From angular coefficients to quantum observables: a phenomenological appraisal in di-boson systems
- URL: http://arxiv.org/abs/2409.16731v1
- Date: Wed, 25 Sep 2024 08:30:54 GMT
- Title: From angular coefficients to quantum observables: a phenomenological appraisal in di-boson systems
- Authors: Michele Grossi, Giovanni Pelliccioli, Alessandro Vicini,
- Abstract summary: Motivated by the growing interest in accessing the spin structure of multi-boson processes, 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.
- Score: 44.99833362998488
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- 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.
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