Vertex Detection for a Charm Tag in e+e- -> W+W- at a High Energy Electron-Positron Linear Collider

TL;DR

This paper explores charm quark identification in $e^+e^- o W^+W^-$ events at a linear collider, using a JAVA implementation of the ZVTOP vertex finding algorithm to improve helicity analysis of W boson decays.

Contribution

It introduces a JAVA-based implementation of the ZVTOP vertex finder for charm tagging in linear collider W decay events, enhancing analysis capabilities.

Findings

Charm tag efficiencies and purities were successfully extracted.

The vertex finding algorithm improved charm identification accuracy.

The method supports detailed helicity analysis of W boson decays.

Abstract

The study of the process $e^+e^- \to W^+W^-$ at Linear Collider energies presents a good opportunity to investigate anomalous triple gauge boson couplings and $W^+_LW^-_L$ rescattering. The helicity analysis of the $e^+e^- \to W^+_LW^-_L$ decays will benefit if the charm quark containing jet can be identified for events which contain one hadronic $W$ boson decay to a charm and another quark. A JAVA implementation of the SLD collaboration's topological vertex finding algorithm (ZVTOP) in the linear collider analysis framework has been used to extract charm tag efficiencies and purities based on vertex multiplicities.