Angular asymmetries as a probe for anomalous contributions to HZZ vertex at the LHC

TL;DR

This paper explores how angular asymmetries in Higgs decays to Z bosons at the LHC can reveal non-Standard Model contributions to the HZZ vertex, considering experimental effects and potential discovery prospects.

Contribution

It introduces a method to probe the tensor structure of the HZZ vertex using angular asymmetries and shape analyses, accounting for realistic experimental conditions.

Findings

Potential to discover non-Standard Model contributions with 3000 fb^{-1} data

Angular asymmetries effectively distinguish tensor coupling structures

Analysis includes background, resolution, and efficiency effects

Abstract

In this article, the prospects for studying the tensor structure of the HZZ vertex with the LHC experiments are presented. The structure of tensor couplings in Higgs di-boson decays is investigated by measuring the asymmetries and by studing the shapes of the final state angular distributions. The expected background contributions, detector resolution, and trigger and selection efficiencies are taken into account. The potential of the LHC experiments to discover sizeable non-Standard Model contributions to the HZZ vertex with $300\;{\rm fb}^{-1}$ and $3000\;{\rm fb}^{-1}$ is demonstrated.