Mass-correction-induced enhancement of quantum correlations even beyond entanglement in the $e^{+}e^{-} \rightarrow J/\psi \rightarrow \Lambda(p\pi^{-}) \bar{\Lambda}(\bar{p}\pi^{+})$ process at the BESIII experiment under memory effects

TL;DR

This study investigates how mass corrections and memory effects influence quantum correlations in baryon-antibaryon systems produced at BESIII, revealing enhanced nonlocality and detailed angular dependence beyond previous models.

Contribution

It introduces a detailed analysis of mass corrections and memory effects on quantum correlations, extending understanding beyond entanglement in baryon-antibaryon processes.

Findings

Mass corrections enhance Bell inequality violations.

Mass effects modify angular distributions and introduce extrema.

Classical correlations mitigate quantum decoherence.

Abstract

In this work, we derive the bipartite density matrix for the $e^{+}e^{-} \rightarrow J/\psi \rightarrow \Lambda(p\pi^{-}) \bar{\Lambda}(\bar{p}\pi^{+})$ process at BESIII. We evaluate the impact of mass corrections and memory effects (within Markovian and non-Markovian regimes) on quantum correlations even beyond entanglement. The dependence of these quantum properties on the scattering angle $\varphi$ is analyzed, with a particular focus on the impact of mass corrections. By comparing massless and mass-corrected scenarios, we demonstrate that the inclusion of mass effects enhances the maximum violation of the Bell inequality. While the qualitative temporal behavior remains unchanged, mass corrections quantitatively modify the angular distribution and introduce additional extrema at $\varphi=0$ and $\varphi=\pi$, thereby strengthening non-local correlations without altering their fundamental dynamical origin. An examination of the hierarchy of quantum correlations in baryon-antibaryon systems yields partial confirmation: $\text{Bell Nonlocality} \subset \text{Steering} \subset \text{Entanglement} \subset \text{Discord}$. Additionally, our results show that classical correlations serve to mitigate the decoherence and the decay of quantum correlations. This interplay between classical and quantum correlations suggests practical applications in quantum information and provides a robust framework for investigating baryon-antibaryon interactions.