIS is similar to the region of small transverse momenta in vector boson production at hadron colliders. We use this resummation formalism to describe transverse energy flows and charged particle multiplicity measured at the electron-proton collider HERA. We find good agreement between our theoretical results and experimental data for the transverse energy flows.