Spin determination of single-produced resonances at hadron colliders

TL;DR

This paper presents a method to determine the spin and parity of single-produced resonances at the LHC through full angular analysis of decay products, aiding in understanding their couplings to Standard Model particles.

Contribution

It introduces a comprehensive simulation framework for analyzing resonance spin and parity using angular correlations, considering all possible spins and couplings.

Findings

Full reconstruction enables spin and parity determination.

Angular analysis constrains resonance couplings.

Simulation covers all spin and coupling scenarios.

Abstract

We study the production of a single resonance at the LHC and its decay into a pair of Z bosons. We demonstrate how full reconstruction of the final states allows us to determine the spin and parity of the resonance and restricts its coupling to vector gauge bosons. Full angular analysis is illustrated with the simulation of the production and decay chain including all spin correlations and the most general couplings of spin-zero, -one, and -two resonances to Standard Model matter and gauge fields. We note implications for analysis of a resonance decaying to other final states.