Observation of B 0 → ψ(2S)K 0 Sπ +π and B 0 S → ψ(2S)K 0 S decays

CMS Collaboration

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Samenvatting

Using a data sample of s=13TeV proton-proton collisions collected by the CMS experiment at the LHC in 2017 and 2018 with an integrated luminosity of 103fb-1, the Bs0→ψ(2S)KS0 and B0→ψ(2S)KS0π+π- decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond to B(Bs0→ψ(2S)KS0)/B(B0→ψ(2S)KS0)=(3.33±0.69(stat)±0.11(syst)±0.34(fs/fd))×10-2 and B(B0→ψ(2S)KS0π+π-)/B(B0→ψ(2S)KS0)=0.480±0.013(stat)±0.032(syst), where the last uncertainty in the first ratio is related to the uncertainty in the ratio of production cross sections of Bs0 and B mesons, f s/ f d.

Originele taal-2English
Artikelnummer499
Aantal pagina's25
TijdschriftEur. Phys. J. C
Volume82
Nummer van het tijdschrift5
DOI's
StatusPublished - 31 mei 2022

Bibliografische nota

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-18-004 (CMS Public Pages)

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