Tuning of the helix string model on the DELPHI $Z^0\rightarrow q\bar{q}$ data

TL;DR

This paper evaluates a helix string model of Lund string fragmentation against Z0 decay data, showing improved agreement and supporting the existence of momentum component correlations predicted by the model.

Contribution

It introduces a helix-like ordered gluon field model for string fragmentation and demonstrates its superior fit to experimental data over traditional models.

Findings

Improved description of hadronic Z0 decay data

Evidence supporting correlations between longitudinal and transverse momenta

Validation of the helix string model's predictions

Abstract

An alternative model of the fragmentation of the Lund string, investigating the hypothesis of helix-like ordered gluon field, is compared with hadronic $Z^0$ data. A significant improvement in the description of various measured quantities is achieved. In particular, the existence of correlations between longitudinal and transverse components of hadron momenta (as suggested by the helix string model) seems to be supported by the data.