par Tumasyan, A.;Beghin, Diego
;Bilin, Bugra
;Clerbaux, Barbara
;De Lentdecker, Gilles
;Favart, Laurent
;Kalsi, Amandeep Kaur
;Lee, Kyeongpil
;Mahdavikhorrami, Mostafa
;Makarenko, Inna
;Malara, Andrea
;Moureaux, Louis
;Paredes Saenz, Santiago
;Pétré, Laurent
;Popov, Andrey
;Postiau, Nicolas
;Starling, Elizabeth Rose
;Thomas, Laurent
;Vanden Bemden, Max
;Vander Velde, Catherine
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; [et al.]
Référence European Physical Journal C. Particles and Fields, 82, 5, 499
Publication Publié, 2022-05-01




















Référence European Physical Journal C. Particles and Fields, 82, 5, 499
Publication Publié, 2022-05-01
Article révisé par les pairs
Résumé : | 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. |