From angular coefficients to quantum observables: a phenomenological appraisal in di-boson systems
High Energy Physics - Phenomenology
2025-01-13 v1 High Energy Physics - Experiment
Quantum Physics
Abstract
Motivated by the growing interest in accessing the spin structure of multi-boson processes and in measuring quantum entanglement at high energies, we study polarisation and spin-correlation coefficients in di-boson systems. We show that higher-order corrections of QCD and electroweak type, off-shell modelling, and realistic effects such as fiducial selections and neutrino reconstruction are unavoidable to properly determine such coefficients, and consequently to provide a sound interpretation of observables sensitive to quantum entanglement and Bell-inequality violation. Our findings are based on a detailed phenomenological analysis of boson pairs at the LHC, either in inclusive electroweak production or coming from Higgs-boson decays.
Cite
@article{arxiv.2409.16731,
title = {From angular coefficients to quantum observables: a phenomenological appraisal in di-boson systems},
author = {Michele Grossi and Giovanni Pelliccioli and Alessandro Vicini},
journal= {arXiv preprint arXiv:2409.16731},
year = {2025}
}