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Using decays to ϕ-meson pairs, the inclusive production of charmonium states in b-hadron decays is studied with pp collision data corresponding to an integrated luminosity of 3.0fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. Denoting by BC≡B(b→CX)×B(C) the inclusive branching fraction of a b hadron to a charmonium state C that decays into a pair of ϕ mesons, ratios RC2C1≡BC1/BC2 are determined as Rηc(1S)χc0=0.147±0.023±0.011, Rηc(1S)χc1=0.073±0.016±0.006, Rηc(1S)χc2=0.081±0.013±0.005, Rχc0χc1=0.50±0.11±0.01, Rχc0χc2=0.56±0.10±0.01 and Rηc(1S)ηc(2S)=0.040±0.011±0.004. Here and below the first uncertainties are statistical and the second systematic. Upper limits at 90% confidence level for the inclusive production of X(3872), X(3915) and χ c2(2 P) states are obtained as Rχc1X(3872)<0.34, Rχc0X(3915)<0.12 and Rχc2χc2(2P)<0.16. Differential cross-sections as a function of transverse momentum are measured for the ηc(1 S) and χc states. The branching fraction of the decay Bs0 is measured for the first time, B(Bs0)=(2.15±0.54±0.28±0.21B)×10-6. Here the third uncertainty is due to the branching fraction of the decay Bs0, which is used for normalization. No evidence for intermediate resonances is seen. A preferentially transverse ϕ polarization is observed. The measurements allow the determination of the ratio of the branching fractions for the ηc(1 S) decays to ϕϕ and pp¯ as B(ηc(1S))/B(ηc(1S)→pp¯)=1.79±0.14±0.32.
Study of charmonium production in b -hadron decays and first evidence for the decay Bs0 / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 77:9(2017), pp. N/A-N/A. [10.1140/epjc/s10052-017-5151-8]
Study of charmonium production in b -hadron decays and first evidence for the decay Bs0
Aaij R.;Adeva B.;Adinolfi M.;Ajaltouni Z.;Akar S.;Albrecht J.;Alessio F.;Alexander M.;Ali S.;Alkhazov G.;Alvarez Cartelle P.;Alves A. A.;Amato S.;Amerio S.;Amhis Y.;An L.;Anderlini L.;Andreassi G.;Andreotti M.;Andrews J. E.;Appleby R. B.;Archilli F.;d'Argent P.;Arnau Romeu J.;Artamonov A.;Artuso M.;Aslanides E.;Auriemma G.;Baalouch M.;Babuschkin I.;Bachmann S.;Back J. J.;Badalov A.;Baesso C.;Baker S.;Balagura V.;Baldini W.;Baranov A.;Barlow R. J.;Barschel C.;Barsuk S.;Barter W.;Baryshnikov F.;Baszczyk M.;Batozskaya V.;Battista V.;Bay A.;Beaucourt L.;Beddow J.;Bedeschi F.;Bediaga I.;Beiter A.;Bel L. J.;Bellee V.;Belloli N.;Belous K.;Belyaev I.;Ben-Haim E.;Bencivenni G.;Benson S.;Beranek S.;Berezhnoy A.;Bernet R.;Bertolin A.;Betancourt C.;Betti F.;Bettler M. -O.;van Beuzekom M.;Bezshyiko I.;Bifani S.;Billoir P.;Birnkraut A.;Bitadze A.;Bizzeti A.;Blake T.;Blanc F.;Blouw J.;Blusk S.;Bocci V.;Boettcher T.;Bondar A.;Bondar N.;Bonivento W.;Bordyuzhin I.;Borgheresi A.;Borghi S.;Borisyak M.;Borsato M.;Bossu F.;Boubdir M.;Bowcock T. J. V.;Bowen E.;Bozzi C.;Braun S.;Britton T.;Brodzicka J.;Buchanan E.;Burr C.;Bursche A.;Buytaert J.;Cadeddu S.;Calabrese R.;Calvi M.;Calvo Gomez M.;Camboni A.;Campana P.;Campora Perez D. H.;Capriotti L.;Carbone A.;Carboni G.;Cardinale R.;Cardini A.;Carniti P.;Carson L.;Carvalho Akiba K.;Casse G.;Cassina L.;Castillo Garcia L.;Cattaneo M.;Cavallero