The LHCb collaborationAaij R.Adeva B.Adinolfi M.Affolder A.Ajaltouni Z.Akar S.Albrecht J.Alessio F.Alexander M.Ali S.Alkhazov G.Alvarez Cartelle P.Alves A.A., Jr.Amato S.Amerio S.Amhis Y.An L.Anderlini L.Anderson J.Andreassen R.Andreotti M.Andrews J.E.Appleby R.B.Aquines Gutierrez O.Archilli F.Artamonov A.Artuso M.Aslanides E.Auriemma G.Baalouch M.Bachmann S.Back J.J.Badalov A.Baesso C.Baldini W.Barlow R.J.Barschel C.Barsuk S.Barter W.Batozskaya V.Battista V.Bay A.Beaucourt L.Beddow J.Bedeschi F.Bediaga I.Belogurov S.Belous K.Belyaev I.Ben-Haim E.Bencivenni G.Benson S.Benton J.Berezhnoy A.Bernet R.Bertolin A.B.Bettler M.-O.van Beuzekom M.Bien A.Bifani S.Bird T.Bizzeti A.Bjørnstad P.M.Blake T.Blanc F.Blouw J.Blusk S.Bocci V.Bondar A.Bondar N.Bonivento W.Borghi S.Borgia A.Borsato M.Bowcock T.J.V.Bowen E.Bozzi C.Brett D.Britsch M.Britton T.Brodzicka J.Brook N.H.Brown H.Bursche A.Buytaert J.Cadeddu S.Calabrese R.Calvi M.Calvo Gomez M.Campana P.Campora Perez D.Capriotti L.Carbone A.Carboni G.Cardinale R.Cardini A.Carson L.Carvalho Akiba K.Casanova Mohr R.C.M.Casse G.Cassina L.Castillo Garcia L.Cattaneo M.Cauet C.Cenci R.Charles M.Charpentier P.Chefdeville M.Chen S.Cheung S.-F.Chiapolini N.Chrzaszcz M.Cid Vidal X.Ciezarek G.Clarke P.E.L.Clemencic M.Cliff H.V.Closier J.Coco V.Cogan J.Cogneras E.Cogoni V.Cojocariu L.Collazuol G.Collins P.Comerma-Montells A.Contu A.Cook A.Coombes M.Coquereau S.Corti G.Corvo M.Counts I.Couturier B.Cowan G.A.Craik D.C.Crocombe A.C.Cruz Torres M.Cunliffe S.Currie R.D’Ambrosio C.Dalseno J.David P.David P.N.Y.Davis A.De Bruyn K.De Capua S.De Cian M.De Miranda J.M.De Paula L.De Silva W.De Simone P.Dean C.-T.Decamp D.Deckenhoff M.Del Buono L.Déléage N.Derkach D.Deschamps O.Dettori F.Di Canto A.Dijkstra H.Donleavy S.Dordei F.Dorigo M.Dosil Suárez A.Dossett D.Dovbnya A.Dreimanis K.Dujany G.Dupertuis F.Durante P.Dzhelyadin R.Dziurda A.Dzyuba A.Easo S.Egede U.Egorychev V.Eidelman S.Eisenhardt S.Eitschberger U.Ekelhof R.Eklund L.El Rifai I.Elsasser C.Ely S.Esen S.Evans H.-M.Evans T.Falabella A.Färber C.Farinelli C.Farley N.Farry S.Fay R.Ferguson D.Fernandez Albor V.Ferreira Rodrigues F.Ferro-Luzzi M.Filippov S.Fiore M.Fiorini M.Firlej M.Fitzpatrick C.Fiutowski T.Fol P.Fontana M.Fontanelli F.Forty R.Francisco O.Frank M.Frei C.Frosini M.Fu J.Furfaro E.Gallas Torreira A.Galli D.Gallorini S.Gambetta S.Gandelman M.Gandini P.Gao Y.García Pardiñas J.Garofoli J.Garra Tico J.Garrido L.Gascon D.Gaspar C.Gastaldi U.Gauld R.Gavardi L.Gazzoni G.Geraci A.Gersabeck E.Gersabeck M.Gershon T.Ghez P.Gianelle A.Gianí S.Gibson V.Giubega L.Gligorov V.V.Göbel C.Golubkov D.Golutvin A.Gomes A.Gotti C.Grabalosa Gándara M.Graciani Diaz R.Granado Cardoso L.A.Graugés E.Graverini E.Graziani G.Grecu A.Greening E.Gregson S.Griffith P.Grillo L.Grünberg O.Gui B.Gushchin E.Guz Y.Gys T.Hadjivasiliou C.Haefeli G.Haen C.Haines S.C.Hall S.Hamilton