A measurement of CP asymmetry in $D^0 \to K_S^0 K_S^0$ decays is reported, based on a data sample of proton-proton collisions collected with the LHCb detector in 2024 at a centre-of-mass energy of 13.6 TeV, corresponding to an integrated luminosity of 6.2 fb$^{-1}$. The $D^0 \to K_S^0 \pi^+\pi^-$ decay is used as calibration channel to cancel residual detection and production asymmetries. The time-integrated CP asymmetry for the $D^0 \to K_S^0 K_S^0$ mode is measured to be (Formula presented.) where the first uncertainty is statistical, and the second is systematic. This measurement represents the most precise single-experiment determination of this quantity to date.

Measurement of CP asymmetry in $D^0 \to K_S^0 K_S^0$ decays with Run 3 data

Celestino I.
Membro del Collaboration Group
;
Cordova G.
Membro del Collaboration Group
;
Kleijne N.
Membro del Collaboration Group
;
Morello M. J.
Membro del Collaboration Group
;
Passaro D.
Membro del Collaboration Group
;
Pica L.
Membro del Collaboration Group
;
Riccardi D.
Membro del Collaboration Group
;
Xu A.
Membro del Collaboration Group
;
2026

Abstract

A measurement of CP asymmetry in $D^0 \to K_S^0 K_S^0$ decays is reported, based on a data sample of proton-proton collisions collected with the LHCb detector in 2024 at a centre-of-mass energy of 13.6 TeV, corresponding to an integrated luminosity of 6.2 fb$^{-1}$. The $D^0 \to K_S^0 \pi^+\pi^-$ decay is used as calibration channel to cancel residual detection and production asymmetries. The time-integrated CP asymmetry for the $D^0 \to K_S^0 K_S^0$ mode is measured to be (Formula presented.) where the first uncertainty is statistical, and the second is systematic. This measurement represents the most precise single-experiment determination of this quantity to date.
Measurement of CP asymmetry in D0 → KS0KS0 decays with Run 3 data
2026
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
Charm Physics; CP Violation; Flavour Physics; Hadron-Hadron Scattering
   Real time reconstruction of data from LHC experiments with a distributed FPGA system
   Ministero della pubblica istruzione, dell'università e della ricerca
   2022Z3K93E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/165064
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