Measurement of CP Violation in B0→ψ(→ℓ+ℓ−)K0S(→π+π−) Decays

LHCb collaboration, Constantinos Vrahas, G Robertson, M Richardson-Slipper, S Petrucci, R H O'Neil, S E Mitchell, K Gizdov, A Bohare

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A measurement of time-dependent CP violation in the decays of B0 and ¯B0 mesons to the final states J/ψ(→μ+μ−)K0S, ψ(2S)(→μ+μ−)K0S and J/ψ(→e+e−)K0S with K0S→π+π− is presented. The data correspond to an integrated luminosity of 6  fb−1 collected at a center-of-mass energy of √s=13  TeV with the LHCb detector. The CP-violation parameters are measured to be SψK0S=0.717±0.013(stat)±0.008(syst) and CψK0S=0.008±0.012(stat)±0.003(syst). This measurement of SψK0S represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed.
Original languageEnglish
Article number021801
Pages (from-to)1-12
Number of pages12
JournalPhysical Review Letters
Volume132
Issue number2
DOIs
Publication statusPublished - 12 Jan 2024

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