Study of tracking efficiency and its systematic uncertainty from $J/\psi \to p \overline{p} \pi^+ \pi^-$ at BESIII

TL;DR

This paper evaluates the tracking efficiency and systematic uncertainties in particle detection at BESIII using $J/ar{J}$ decay events, providing detailed validation and analysis of factors affecting measurement accuracy.

Contribution

It introduces a comprehensive method to assess tracking efficiency and systematic uncertainties for protons and pions in $J/\psi$ decays at BESIII, including dependence on momentum and angle.

Findings

Quantified tracking efficiency for protons and pions.

Identified key factors influencing systematic uncertainties.

Validated tracking performance with detailed analysis.

Abstract

Based on $J/\psi$ events collected with the BESIII detector, with corresponding Monte Carlo samples, the tracking efficiency and its systematic uncertainty are studied using a control sample of $J/\psi \to p \overline p \pi^+ \pi^-$. Validation methods and different factors influencing the tracking efficiency are presented in detail. The tracking efficiency and its systematic uncertainty for protons and pions with the transverse momentum and polar angle dependence are also discussed.