G.;Cenci R.;Chamont D.;Charles M.;Charpentier P.;Chatzikonstantinidis G.;Chefdeville M.;Chen S.;Cheung S. F.;Chobanova V.;Chrzaszcz M.;Chubykin A.;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.;Collins P.;Comerma-Montells A.;Contu A.;Cook A.;Coombs G.;Coquereau S.;Corti G.;Corvo M.;Costa Sobral C. M.;Couturier B.;Cowan G. A.;Craik D. C.;Crocombe A.;Cruz Torres M.;Currie R.;D'Ambrosio C.;Da Cunha Marinho F.;Dall'Occo E.;Dalseno J.;Davis A.;De Bruyn K.;De Capua S.;De Cian M.;De Miranda J. M.;De Paula L.;De Serio M.;De Simone P.;Dean C. T.;Decamp D.;Deckenhoff M.;Del Buono L.;Dembinski H. -P.;Demmer M.;Dendek A.;Derkach D.;Deschamps O.;Dettori F.;Dey B.;Di Canto A.;Di Nezza P.;Dijkstra H.;Dordei F.;Dorigo M.;Dosil Suarez A.;Dovbnya A.;Dreimanis K.;Dufour L.;Dujany G.;Dungs K.;Durante P.;Dzhelyadin R.;Dziewiecki M.;Dziurda A.;Dzyuba A.;Deleage N.;Easo S.;Ebert M.;Egede U.;Egorychev V.;Eidelman S.;Eisenhardt S.;Eitschberger U.;Ekelhof R.;Eklund L.;Ely S.;Esen S.;Evans H. M.;Evans T.;Falabella A.;Farley N.;Farry S.;Fay R.;Fazzini D.;Ferguson D.;Fernandez G.;Fernandez Prieto A.;Ferrari F.;Ferreira Rodrigues F.;Ferro-Luzzi M.;Filippov S.;Fini R. A.;Fiore M.;Fiorini M.;Firlej M.;Fitzpatrick C.;Fiutowski T.;Fleuret F.;Fohl K.;Fontana M.;Fontanelli F.;Forshaw D. C.;Forty R.;Franco Lima V.;Frank M.;Frei C.;Fu J.;Funk W.;Furfaro E.;Farber C.;Gallas Torreira A.;Galli D.;Gallorini S.;Gambetta S.;Gandelman M.;Gandini P.;Gao Y.;Garcia Martin L. M.;Garcia Pardinas J.;Garra Tico J.;Garrido L.;Garsed P. J.;Gascon D.;Gaspar C.;Gavardi L.;Gazzoni G.;Gerick D.;Gersabeck E.;Gersabeck M.;Gershon T.;Ghez P.;Giani S.;Gibson V.;Girard O. G.;Giubega L.;Gizdov K.;Gligorov V. V.;Golubkov D.;Golutvin A.;Gomes A.;Gorelov I. V.;Gotti C.;Govorkova E.;Graciani Diaz R.;Granado Cardoso L. A.;Grauges E.;Graverini E.;Graziani G.;Grecu A.;Greim R.;Griffith P.;Grillo L.;Gruberg Cazon B. R.;Grunberg O.;Gushchin E.;Guz Y.;Gys T.;Gobel C.;Hadavizadeh T.;Hadjivasiliou C.;Haefeli G.;Haen C.;Haines S. C.;Hamilton B.;Han X.;Hansmann-Menzemer S.;Harnew N.;Harnew S. T.;Harrison J.;Hatch M.;He J.;Head T.;Heister A.;Hennessy K.;Henrard P.;Henry L.;van Herwijnen E.;Hess M.;Hicheur A.;Hill D.;Hombach C.;Hopchev P. H.;Huard Z. -C.;Hulsbergen W.;Humair T.;Hushchyn M.;Hutchcroft D.;Idzik M.;Ilten P.;Jacobsson R.;Jalocha J.;Jans E.;Jawahery A.;Jiang F.;John M.;Johnson D.;Jones C. R.;Joram C.;Jost B.;Jurik N.;Kandybei S.;Karacson M.;Kariuki J. M.;Karodia S.;Kecke M.;Kelsey M.;Kenzie M.;Ketel T.;Khairullin E.;Khanji B.;Khurewathanakul C.;Kirn T.;Klaver S.;Klimaszewski K.;Klimkovich T.;Koliiev S.;Kolpin M.;Komarov I.;Kopecna R.;Koppenburg P.;Kosmyntseva A.;Kotriakhova S.;Kozeiha M.;Kravchuk L.;Kreps M.;Krokovny P.;Kruse F.;Krzemien W.;Kucewicz W.;Kucharczyk M.;Kudryavtsev V.;Kuonen A. K.;Kurek K.;Kvaratskheliya T.;Lacarrere D.;Lafferty G.;Lai A.;Lanfranchi G.;Langenbruch C.;Latham T.;Lazzeroni C.;Le Gac R.;van Leerdam J.;Leflat A.;Lefrancois J.;Lefevre R.;Lemaitre F.;Lemos Cid E.;Leroy O.;Lesiak T.;Leverington B.;Li T.;Li Y.;Li Z.;Likhomanenko T.;Lindner R.;Lionetto F.;Liu X.;Loh D.;Longstaff I.;Lopes J. H.;Lucchesi D.;Lucio Martinez M.;Luo H.;Lupato A.;Luppi