Determining the helicity structure of third generation resonances

TL;DR

This paper evaluates methods to determine the helicity structure of new resonances decaying into third generation quarks and leptons, considering realistic experimental effects and uncertainties.

Contribution

It provides analytical predictions and assesses the practical applicability of variables for helicity determination in realistic collider scenarios.

Findings

Variables retain discriminating power despite QCD radiation

Monte Carlo simulations validate analytical predictions

Method robustness under detector effects

Abstract

We examine methods that have been proposed for determining the helicity structure of decays of new resonances to third generation quarks and/or leptons. We present analytical and semi-analytical predictions and assess the applicability of the relevant variables in realistic reconstruction scenarios using Monte Carlo-generated events, including the effects of QCD radiation and multiple parton interactions, combinatoric ambiguities and fast detector simulation.