Aaij 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, 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, 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, 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, Brambach T, van den Brand J, Bressieux J, Brett D, Britsch M, Britton T, Brodzicka J, Brook N H, Brown H, Bursche A, Busetto G, Buytaert J, Cadeddu S, Calabrese R, Calvi M, Calvo Gomez M, Campana P, Campora Perez D, Carbone A, Carboni G, Cardinale R, Cardini A, Carson L, Carvalho Akiba K, Casse G, Cassina L, Castillo Garcia L, Cattaneo M, Cauet Ch, Cenci R, Charles M, Charpentier Ph, Chefdeville M, Chen S, Cheung S-F, Chiapolini N, Chrzaszcz M, Ciba K, Cid Vidal X, Ciezarek G, Clarke P E L, Clemencic M, Cliff H V, Closier J, Coco V, Cogan J, Cogneras E, Cojocariu L, 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, 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, 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 Ch, Ely S, Esen S, Evans H-M, Evans T, Falabella A, Färber C, Farinelli C, Farley N, Farry S, Fay Rf, Ferguson D, Fernandez Albor V, Ferreira Rodrigues F, Ferro-Luzzi M, Filippov S, Fiore M, Fiorini M, Firlej M, Fitzpatrick C, Fiutowski T, 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, Gaspar C, Gauld R, Gavardi L, Gavrilov G, Geraci A, Gersabeck E, Gersabeck M, Gershon T, Ghez Ph, Gianelle A, Giani' 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, Graziani G, Grecu A, Greening E, Gregson S, Griffith P, Grillo L, Grünberg O, Gui B, Gushchin E, Guz Yu, 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, Hunt P, 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, Kaballo M, 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, Kozlinskiy A, 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, Lopez-March N, Lowdon P, Lu H, 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, Maratas J, Marchand J F, Marconi U, Marin Benito C, Marino P, Märki R, Marks J, Martellotti G, Martens A, 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 G, Orlandea M, Otalora Goicochea J M, 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, Pazos Alvarez A, Pearce A, Pellegrino A, Pepe Altarelli M, Perazzini S, Perez Trigo E, 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, Poluektov A, Polycarpo E, Popov A, Popov D, Popovici B, Potterat C, Price E, 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, Reichert S, Reid M M, Dos Reis A C, Ricciardi S, Richards S, Rihl M, Rinnert K, Rives Molina V, Roa Romero D A, 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, Savrie 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, Seco M, 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, 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, Sparkes A, 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, Subbiah V K, Sun L, Sutcliffe W, Swientek K, Swientek S, Syropoulos V, Szczekowski M, Szczypka P, Szilard D, Szumlak T, T'Jampens S, Teklishyn M, Tellarini G, Teubert F, Thomas C, Thomas E, van Tilburg J, Tisserand V, Tobin M, Tolk S, Tomassetti L, Tonelli D, Topp-Joergensen S, Torr N, Tournefier E, Tourneur S, Tran M T, Tresch M, Tsaregorodtsev A, Tsopelas P, Tuning N, Ubeda Garcia M, Ukleja A, Ustyuzhanin A, Uwer U, 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, Voss H, 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, Wicht J, Wiedner D, Wilkinson G, Williams M P, Williams M, Wilson F F, Wimberley J, Wishahi J, Wislicki W, Witek M, Wormser G, Wotton S A, Wright S, Wu 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, Zvyagin A
Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.
Universidad de Santiago de Compostela, Santiago de Compostela, Spain.
Phys Rev Lett. 2014 Oct 10;113(15):152003. doi: 10.1103/PhysRevLett.113.152003.
A baryonic decay of the B(c)(+) meson, B(c)(+) → J/ψppπ(+), is observed for the first time, with a significance of 7.3 standard deviations, in pp collision data collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb(-1) taken at center-of-mass energies of 7 and 8 TeV. With the B(c)(+) → J/ψπ(+) decay as the normalization channel, the ratio of branching fractions is measured to be B(B(c)(+) → J/ψppπ(+))/B(B(c)(+) → J/ψπ(+)) = 0.143(-0.034)(+0.039)(stat) ± 0.013(syst). The mass of the B(c)(+) meson is determined as M(B(c)(+) = 6274.0 ± 1.8(stat) ± 0.4(syst) MeV/c(2), using the B(c)(+) → J/ψppπ(+) channel.
在大型强子对撞机底夸克探测器（LHCb）收集的质子-质子（pp）碰撞数据中，首次观测到B（c）（+）介子的重子衰变B（c）（+）→J/ψppπ（+），显著性为7.3个标准差，对应于在质心能量为7和8 TeV时采集的3.0 fb（-1）的积分亮度。以B（c）（+）→J/ψπ（+）衰变作为归一化通道，测得分支比之比为B（B（c）（+）→J/ψppπ（+））/B（B（c）（+）→J/ψπ（+）） = 0.143（-0.034）（+0.039）（统计）±0.013（系统）。利用B（c）（+）→J/ψppπ（+）通道，确定B（c）（+）介子的质量为M（B（c）（+）） = 6274.0 ± 1.8（统计）±0.4（系统）MeV/c²。
