Yetkin, Elif Aslı2022-10-252022-10-252022-051434-6044https://hdl.handle.net/11411/4605https://doi.org/10.1140/epjc/s10052-022-10315-yAbstract: 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??(2S)KS0 and B0??(2S)KS0?+?- decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond to B(Bs0??(2S)KS0)/B(B0??(2S)KS0)=(3.33±0.69(stat)±0.11(syst)±0.34(fs/fd))×10-2 and B(B0??(2S)KS0?+?-)/B(B0??(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. © 2022, The Author(s).eninfo:eu-repo/semantics/openAccessArticle2-s2.0-8513117705510.1140/epjc/s10052-022-10315-y35666690Q1WOS:000850021700001