Analytical Insights on Hadronic Top Quark Polarimetry

TL;DR

This paper develops an analytical framework to enhance understanding of hadronic top quark polarization measurements by exploring jet dynamics, offering new insights beyond traditional lepton-based analyses.

Contribution

It introduces a formalism that analytically relates jet properties to top quark polarization, expanding the tools for hadronic top spin analysis.

Findings

Analytical expressions linking jet features to top polarization.

Insights into the role of jet kinematics and charges in spin measurements.

Potential improvements in hadronic top polarization analysis methods.

Abstract

Top quark polarization provides an important tool for studying its production mechanisms, spin correlations, top quark properties, and new physics searches. Unlike lighter quarks, the top quark's polarization remains intact until its decay, enabling precise spin measurements. While the down-type fermions from $W$ boson decay are known to be effective spin analyzers, charged leptons have typically been the main target for most analyses. In this paper, we investigate the relevance of global jet dynamics -- considering kinematics, jet charges, and particle multiplicity -- for hadronic top quark polarimetry. The formalism used allows for analytical derivations obtained throughout the manuscript, offering deeper insights into the corresponding phenomenology.