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arXiv · 2403.14757

New physics in spin entanglement

Mateusz Duch·Alessandro Strumia·Arsenii Titov
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Abstract

We propose a theory that preserves spin-summed scattering and decay rates at tree level while affecting particle spins. This is achieved by breaking the Lorentz group in a non-local way that tries avoiding stringent constraints, for example leaving unbroken the maximal sub-group SIM(2). As a phenomenological application, this new physics can alter the spins of top-antitop pairs (and consequently their entanglement) produced in $pp$ collisions without impacting their rates. Some observables affected by loops involving top quarks with modified entanglement receive corrections.

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Mateusz Duch, Alessandro Strumia, Arsenii Titov. 2024-03-21. New physics in spin entanglement. https://arxiv.org/abs/2403.14757

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