Cluster Hadronization in HERWIG 5.9

TL;DR

The paper analyzes a peculiarity in Herwig 5.9's cluster hadronization when heavy baryon resonances are added, which unexpectedly lowers proton yields. It proposes a new two-body decay scheme that treats decay channels more uniformly by weighting channel phase spaces, and tunes this scheme against LEP event shapes and identified-particle spectra. The tuned, new scheme improves the description of inclusive particle data, especially in the baryon sector, though some resonances remain challenging. This work enhances the predictive reliability of Hadronization in LEP-era analyses and has implications for baryon-number propagation and strange diquark suppression in future experiments like HERA.

Abstract

The HERWIG 5.9 cluster hadronization model is briefly discussed here. It is shown that the model has peculiar behaviour when new heavy baryon resonances are included in the HERWIG 5.9 particle table. New fragmentation model is proposed to cure this problem and simple tuning of HERWIG 5.9 with this new model has been made using event shapes variables and identified particle momentum spectra in electron-positron interactions at LEPI. Finally, the predictions of the two hadronization models are compared.