Measurement of theCP-Violating Phaseϕsin the DecayBs0→J/ψϕ

R Aaij,S Perazzini,M Matveev,S Filippov,V Egorychev,U Kerzel,H Ruiz,T Nakada,P E L Clarke,W Hulsbergen,J Wishahi,D Dossett,P Naik,A Falabella,D Hynds,A Leflat,Y Xie,Y M Kim,J Buytaert,M Needham,M Van Beuzekom,A Palano,R Oldeman,O Maev,H Dijkstra,D Esperante Pereira,M Schmelling,G Sabatino,T Blake,L Arrabito,T Latham,A Bondar,R Bernet,G Mcgregor,S Barsuk,C Langenbruch,A Kozlinskiy,A Grecu,V Romanovsky,S Blusk,A Bates,M Sannino,M Cattaneo,F Kruse,D Hutchcroft,G Corti,I Belyaev,M Charles,A Puig Navarro,G D Patel,S Furcas,L Zhang,E Picatoste Olloqui,C Bozzi,Ph Ghez,T Pilař,C Farinelli,M Sapunov,K Pal,B Popovici,P F Harrison,F J P Soler,V Tisserand,P Szczypka,E Graugés,P M Bjørnstad,F Constantin,N Torr,K Sobczak,R Forty,T Gys,M M Reid,S Eisenhardt,A Satta,R Lefèvre,V N La Thi,M Deckenhoff,L Li,S Malde,I Shapoval,G Penso,V Bocci,P David,G Wilkinson,G Bencivenni,E Aslanides,M Palutan,A Gomes,V Coco,J Mylroie-Smith,S Amato,L Estève,S Monteil,K Wyllie,A Papanestis,B Gui,C J Parkinson,M Whitehead,H Lu,H Voss,J Blouw,A Sarti,E Van Herwijnen,E Rodrigues,J Van Den Brand,C R Jones,G Carboni,J Molina Rodriguez,A Ukleja,R Graciani Diaz,I Nasteva,C Pavel-Nicorescu,B Khanji,V Pugatch,T Bird,A Shires,R M D Mamunur,S Ricciardi,C Matteuzzi,C Frei,J Imong,R B Appleby,D Savrina,J Dickens,I V Machikhiliyan,E Lopez Asamar,F Soomro,J J Back,P De Simone,F Alessio,P Gandini,B Sciascia,A Jaeger,L Eklund,W Barter,T Skwarnicki,M Knecht,J Garofoli,R Vazquez Gomez,L Shekhtman,S Stone,A Pellegrino,M Shapkin,W Qian,N H Brook,F Archilli,P Henrard,Yu Guz,J Anderson,M Adinolfi,A Mazurov,S Belogurov,B Muryn,F F Wilson,S Hansmann-Menzemer,R Schwemmer,S Bifani,M Kaballo,G Lanfranchi,B Liu,N Mangiafave,J Lefrançois,S A Wotton,C Parkes,A Zvyagin,S Schleich,K Carvalho Akiba,E Hicks,F Machefert,N Tuning,W Bonivento,M Lieng,D Moran,B Spaan,T J V Bowcock,S Redford,V V Gligorov,A Tsaregorodtsev,G Ciezarek,P Ilten,J Closier,P Alvarez Cartelle,P Diniz Batista,B Pietrzyk,M Fontana,J H Rademacker,M Grabalosa Gándara,W C Zhang,I Mous,F Teubert,E Fanchini,P Morawski,G Haefeli,F Stagni,C Färber,R Dzhelyadin,E Gushchin,C Coca,A Büchler-Germann,M Clemencic,J Magnin,B Maynard,M Jahjah Hussein,D Johnson,C D’Ambrosio,G Polok,V Fernandez Albor,M Szczekowski,I Bediaga,L De Paula,J Wang,R Märki,M Perrin-Terrin,D Websdale,O Schneider,D A Roa Romero,M Schlupp,R Harji,C Deplano,A Carbone,I R Kenyon,J Benton,J Serrano,G Valenti,J Rouvinet,R Jacobsson,M Gersabeck,R Currie,Y Shcheglov,H V Cliff,Ch Cauet,W Witzeling,M Merk,J Von Loeben,B Storaci,E Santovetti,N K Watson,R J Barlow,J He,G Fardell,G J Rogers,A Sparkes,E Greening,S Playfer,D Galli,V Fave,S Ogilvy,V Gibson,S