In this article, we discuss a new software package of kinematic and vertex fitting for the CMD-3 experiment at the VEPP-2000 electron-positron collider. The authors describe in detail the fitting algorithm, parametrization of four-momenta and trajectories of various particles and present the results of testing the fitting package using events of Monte Carlo simulation of various e+e− annihilation processes. The authors also provide several examples of the fitting package validation using Gaussian simulation. Although the package discussed in this article is intended for the CMD-3 experiment, it can also be used in other experiments. The authors consider the described package as their first step towards a more universal and rigrous kinematic and vertex fitting package that can be used in future e+e− experiments, such as the Super Charm-Tau factory.
@article{arxiv.2208.11569,
title = {Kinematic and vertex fitting package for the CMD-3 experiment},
author = {S. S. Gribanov and A. S. Popov},
journal= {arXiv preprint arXiv:2208.11569},
year = {2023}
}