Quantum detection of new physics in top-quark pair production at the LHC

TL;DR

This paper explores how quantum information tools applied to top-quark pair production at the LHC can enhance the detection of new physics by analyzing spin correlations and comparing quantum and classical observables.

Contribution

It introduces the use of quantum observables in collider data analysis, demonstrating their potential to improve sensitivity to new physics beyond classical methods.

Findings

Quantum observables provide complementary information to classical ones.

Quantum observables can enhance the detection of new physics effects.

Quantum tools offer additional leverage in certain scenarios.

Abstract

The recent observation of entanglement between top and anti-top quarks at the LHC opens the way to interpreting collider data with quantum information tools. In this work we investigate the relevance of quantum observables in searches of new physics. To this aim, we study spin correlations of top/anti-top pairs originating from various intermediate resonances, and compare the discovery reach of quantum observables compared to classical ones. We find that they provide complementary information and, in several notable cases, also the additional leverage necessary to detect new effects.