TL;DR
This paper introduces an independent, easy-to-use vertex fitting package compatible with ROOT libraries, designed to be integrated into various external applications in high-energy physics analysis.
Contribution
It provides a standalone vertex fitting tool with minimal dependencies, simplifying integration outside of existing HEP experiment software frameworks.
Findings
Compatible with track trajectories as helices or straight lines
Easy to integrate with external applications
Expandable to other trajectory types
Abstract
Vertex fitting code is commonly found within the analysis packages of several HEP experiments, unfortunately it usually deeply packaged inside their software infrastructure, making it cumbersome to use in the context of external applications. In this paper a totally independent package is described. The only dependencies being the ROOT libraries, making it easy to use in a wide range of applications. The code currently works with track trajectories that are either helices or straight lines, as generated by charged or neutral particles in a constant magnetic field, but is expandable in principle to other type of trajectories or parameterizations.
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