Momentum entanglement at colliders: the $H \to WW,ZZ$ case

TL;DR

This paper investigates momentum entanglement in Higgs boson decays to weak boson pairs, proposing a discretisation method to analyze entanglement and estimating its detectability at colliders.

Contribution

It introduces a novel discretisation approach for studying momentum entanglement in Higgs decays, applicable to collider experiments and beyond.

Findings

Momentum entanglement exists in Higgs decays to WW and ZZ.

The discretisation method enables analysis of entanglement at high energies.

Potential for measuring entanglement sensitivity at the LHC and future colliders.

Abstract

We address momentum entanglement in Higgs decays to weak boson pairs, $H \to WW,ZZ$, by discretising momentum space. The momenta of the two weak bosons are entangled, as well as the degrees of freedom in momentum and spin spaces. For $H \to ZZ$ in the four-lepton final state, we also estimate the statistical sensitivity of entanglement measures at the Large Hadron Collider and future upgrades. The discretisation method introduced here is broadly applicable, offering a framework for studies of momentum entanglement at the energy frontier.