New Possibilities for Testing Local Realism in High Energy Physics

TL;DR

This paper proposes new methods to test local realism using high-energy physics experiments involving entangled photons and vector mesons, demonstrating feasible experimental schemes to challenge quantum mechanics versus local realism.

Contribution

It introduces novel high-dimensional entangled states from particle decays and proposes concrete experimental schemes for Bell inequality tests in high-energy physics.

Findings

High-dimensional entangled states from particle decays.

Feasible experimental schemes for Bell tests in high-energy physics.

Potential to challenge local realism with new entanglement tests.

Abstract

The three photons from the dominant ortho-positronium decay and two vector mesons from the $\eta_c$ exclusive decays are found to be in tripartite and high-dimensional entangled states, respectively. These two classes of entangled states possess the Hardy type nonlocality and allow a priori for quantum mechanics vs local realism test via Bell inequalities. The experimental realizations are shown to be feasible, and a concrete scheme to fulfill the test in experiment via two-vector-meson entangled state is proposed.