B⁺→ppK⁺衰变中CP破坏的证据。
Evidence for CP violation in B+ → ppK+ decays.
作者信息
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, 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, 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, Ruffini F, 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
机构信息
Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.
Universidad de Santiago de Compostela, Santiago de Compostela, Spain.
出版信息
Phys Rev Lett. 2014 Oct 3;113(14):141801. doi: 10.1103/PhysRevLett.113.141801. Epub 2014 Sep 29.
Three-body B+ → ppK+ and B(+) → ppπ(+) decays are studied using a data sample corresponding to an integrated luminosity of 3.0 fb(-1) collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV. Evidence of CP violation in the B(+) → ppK(+) decay is found in regions of the phase space, representing the first measurement of this kind for a final state containing baryons. Measurements of the forward-backward asymmetry of the light meson in the pp rest frame yield A(FB)(ppK(+),m(pp)<2.85 GeV/c(2)) = 0.495 ± 0.012 (stat) ± 0.007 (syst) and A(FB)(ppπ(+),m(pp) <2.85 GeV/c(2)) = -0.409 ± 0.033 (stat) ± 0.006 (syst). In addition, the branching fraction of the decay B(+) → Λ(1520)p is measured to be B(B(+) → Λ(1520)p) = (3.15 ± 0.48 (stat) ± 0.07 (syst) ± 0.26 (BF)) × 10(-7), where BF denotes the uncertainty on secondary branching fractions.
利用大型强子对撞机底夸克（LHCb）实验在质心能量为7和8 TeV的质子-质子碰撞中收集的对应于3.0 fb⁻¹积分亮度的数据样本，研究三体B⁺→ppK⁺和B⁺→ppπ⁺衰变。在相空间区域发现了B⁺→ppK⁺衰变中CP破坏的证据，这是对包含重子的末态进行的此类首次测量。在pp静止参考系中对轻介子的前后不对称性测量得到A(FB)(ppK⁺,m(pp)<2.85 GeV/c²) = 0.495±0.012（统计）±0.007（系统）和A(FB)(ppπ⁺,m(pp)<2.85 GeV/c²) = -0.409±0.033（统计）±0.006（系统）。此外，测得衰变B⁺→Λ(1520)p的分支比为B(B⁺→Λ(1520)p) = (3.15±0.48（统计）±0.07（系统）±0.26（分支分数）)×10⁻⁷，其中分支分数表示二级分支分数的不确定性。
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