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, fs/ fd.

Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2022). Observation of B0 → ψ(2S)K0Sπ+π− and B0S → ψ(2S)K0S decays. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 82(5) [10.1140/epjc/s10052-022-10315-y].

Observation of B0 → ψ(2S)K0Sπ+π− and B0S → ψ(2S)K0S decays

Monti F.;Xiao J.;Benaglia A.;Boldrini G.;Brivio F.;Cetorelli F.;De Guio F.;Dinardo M. E.;Ghezzi A.;Govoni P.;Guzzi L.;Lucchini M. T.;Malberti M.;Massironi A.;Moroni L.;Paganoni M.;Pinolini B. S.;Ragazzi S.;de Fatis T. T.;Valsecchi D.;Zuolo D.;Ortona G.;Pigazzini S.;Gerosa R.;
2022

Abstract

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, fs/ fd.
Articolo in rivista - Articolo scientifico
Hadrons-Hadrons collisions
English
31-mag-2022
2022
82
5
499
open
Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2022). Observation of B0 → ψ(2S)K0Sπ+π− and B0S → ψ(2S)K0S decays. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 82(5) [10.1140/epjc/s10052-022-10315-y].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/429538
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