Measurement of inclusive particle spectra and test of MLLA prediction in $e^+e^-$ annihilation at $\sqrt{s}$=58GeV

TL;DR

This paper measures inclusive particle spectra in electron-positron annihilation at 58 GeV and tests the predictions of the MLLA QCD model, finding good agreement and analyzing energy dependence of spectral peaks.

Contribution

It provides the first detailed comparison of inclusive spectra at 58 GeV with MLLA predictions, confirming the model's accuracy in this energy regime.

Findings

MLLA reproduces measured spectra well

Energy dependence of peak positions matches MLLA predictions

Spectral shapes are consistent across different particle types

Abstract

Inclusive momentum spectra are measured for all charged particles and for each of $\pi^{\pm}$, $K^{\pm}$, $K^0/\bar{K^0}$, and $p/\bar{p}$ in hadronic events produced via $e^+e^-$ annihilation at $\sqrt{s}$=58GeV . The measured spectra are compared with QCD predictions based on the modified leading log approximation(MLLA). The MLLA model reproduces the measured spectra well. The energy dependence of the peak positions of the spectra is studied by comparing the measurements with those at other energies. The energy dependence is also well described by the MLLA model.