Observation of B0→ψ(2S)K0S π+π− and B0s→ψ(2S)K0S Decays

European Physics Journal C 2022
Kārlis Dreimanis, Viesturs Veckalns, CMS Collaboration

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 103~fb−1, the B0s→ψ(2S)K0S and B0→ψ(2S)K0Sπ+π− decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond to B(B0s→ψ(2S)K0S)/B(B0→ψ(2S)K0S)=(3.33±0.69(stat)±0.11(syst)±0.34(fs/fd))×10−2 and B(B0→ψ(2S)K0Sπ+π−)/B(B0→ψ(2S)K0S)=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 B0s and B0 mesons, fs/fd.

DOI
10.1140/epjc/s10052-022-10315-y
Hipersaite
https://link.springer.com/article/10.1140/epjc/s10052-022-10315-y

The CMS collaboration, Tumasyan, A., Dreimanis, K., Veckalns, V., ... [et al.].Observation of B0→ψ(2S)K0S π+π− and B0s→ψ(2S)K0S Decays. European Physics Journal C, 2022, Vol. 82, No. 5, Article number 499. ISSN 1434-6044. e-ISSN 1434-6052. Available from: doi:10.1140/epjc/s10052-022-10315-y

Publikācijas valoda
English (en)