Multiplicity and momentum distributions of hadrons in deep inelastic scattering at HERA energies

TL;DR

This paper investigates the universality and scaling of hadronisation in deep inelastic scattering at HERA, analyzing multiplicity and momentum spectra of charged hadrons and comparing results across different processes and models.

Contribution

It provides new measurements of hadron multiplicity and momentum spectra in deep inelastic scattering, and compares these with e+e- annihilation data and theoretical predictions.

Findings

Hadronisation shows universal scaling behaviour across different processes.

Measured spectra agree with leading-logarithm parton-shower models.

Results support the universality of hadronisation in various high-energy interactions.

Abstract

The universality and scaling behaviour of hadronisation have been investigated in semi-inclusive neutral current deep inelastic ep scattering; specifically the multiplicity and scaled momentum spectra of charged hadrons have been measured and analysed. The measurements are performed in the current region of the Breit frame, as well as in the current fragmentation region of the hadronic centre-of-mass frame. The data collected at the HERA ep collider by the H1 and ZEUS experiments are compared with similar measurements obtained in e+e- annihilation and with previous ep measurements as well as with leading-logarithm parton-shower predictions.