The excess of positive charges and the leading particles in DIS at HERA

TL;DR

This paper investigates the charge distribution of leading particles in deep inelastic scattering at HERA using various QCD models, confirming the positive charge bias predicted by theoretical models across different kinematic ranges.

Contribution

It compares multiple QCD models' predictions on leading particle charge in DIS, providing insights into their consistency with the modified quark parton model.

Findings

Leading particles are predicted to be predominantly positive.

The models agree with the modified quark parton model expectations.

Charge asymmetry persists over a wide range of x and Q^2.

Abstract

The charge of the leading particle in DIS interactions is studied with the QCD models LEPTO, ARIADNE, RAPGAP and HERWIG. It is predicted to be preferentially positive, as is expected from the modified quark parton model and is studied over a wide range of x and Q^2.