B.Hampson T.Han X.Hansmann-Menzemer S.Harnew N.Harnew S.T.Harrison J.He J.Head T.Heijne V.Hennessy K.Henrard P.Henry L.Hernando Morata J.A.van Herwijnen E.Heß M.Hicheur A.Hill D.Hoballah M.Hombach C.Hulsbergen W.Hussain N.Hutchcroft D.Hynds D.Idzik M.Ilten P.Jacobsson R.Jaeger A.Jalocha J.Jans E.Jaton P.Jawahery A.Jing F.John M.Johnson D.Jones C.R.Joram C.Jost B.Jurik N.Kandybei S.Kanso W.Karacson M.Karbach T.M.Karodia S.Kelsey M.Kenyon I.R.Ketel T.Khanji B.Khurewathanakul C.Klaver S.Klimaszewski K.Kochebina O.Kolpin M.Komarov I.Koopman R.F.Koppenburg P.Korolev M.Kravchuk L.Kreplin K.Kreps M.Krocker G.Krokovny P.Kruse F.Kucewicz W.Kucharczyk M.Kudryavtsev V.Kurek K.Kvaratskheliya T.La Thi V.N.Lacarrere D.Lafferty G.Lai A.Lambert D.Lambert R.W.Lanfranchi G.Langenbruch C.Langhans B.Latham T.Lazzeroni C.Le Gac R.van Leerdam J.Lees J.-P.Lefèvre R.Leflat A.Lefrançois J.Leo S.Leroy O.Lesiak T.Leverington B.Li Y.Likhomanenko T.Liles M.Lindner R.Linn C.Lionetto F.Liu B.Lohn S.Longstaff I.Lopes J.H.Lowdon P.Lucchesi D.Luo H.Lupato A.Luppi E.Lupton O.Machefert F.Machikhiliyan I.V.Maciuc F.Maev O.Malde S.Malinin A.Manca G.Mancinelli G.Mapelli A.Maratas J.Marchand J.F.Marconi U.Marin Benito C.Marino P.Märki R.Marks J.Martellotti G.Martín Sánchez A.Martinelli M.Martinez Santos D.Martinez Vidal F.Martins Tostes D.Massafferri A.Matev R.Mathe Z.Matteuzzi C.Mazurov A.McCann M.McCarthy J.McNab A.McNulty R.McSkelly B.Meadows B.Meier F.Meissner M.Merk M.Milanes D.A.Minard M.-N.Moggi N.Molina Rodriguez J.Monteil S.Morandin M.Morawski P.Mordà A.Morello M.J.Moron J.Morris A.-B.Mountain R.Muheim F.Müller K.Mussini M.Muster B.Naik P.Nakada T.Nandakumar R.Nasteva I.Needham M.Neri N.Neubert S.Neufeld N.Neuner M.Nguyen A.D.Nguyen T.D.Nguyen-Mau C.Nicol M.Niess V.Niet R.Nikitin N.Nikodem T.Novoselov A.O’Hanlon D.P.Oblakowska-Mucha A.Obraztsov V.Oggero S.Ogilvy S.Okhrimenko O.Oldeman R.Onderwater C.J.G.Orlandea M.Otalora Goicochea J.M.Otto A.Owen P.Oyanguren A.Pal B.K.Palano A.Palombo F.Palutan M.Panman J.Papanestis A.Pappagallo M.Pappalardo L.L.Parkes C.Parkinson C.J.Passaleva G.Patel G.D.Patel M.Patrignani C.Pearce A.Pellegrino A.Penso G.Pepe Altarelli M.Perazzini S.Perret P.Perrin-Terrin M.Pescatore L.Pesen E.Petridis K.Petrolini A.Picatoste Olloqui E.Pietrzyk B.Pilař T.Pinci D.Pistone A.Playfer S.Plo Casasus M.Polci F.Polikarpov S.Poluektov A.Polyakov I.Polycarpo E.Popov A.Popov D.Popovici B.Potterat C.Price E.Price J.D.Prisciandaro J.Pritchard A.Prouve C.Pugatch V.Puig Navarro A.Punzi G.Qian W.Rachwal B.Rademacker J.H.Rakotomiaramanana B.Rama M.Rangel M.S.Raniuk I.Rauschmayr N.Raven G.Redi F.Reichert S.Reid M.M.dos Reis A.C.Ricciardi S.Richards S.Rihl M.Rinnert K.Rives Molina V.Robbe P.Rodrigues A.B.Rodrigues E.Rodriguez Perez P.Roiser S.Romanovsky V.Romero Vidal A.Rotondo M.Rouvinet J.Ruf T.Ruiz H.Ruiz Valls P.Saborido Silva J.J.Sagidova N.Sail P.Saitta B.Salustino Guimaraes V.Sanchez Mayordomo C.Sanmartin Sedes B.Santacesaria R.Santamarina Rios C.Santovetti E.Sarti A.Satriano C.Satta A.Saunders D.M.Savrina D.Schiller M.Schindler H.Schlupp M.Schmelling M.Schmidt B.Schneider O.Schopper A.Schune M.