E.;Lupton O.;Lusiani A.;Lyu X.;Machefert F.;Maciuc F.;Maev O.;Maguire K.;Malde S.;Malinin A.;Maltsev T.;Manca G.;Mancinelli G.;Manning P.;Maratas J.;Marchand J. F.;Marconi U.;Marin Benito C.;Marinangeli M.;Marino P.;Marks J.;Martellotti G.;Martin M.;Martinelli M.;Martinez Santos D.;Martinez Vidal F.;Martins Tostes D.;Massacrier L. M.;Massafferri A.;Matev R.;Mathad A.;Mathe Z.;Matteuzzi C.;Mauri A.;Maurice E.;Maurin B.;Mazurov A.;McCann M.;McNab A.;McNulty R.;Meadows B.;Meier F.;Melnychuk D.;Merk M.;Merli A.;Michielin E.;Milanes D. A.;Minard M. -N.;Mitzel D. S.;Mogini A.;Molina Rodriguez J.;Monroy I. A.;Monteil S.;Morandin M.;Morello M. J.;Morgunova O.;Moron J.;Morris A. B.;Mountain R.;Muheim F.;Mulder M.;Mussini M.;Muller D.;Muller J.;Muller K.;Muller V.;Naik P.;Nakada T.;Nandakumar R.;Nandi A.;Nasteva I.;Needham M.;Neri N.;Neubert S.;Neufeld N.;Neuner M.;Nguyen T. D.;Nguyen-Mau C.;Nieswand S.;Niet R.;Nikitin N.;Nikodem T.;Nogay A.;Novoselov A.;O'Hanlon D. P.;Oblakowska-Mucha A.;Obraztsov V.;Ogilvy S.;Oldeman R.;Onderwater C. J. G.;Ossowska A.;Otalora Goicochea J. M.;Owen P.;Oyanguren A.;Pais P. R.;Palano A.;Palutan M.;Papanestis A.;Pappagallo M.;Pappalardo L. L.;Pappenheimer C.;Parker W.;Parkes C.;Passaleva G.;Pastore A.;Patel M.;Patrignani C.;Pearce A.;Pellegrino A.;Penso G.;Pepe Altarelli M.;Perazzini S.;Perret P.;Pescatore L.;Petridis K.;Petrolini A.;Petrov A.;Petruzzo M.;Picatoste Olloqui E.;Pietrzyk B.;Pikies M.;Pinci D.;Pistone A.;Piucci A.;Placinta V.;Playfer S.;Plo Casasus M.;Poikela T.;Polci F.;Poli Lener M.;Poluektov A.;Polyakov I.;Polycarpo E.;Pomery G. J.;Ponce S.;Popov A.;Popov D.;Popovici B.;Poslavskii S.;Potterat C.;Price E.;Prisciandaro J.;Prouve C.;Pugatch V.;Puig Navarro A.;Punzi G.;Qian W.;Quagliani R.;Rachwal B.;Rademacker J. H.;Rama M.;Ramos Pernas M.;Rangel M. S.;Raniuk I.;Ratnikov F.;Raven G.;Redi F.;Reichert S.;dos Reis A. C.;Remon Alepuz C.;Renaudin V.;Ricciardi S.;Richards S.;Rihl M.;Rinnert K.;Rives Molina V.;Robbe P.;Rodrigues A. B.;Rodrigues E.;Rodriguez Lopez J. A.;Rodriguez Perez P.;Rogozhnikov A.;Roiser S.;Rollings A.;Romanovskiy V.;Romero Vidal A.;Ronayne J. W.;Rotondo M.;Rudolph M. S.;Ruf T.;Ruiz Valls P.;Saborido Silva J. J.;Sadykhov E.;Sagidova N.;Saitta B.;Salustino Guimaraes V.;Sanchez Gonzalo D.;Sanchez Mayordomo C.;Sanmartin Sedes B.;Santacesaria R.;Santamarina Rios C.;Santimaria M.;Santovetti E.;Sarti A.;Satriano C.;Satta A.;Saunders D. M.;Savrina D.;Schael S.;Schellenberg M.;Schiller M.;Schindler H.;Schlupp M.;Schmelling M.;Schmelzer T.;Schmidt B.;Schneider O.;Schopper A.;Schreiner H. F.;Schubert K.;Schubiger M.;Schune M. -H.;Schwemmer R.;Sciascia B.;Sciubba A.;Semennikov A.;Sergi A.;Serra N.;Serrano J.;Sestini L.;Seyfert P.;Shapkin M.;Shapoval I.;Shcheglov Y.;Shears T.;Shekhtman L.;Shevchenko V.;Siddi B. G.;Silva Coutinho R.;Silva de Oliveira L.;Simi G.;Simone S.;Sirendi M.;Skidmore N.;Skwarnicki T.;Smith E.;Smith I. T.;Smith J.;Smith M.;Soares Lavra L.;Sokoloff M. D.;Soler F. J. P.;Souza De Paula B.;Spaan B.;Spradlin P.;Sridharan S.;Stagni F.;Stahl M.;Stahl S.;Stefko P.;Stefkova S.;Steinkamp O.;Stemmle S.;Stenyakin O.;Stevens H.;Stoica S.;Stone S.;Storaci B.;Stracka