Quantum tops at circular lepton colliders
A bstract We study the quantum properties of top quark pairs in lepton colliders with unpolarised beams, including spin correlations, entanglement, and violation of Bell inequalities. We present analytical results in the SM and in the SMEFT and discuss several practical aspects, like the choice of quantisation axes and $$ t\overline{t} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>t</mml:mi> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> threshold effects. We also note a correspondence between parity symmetry and entanglement. We find that quantum observables exhibit a rich phenomenology in the SM, and can also provide additional leverage in detecting new physics residing at higher scales.
Authors
- Claudio Severi (ORCID: https://orcid.org/0000-0003-3082-5639)
- Fabio Maltoni (ORCID: https://orcid.org/0000-0003-4890-0676)
- Eleni Vryonidou (ORCID: https://orcid.org/0000-0003-4481-3639)
- Simone Tentori (ORCID: https://orcid.org/0000-0002-2398-9056)
Institutions
- University of Manchester (GB)
- Osservatorio astronomico di Bologna (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (IT)
- University of Bologna (IT)
- UCLouvain (BE)
Publication Details
- Journal
- Journal of High Energy Physics
- Published
- 2024-09-02
- DOI
- https://doi.org/10.1007/jhep09(2024)001
- Citations
- 29
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 19.13
Funders
- European Commission
- Fonds De La Recherche Scientifique - FNRS
- Science and Technology Facilities Council
- Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture