Observation Of Two New Xi(-)(B) Baryon Resonances
LHCb collaboration, R. Aaij,B. Adeva,M. Adinolfi,A. Affolder, Z. Ajaltouni,S. Akar,J. Albrecht, F. Alessio,M. Alexander,S. Ali, G. Alkhazov,P. Alvarez Cartelle,A. A. Alves Jr, S. Amato,S. Amerio,Y. Amhis,L. An,L. Anderlini, J. Anderson, R. Andreassen, M. Andreotti,J. E. Andrews,R. B. Appleby,O. Aquines Gutierrez,F. Archilli, A. Artamonov,M. Artuso, E. Aslanides,G. Auriemma,M. Baalouch,S. Bachmann, J. J. Back,A. Badalov,C. Baesso, W. Baldini, R. J. Barlow,C. Barschel, S. Barsuk,W. Barter, V. Batozskaya, V. Battista, A. Bay,L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga,S. Belogurov, K. Belous,I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, A. Bertolin,M. -O. Bettler,M. van Beuzekom,A. Bien,S. Bifani,T. Bird, A. Bizzeti, P. M. Bjørnstad,T. Blake, F. Blanc,J. Blouw,S. Blusk,V. Bocci,A. Bondar, N. Bondar,W. Bonivento, S. Borghi, A. Borgia,M. Borsato,T. J. V. Bowcock, E. Bowen, C. Bozzi,D. Brett, M. Britsch,T. Britton,J. Brodzicka,N. H. Brook, A. Bursche, J. Buytaert,S. Cadeddu,R. Calabrese, M. Calvi,M. Calvo Gomez,P. Campana,D. Campora Perez,L. Capriotti,A. Carbone,G. Carboni,R. Cardinale, A. Cardini,L. Carson, K. Carvalho Akiba, RCM Casanova Mohr,G. Casse, L. Cassina,L. Castillo Garcia, M. Cattaneo,Ch. Cauet,R. Cenci,M. Charles,Ph. Charpentier, M. Chefdeville,S. Chen,S. -F. Cheung, N. Chiapolini, M. Chrzaszcz,X. Cid Vidal, G. Ciezarek, P. E. L. Clarke, M. Clemencic, H. V. Cliff, J. Closier,V. Coco,J. Cogan,E. Cogneras,V. Cogoni,L. Cojocariu, G. Collazuol,P. Collins, A. Comerma-Montells,A. Contu,A. Cook,M. Coombes,S. Coquereau,G. Corti,M. Corvo, I. Counts, B. Couturier,G. A. Cowan,D. C. Craik,A. C. Crocombe,M. Cruz Torres,S. Cunliffe,R. Currie, C. D'Ambrosio,J. Dalseno,P. David, P. N. Y. David,A. Davis, K. De Bruyn,S. De Capua,M. De Cian,J. M. De Miranda, L. De Paula, W. De Silva, P. De Simone,C. -T. Dean, D. Decamp,M. Deckenhoff, L. Del Buono,N. Déléage, D. Derkach,O. Deschamps,F. Dettori,B. Dey,A. Di Canto, A Di Domenico,H. Dijkstra,S. Donleavy,F. Dordei,M. Dorigo,A. Dosil Suárez,D. Dossett, A. Dovbnya, K. Dreimanis,G. Dujany,F. Dupertuis, P. Durante, R. Dzhelyadin,A. Dziurda,A. Dzyuba, S. Easo,U. Egede,V. Egorychev,S. Eidelman,S. Eisenhardt, U. Eitschberger, R. Ekelhof,L. Eklund,I. El Rifai,Ch. Elsasser,S. Ely,S. Esen,H. -M. Evans,T. Evans, A. Falabella, C. Färber, C. Farinelli, N. Farley, S. Farry,R. Fay,D. Ferguson,V. Fernandez Albor,F. Ferreira Rodrigues, M. Ferro-Luzzi,S. Filippov,M. Fiore, M. Fiorini,M. Firlej,C. Fitzpatrick,T. Fiutowski,P. Fol,M. Fontana, F. Fontanelli, R. Forty,O. Francisco,M. Frank, C. Frei,M. Frosini,J. Fu,E. Furfaro,A. Gallas Torreira,D. Galli,S. Gallorini,S. Gambetta,M. Gandelman,P. Gandini,Y. Gao,J. García Pardiñas,J. Garofoli,J. Garra Tico,L. Garrido,D. Gascon, C. Gaspar,U. Gastaldi,R. Gauld, L. Gavardi, G. Gazzoni,A. Geraci,E. Gersabeck,M. Gersabeck, T. Gershon, Ph. Ghez,A. Gianelle,S. Gianì,V. Gibson, L. Giubega,V. V. Gligorov,C. Göbel,D. Golubkov,A. Golutvin, A. Gomes, C. Gotti,M. Grabalosa Gándara,R. Graciani Diaz,L. A. Granado