NDLI: Precision tests of quantum mechanics and CPT $ \mathcal{CPT} $ symmetry with entangled neutral kaons at KLOE

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Year: 2022, Volume: 2022

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Precision tests of quantum mechanics and CPT $ \mathcal{CPT} $ symmetry with entangled neutral kaons at KLOE

Content Provider	Directory of Open Access Journals (DOAJ)
Author	X. Kang P. Ciambrone The KLOE-2 collaboration D. Babusci M. Berlowski C. Bloise F. Bossi P. Branchini A. Budano B. Cao F. Ceradini F. Curciarello E. Czerwiński G. D’Agostini R. D’Amico E. Danè V. De Leo E. De Lucia A. De Santis P. De Simone A. Di Cicco A. Di Domenico E. Diociaiuti D. Domenici A. D’Uffizi A. Fantini G. Fantini P. Fermani S. Fiore A. Gajos P. Gauzzi S. Giovannella E. Graziani V. L. Ivanov T. Johansson D. Kisielewska-Kamińska E. A. Kozyrev W. Krzemien A. Kupsc P. A. Lukin G. Mandaglio M. Martini R. Messi S. Miscetti D. Moricciani P. Moskal A. Passeri V. Patera E. Perez del Rio P. Santangelo M. Schioppa A. Selce M. Silarski F. Sirghi E. P. Solodov L. Tortora G. Venanzoni W. Wiślicki M. Wolke
Abstract	Abstract The quantum interference between the decays of entangled neutral kaons is studied in the process ϕ → KSKL → π + π − π + π − , which exhibits the characteristic Einstein-Podolsky-Rosen correlations that prevent both kaons to decay into π + π − at the same time. This constitutes a very powerful tool for testing at the utmost precision the quantum coherence of the entangled kaon pair state, and to search for tiny decoherence and CPT $ \mathcal{CPT} $ violation effects, which may be justified in a quantum gravity framework. The analysed data sample was collected with the KLOE detector at DAΦNE, the Frascati ϕ-factory, and corresponds to an integrated luminosity of about 1.7 fb −1, i.e. to about 1.7 × 109 ϕ → KSKL decays produced. From the fit of the observed ∆t distribution, being ∆t the difference of the kaon decay times, the decoherence and CPT $ \mathcal{CPT} $ violation parameters of various phenomenological models are measured with a largely improved accuracy with respect to previous analyses. The results are consistent with no deviation from quantum mechanics and CPT $ \mathcal{CPT} $ symmetry, while for some parameters the precision reaches the interesting level at which — in the most optimistic scenarios — quantum gravity effects might show up. They provide the most stringent limits up to date on the considered models.
e-ISSN	10298479
DOI	10.1007/JHEP04(2022)059
Journal	Journal of High Energy Physics
Issue Number	4
Volume Number	2022
Language	English
Publisher	SpringerOpen
Publisher Date	2022-01-01
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Nuclear and Particle Physics. Atomic Energy. Radioactivity Beyond Standard Model E +-e − Experiments
Content Type	Text
Resource Type	Article

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