Recent Improvements for the Lepton Propagator PROPOSAL

TL;DR

This paper presents recent improvements to the PROPOSAL Monte-Carlo simulation library, enhancing performance, accuracy, and usability for high-energy lepton propagation modeling.

Contribution

The authors introduce a code restructuring, more precise decay and interaction calculations, and a modular design with a Python interface for the PROPOSAL library.

Findings

Performance improved by up to 30%

Enhanced accuracy with better decay and cross-section models

Increased flexibility through modular architecture

Abstract

The lepton propagator PROPOSAL is a Monte-Carlo Simulation library written in C++, propagating high energy muons and other charged particles through large distances of media. In this article, a restructuring of the code is described, which yields a performance improvement of up to $30\,\%$. For an improved accuracy of the propagation processes, more exact calculations of the leptonic and hadronic decay process and more precise parametrizations for the interaction cross sections are now available. The new modular structure allows a more flexible and custom usage, which is further facilitated with a python interface.