Implementation of antiproton generator in Geant4

TL;DR

This paper presents a new antiproton generator for Geant4, based on a theoretical model with near-threshold treatment, validated against experimental data, and applicable to the COMET experiment and other near-threshold antiproton studies.

Contribution

The paper introduces a novel antiproton generator in Geant4 that incorporates near-threshold effects and is validated with experimental data, enhancing simulation accuracy.

Findings

Generator matches experimental CERN and ITEP data.

Enables accurate antiproton yield estimation in COMET.

Facilitates background estimation for antiproton-related experiments.

Abstract

A generator of antiproton ($\bar{p}$) in Geant4 has been developed using a theoretical model with the consideration of near-threshold treatment and used preliminarily in COMET experiment. The precision of this generator has been verified by comparing with experimental results taken in CERN (1970) and ITEP (1994). By implementing this generator into official data analysis framework of COMET, the yield of $\bar{p}$ in COMET experiment can be evaluated properly. Background caused by $\bar{p}$ can also be estimated by this generator in future, which will instruct the design and optimization. Moreover, this generator can also be used in the simulation of other experiments involving near-threshold $\bar{p}$ generation.