S.;Stramaglia M. E.;Straticiuc M.;Straumann U.;Sun L.;Sutcliffe W.;Swientek K.;Syropoulos V.;Szczekowski M.;Szumlak T.;T'Jampens S.;Tayduganov A.;Tekampe T.;Teklishyn M.;Tellarini G.;Teubert F.;Thomas E.;van Tilburg J.;Tilley M. J.;Tisserand V.;Tobin M.;Tolk S.;Tomassetti L.;Tonelli D.;Topp-Joergensen S.;Toriello F.;Tourinho Jadallah Aoude R.;Tournefier E.;Tourneur S.;Trabelsi K.;Traill M.;Tran M. T.;Tresch M.;Trisovic A.;Tsaregorodtsev A.;Tsopelas P.;Tully A.;Tuning N.;Ukleja A.;Usachov A.;Ustyuzhanin A.;Uwer U.;Vacca C.;Vagnoni V.;Valassi A.;Valat S.;Valenti G.;Vazquez Gomez R.;Vazquez Regueiro P.;Vecchi S.;van Veghel M.;Velthuis J. J.;Veltri M.;Veneziano G.;Venkateswaran A.;Verlage T. A.;Vernet M.;Vesterinen M.;Viana Barbosa J. V.;Viaud B.;Vieira D.;Vieites Diaz M.;Viemann H.;Vilasis-Cardona X.;Vitti M.;Volkov V.;Vollhardt A.;Voneki B.;Vorobyev A.;Vorobyev V.;Voss C.;de Vries J. A.;Vazquez Sierra C.;Waldi R.;Wallace C.;Wallace R.;Walsh J.;Wang J.;Ward D. R.;Wark H. M.;Watson N. K.;Websdale D.;Weiden A.;Whitehead M.;Wicht J.;Wilkinson G.;Wilkinson M.;Williams M.;Williams M. P.;Williams M.;Williams T.;Wilson F. F.;Wimberley J.;Winn M. A.;Wishahi J.;Wislicki W.;Witek M.;Wormser G.;Wotton S. A.;Wraight K.;Wyllie K.;Xie Y.;Xu Z.;Yang Z.;Yang Z.;Yao Y.;Yin H.;Yu J.;Yuan X.;Yushchenko O.;Zarebski K. A.;Zavertyaev M.;Zhang L.;Zhang Y.;Zhelezov A.;Zheng Y.;Zhu X.;Zhukov V.;Zucchelli S.
2017
Abstract
Using decays to ϕ-meson pairs, the inclusive production of charmonium states in b-hadron decays is studied with pp collision data corresponding to an integrated luminosity of 3.0fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. Denoting by BC≡B(b→CX)×B(C) the inclusive branching fraction of a b hadron to a charmonium state C that decays into a pair of ϕ mesons, ratios RC2C1≡BC1/BC2 are determined as Rηc(1S)χc0=0.147±0.023±0.011, Rηc(1S)χc1=0.073±0.016±0.006, Rηc(1S)χc2=0.081±0.013±0.005, Rχc0χc1=0.50±0.11±0.01, Rχc0χc2=0.56±0.10±0.01 and Rηc(1S)ηc(2S)=0.040±0.011±0.004. Here and below the first uncertainties are statistical and the second systematic. Upper limits at 90% confidence level for the inclusive production of X(3872), X(3915) and χ c2(2 P) states are obtained as Rχc1X(3872)<0.34, Rχc0X(3915)<0.12 and Rχc2χc2(2P)<0.16. Differential cross-sections as a function of transverse momentum are measured for the ηc(1 S) and χc states. The branching fraction of the decay Bs0 is measured for the first time, B(Bs0)=(2.15±0.54±0.28±0.21B)×10-6. Here the third uncertainty is due to the branching fraction of the decay Bs0, which is used for normalization. No evidence for intermediate resonances is seen. A preferentially transverse ϕ polarization is observed. The measurements allow the determination of the ratio of the branching fractions for the ηc(1 S) decays to ϕϕ and pp¯ as B(ηc(1S))/B(ηc(1S)→pp¯)=1.79±0.14±0.32.
Study of charmonium production in b -hadron decays and first evidence for the decay Bs0 / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 77:9(2017), pp. N/A-N/A. [10.1140/epjc/s10052-017-5151-8]
Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1209657
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