-H.Schwemmer R.Sciascia B.Sciubba A.Semennikov A.Sepp I.Serra N.Serrano J.Sestini L.Seyfert P.Shapkin M.Shapoval I.Shcheglov Y.Shears T.Shekhtman L.Shevchenko V.Shires A.Silva Coutinho R.Simi G.Sirendi M.Skidmore N.Skillicorn I.Skwarnicki T.Smith N.A.Smith E.Smith E.Smith J.Smith M.Snoek H.Sokoloff M.D.Soler F.J.P.Soomro F.Souza D.Souza De Paula B.Spaan B.Spradlin P.Sridharan S.Stagni F.Stahl M.Stahl S.Steinkamp O.Stenyakin O.Stevenson S.Stoica S.Stone S.Storaci B.Stracka S.Straticiuc M.Straumann U.Stroili R.Sun L.Sutcliffe W.Swientek K.Swientek S.Syropoulos V.Szczekowski M.Szczypka P.Szumlak T.T’Jampens S.Teklishyn M.Tellarini G.Teubert F.Thomas C.Thomas E.van Tilburg J.Tisserand V.Tobin M.Todd J.Tolk S.Tomassetti L.Tonelli D.Topp-Joergensen S.Torr N.Tournefier E.Tourneur S.Tran M.T.Tresch M.Trisovic A.Tsaregorodtsev A.Tsopelas P.Tuning N.Ubeda Garcia M.Ukleja A.Ustyuzhanin A.Uwer U.Vacca C.Vagnoni V.Valenti G.Vallier A.Vazquez Gomez R.Vazquez Regueiro P.Vázquez Sierra C.Vecchi S.Velthuis J.J.Veltri M.Veneziano G.Vesterinen M.Viaud B.Vieira D.Vieites Diaz M.Vilasis-Cardona X.Vollhardt A.Volyanskyy D.Voong D.Vorobyev A.Vorobyev V.Voß C.de Vries J.A.Waldi R.Wallace C.Wallace R.Walsh J.Wandernoth S.Wang J.Ward D.R.Watson N.K.Websdale D.Whitehead M.Wiedner D.Wilkinson G.Wilkinson M.Williams M.P.Williams M.Wilschut H.W.Wilson F.F.Wimberley J.Wishahi J.Wislicki W.Witek M.Wormser G.Wotton S.A.Wright S.Wyllie K.Xie Y.Xing Z.Xu Z.Yang Z.Yuan X.Yushchenko O.Zangoli M.Zavertyaev M.Zhang L.Zhang W.C.Zhang Y.Zhelezov A.Zhokhov A.Zhong L.2024-07-222024-07-22201510298479http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/16565Abstract: A study of B and Bs meson decays into J/ψ η and J/ψ η′ final states is performed using a data set of proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, collected by the LCHb experiment and corresponding to 3.0 fb−1 of integrated luminosity. The decay B0 → J/ψ η′ is observed for the first time. The following ratios of branching fractions are measured: (Formula Presented) where the third uncertainty is related to the present knowledge of fs/fd, the ratio between the probabilities for a b quark to form a Bs or a B0 meson. The branching fraction ratios are used to determine the parameters of η − η′ meson mixing. In addition, the first evidence for the decay Bs → ψ(2S)η′ is reported, and the relative branching fraction is measured, (Formula Presented) where the third uncertainty is due to the limited knowledge of the branching fractions of J/ψ and ψ(2S) mesons. © 2015, The Author(s).EnglishAll Open Access; Gold Open AccessArticle10.1007/JHEP01(2015)024