Observation of B 0 → ψ (2S)K S 0 π + π - and B s 0 → ψ (2S)K S 0 decays.

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OhS I PakS SekmenY C YangH Kim D H Moon B Francois T J Kim J ParkS ChoS Choi B HongK LeeK S LeeJ LimJ ParkS K ParkJ YooJ GohA GurtuH S KimY KimJ AlmondJ H BhyunJ ChoiS JeonJ KimJ S KimS KoH KwonH LeeS LeeB H OhM OhS B OhH SeoU K YangI YoonW JangD Y KangY KangS KimB KoJ S H LeeY LeeJ A MerlinI C ParkY RohM S RyuD SongWatson I JS YangS HaH D YooM ChoiH LeeY LeeI YuT BeyrouthyY MaghrbiKārlis Dreimanis V VeckalnsM AmbrozasA Carvalho Antunes De Oliveira A Juodagalvis A Rinkevicius G Tamulaitis N Bin NorjoharuddeenZ ZolkapliJ F Benitez A Castaneda HernandezH A Encinas AcostaL G Gallegos MaríñezM León CoelloJ A Murillo QuijadaA SehrawatL Valencia PalomoG AyalaH Castilla-ValdezE DeLa Cruz-Burelo I Heredia-De La CruzR Lopez-FernandezC A Mondragon HerreraD A Perez NavarroR Reyes-Almanza A Sánchez HernándezS Carrillo MorenoC Oropeza BarreraF Vazquez ValenciaI PedrazaH A Salazar IbarguenC Uribe EstradaJ MijuskovicN RaicevicD Krofcheck Philip H ButlerA AhmadM I AsgharA AwaisM I M AwanM GulH R 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NorbergA S BakshiV E Barnes R Chawla S DasL GutayM Jones A W Jung D KondratyevA M KoshyM LiuG NegroN NeumeisterG PaspalakiS PiperovA PurohitJ F SchulteM StojanovicJ Thieman F Wang R Xiao W Xie J DolenN ParasharD Acosta A BatyT CarnahanM DecaroS Dildick K M EcklundS FreedP GardnerF J M Geurts A KumarW LiB P PadleyR RedjimiJ RotterW Shi A G Stahl Leiton S YangL ZhangY Zhang A BodekP de BarbaroR Demina J L DulembaC FallonT FerbelM GalantiA Garcia-Bellido O HindrichsA KhukhunaishviliE RankenR TausG P Van OnsemK GoulianosB ChiaritoJ P Chou A Gandrakota Y Gershtein E HalkiadakisA HartM Heindl O KarachebanI LaflotteA LathR MontalvoK NashM OshersonS SalurS SchnetzerS SomalwarR StoneS A ThayilS ThomasH WangH AcharyaA G Delannoy S Fiorendi S Spanier Othmane Bouhali M Dalchenko A DelgadoR EusebiJ GilmoreT HuangT KamonH Kim S LuoS MalhotraR MuellerD OvertonD Rathjens A SafonovN AkchurinJ DamgovV HegdeK LamichhaneS W LeeT MengkeS Muthumuni T PeltolaI VolobouevZ WangA WhitbeckE AppeltS GreeneA GurrolaW JohnsA MeloK Padeken F Romeo P SheldonS TuoJ Velkovska M W ArentonB CardwellB Cox G Cummings J Hakala R Hirosky M Joyce A LedovskoyA LiC Neu C E Perez Lara B Tannenwald S White N PoudyalS BanerjeeK Black T Bose S Dasu I De Bruyn P EveraertsC GalloniH HeM HerndonA HerveU HussainA LanaroA LoeligerR LovelessJ Madhusudanan SreekalaA MallampalliA MohammadiD PinnaA SavinV ShangV Sharma W H SmithD TeagueS Trembath-ReichertW Vetensnull null

Published in: The European physical journal. C, Particles and fields (2022)

Using a data sample of s = 13 TeV proton-proton collisions collected by the CMS experiment at the LHC in 2017 and 2018 with an integrated luminosity of 103 fb - 1 , the B s 0 → ψ ( 2S ) K S 0 and B 0 → ψ ( 2S ) K S 0 π + π - decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond to B ( B s 0 → ψ ( 2S ) K S 0 ) / B ( B 0 → ψ ( 2S ) K S 0 ) = ( 3.33 ± 0.69 ( stat ) ± 0.11 ( syst ) ± 0.34 ( f s / f d ) ) × 10 - 2 and B ( B 0 → ψ ( 2S ) K S 0 π + π - ) / B ( B 0 → ψ ( 2S ) K S 0 ) = 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 B s 0 and B 0 mesons, f s / f d .

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