About agreement of PYTHIA and the experimental results in $e^+e^-$ annihilation to hadrons

TL;DR

This paper compares experimental charged particle multiplicity distributions in electron-positron annihilation to hadrons with PYTHIA simulations across multiple energies, highlighting the need for improved tuning at the Z^0 peak.

Contribution

It provides a detailed comparison of PYTHIA simulations with experimental data at various energies, emphasizing the importance of refined tuning at the Z^0 resonance.

Findings

PYTHIA's agreement varies across energies

Discrepancies suggest tuning improvements are needed at Z^0 peak

Quantitative chi-squared analysis performed

Abstract

The experimental charged particles multiplicity distributions in $e^+e^-$ annihilation to hadrons are compared with the distributions obtained by PYTHIA. The ratio $\chi^2$/degrees of freedom is calculated for 6 energies at $\sqrt{s}$ 14 -- 206.2 GeV. The necessity of more subtle tuning of PYTHIA at the energy of $Z^0$ peak is discussed.