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• W4226124866 abstract "A bstract The quantum interference between the decays of entangled neutral kaons is studied in the process ϕ → K S K L → 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 $$ mathcal{CPT} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>CPT</mml:mi> </mml:math> 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 × 10 9 ϕ → K S K L decays produced. From the fit of the observed ∆ t distribution, being ∆ t the difference of the kaon decay times, the decoherence and $$ mathcal{CPT} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>CPT</mml:mi> </mml:math> 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 $$ mathcal{CPT} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>CPT</mml:mi> </mml:math> 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." @default.
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• W4226124866 date "2022-04-08" @default.
• W4226124866 modified "2023-10-17" @default.
• W4226124866 title "Precision tests of quantum mechanics and $$ mathcal{CPT} $$ symmetry with entangled neutral kaons at KLOE" @default.
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• W4226124866 doi "https://doi.org/10.1007/jhep04(2022)059" @default.
• W4226124866 hasPublicationYear "2022" @default.
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