Stahl,F Dordei,A Dovbnya,A Mac Raighne,A Novoselov,D R Ward,B Souza De Paula,M Coombes,R Santacesaria,N Serra,M Orlandea,P Spradlin,O Leroy,J Luisier,A Affolder,A C Dos Reis,I De Bonis,S Oggero,M Frosini,L Zhong,J H Lopes,M Gandelman,J Keaveney,M Musy,F De Lorenzi,G N Patrick,D Lambert,M John,A Bizzeti,M S Rangel,U Egede,A Massafferri,B 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Ubeda Garcia,E Thomas,B Schmidt,S Bachmann,G Passaleva,T M Karbach,T Hampson,P Koppenburg,R S Huston,M Patel,M Nicol,A A Alves,J Marks,B Viaud,G Raven,S Roiser,Z Yang,M Kreps,B Pie Valls,E Tournefier,M.-N Minard,A D Webber,D Gascon,J M De Miranda,G Alkhazov,A Dosil Suárez,P Robbe,C Satriano,J M Otalora Goicochea,J Panman,A Poluektov,R Ekelhof,C Thomas,C Linn,V Shevchenko,R Le Gac,M Schiller,J Albrecht,D Brett,R Mountain,G Manca,E Ben-Haim,K Ciba,P Owen,L Del Buono,S Wandernoth,E Smith,A Camboni,G Krocker,C Göbel,K Senderowska,R Nandakumar,N Bondar,A Pérez-Calero Yzquierdo,F Jing,O Callot,T Brambach,E Lanciotti,M Tobin,D Pinci,C Nguyen-Mau,A Bobrov,I Burducea,F Dettori,V Obraztsov,G Mancinelli,B Muster,V Balagura,C Salzmann,M Liles,A Comerma-Montells,P Sail,P Schaack,T Ketel,D Elsby,G Auriemma,L Carson,Th Bauer,I Raniuk,R W Lambert,A Vorobyev,A Powell,C Potterat,M Kucharczyk,A Cardini,O Okhrimenko,F Fontanelli,T Kvaratskheliya,P Shatalov,K Müller,J J Velthuis,Z Xing,N Neufeld,A 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Savrié ,F Ferreira Rodrigues ,J P Lees ,A C Smith ,A Pazos Álvarez ,M H Schune ,J Garra Ticó ,N López-March ,Z Máthé ,О Shevchenko ,M Ferro‐Luzzi ,P Vázquez Regueiro ,A Obłąkowska-Mucha ,J Višniakov ,D A Milanés ,J C Garnier ,D Décamp ,H A Gordon ,D Lacarrère ,M T Trân ,D Martínez Santos ,Д Деркач ,B Jean‐Marie ,А Артамонов ,M Roselló ,E G Zverev ,C Santamarina Ríos ,A Bień ,S Donleavy

doi:10.1103/physrevlett.108.101803

Abstract

We present a measurement of the time-dependent CP-violating asymmetry in B(s)(0) → J/ψϕ decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B(s)(0) → J/ψϕ is characterized by the decay widths Γ(H) and Γ(L) of the heavy and light mass eigenstates, respectively, of the B(s)(0) - B(s)(0) system and by a CP-violating phase ϕ(s). In a sample of about 8500 B(s)(0) → J/ψϕ events isolated from 0.37 fb(-1) of pp collisions at sqrt[s] = 7 TeV, we measure ϕ(s) = 0.15 ± 0.18(stat) ± 0.06(syst) rad. We also find an average B(s)(0) decay width Γ(s) ≡ (Γ(L) + Γ(H))/2 = 0.657 ± 0.009(stat) ± 0.008(syst) ps(-1) and a decay width difference ΔΓ(s) ≡ Γ(L) - Γ(H) = 0.123 ± 0.029(stat) ± 0.011(syst) ps(-1). Our measurement is insensitive to the transformation (ϕ(s),ΔΓ(s)) ↦ (π - ϕ(s), -ΔΓ(s)).

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