Cardoso,E. Graugés,E. Graverini, G. Graziani,A. Grecu,E. Greening,S. Gregson,P. Griffith, L. Grillo,O. Grünberg,B. Gui,E. Gushchin,Yu. Guz, T. Gys,C. Hadjivasiliou, G. Haefeli, C. Haen,S. C. Haines, S. Hall,B. Hamilton,T. Hampson,X. Han, S. Hansmann-Menzemer, N. Harnew,S. T. Harnew, J. Harrison,J. He,T. Head,V. Heijne, K. Hennessy,P. Henrard,L. Henry,J. A. Hernando Morata,E. van Herwijnen,M. Heß, A. Hicheur,D. Hill,M. Hoballah,C. Hombach,W. Hulsbergen,N. Hussain,D. Hutchcroft,D. Hynds,M. Idzik,P. Ilten, R. Jacobsson,A. Jaeger, J. Jalocha, E. Jans, P. Jaton,A. Jawahery, F. Jing,M. John,D. Johnson,C. R. Jones, C. Joram,B. Jost,N. Jurik,S. Kandybei,W. Kanso, M. Karacson,T. M. Karbach,S. Karodia,M. Kelsey,I. R. Kenyon,T. Ketel, B. Khanji, C. Khurewathanakul,S. Klaver,K. Klimaszewski, O. Kochebina, M. Kolpin,I. Komarov,R. F. Koopman,P. Koppenburg,M. Korolev, L. Kravchuk,K. Kreplin, M. Kreps,G. Krocker,P. Krokovny,F. Kruse,W. Kucewicz, M. Kucharczyk,V. Kudryavtsev, K. Kurek, T. Kvaratskheliya,V. N. La Thi, D. Lacarrere, G. Lafferty,A. Lai,D. Lambert,R. W. Lambert,G. Lanfranchi, C. Langenbruch,B. Langhans,T. Latham,C. Lazzeroni,R. Le Gac, J. van Leerdam,J. -P. Lees,R. Lefèvre, A. Leflat, J. Lefrançois,O. Leroy,T. Lesiak, B. Leverington,Y. Li,T. Likhomanenko,M. Liles,R. Lindner,C. Linn, F. Lionetto,B. Liu, S. Lohn, I. Longstaff, J. H. Lopes, P. Lowdon,D. Lucchesi,H. Luo, A. Lupato,E. Luppi,O. Lupton, F. Machefert,I. V. Machikhiliyan, F. Maciuc, O. Maev,S. Malde, A. Malinin,G. Manca,G. Mancinelli, A. Mapelli, J. Maratas, J. F. Marchand,U. Marconi,C. Marin Benito,P. Marino, R. Märki,J. Marks, G. Martellotti, M. Martinelli,D. Martinez Santos, F. Martinez Vidal,D. Martins Tostes, A. Massafferri,R. Matev, Z. Mathe, C. Matteuzzi, A. Mazurov, M. McCann,J. McCarthy, A. McNab,R. McNulty, B. McSkelly, B. Meadows, F. Meier,M. Meissner, M. Merk,D. A. Milanes,M. -N. Minard, N. Moggi,J. Molina Rodriguez,S. Monteil,M. Morandin,P. Morawski,A. Mordà,M. J. Morello, J. Moron, A. -B. Morris, R. Mountain,F. Muheim,K. Müller, M. Mussini,B. Muster,P. Naik,T. Nakada,R. Nandakumar,I. Nasteva,M. Needham, N. Neri, S. Neubert, N. Neufeld, M. Neuner,A. D. Nguyen, T. D. Nguyen, C. Nguyen-Mau,M. Nicol,V. Niess, R. Niet, N. Nikitin, T. Nikodem, A. Novoselov,D. P. O'Hanlon, A. Oblakowska-Mucha,V. Obraztsov,S. Ogilvy,O. Okhrimenko, R. Oldeman,C. J. G. Onderwater,M. Orlandea, J. M. Otalora Goicochea,A. Otto,P. Owen,A. Oyanguren,B. K. Pal,A. Palano,F. Palombo, M. Palutan,J. Panman, A. Papanestis,M. Pappagallo, L. L. Pappalardo,C. Parkes,C. J. Parkinson, G. Passaleva,G. D. Patel,M. Patel, C. Patrignani,A. Pearce,A. Pellegrino, G. Penso,M. Pepe Altarelli,S. Perazzini, P. Perret, L. Pescatore,E. Pesen, K. Petridis,A. Petrolini,E. Picatoste Olloqui, B. Pietrzyk, T. Pilař, D. Pinci,A. Pistone,S. Playfer,M. Plo Casasus, F. Polci,A. Poluektov, I. Polyakov, E. Polycarpo,A. Popov,D. Popov,B. Popovici,C. Potterat,E. Price, J. D. Price,J. Prisciandaro,A. Pritchard, C. Prouve,V. Pugatch,A. Puig Navarro, G. Punzi, W. Qian, B. Rachwal, J. H. Rademacker,B. Rakotomiaramanana,M. Rama, M. S. Rangel,I. Raniuk,N. Rauschmayr,G. Raven,F. Redi,S. Reichert,M. M. Reid,A. C. dos Reis,S. Ricciardi,S. Richards, M. Rihl, K. Rinnert,V. Rives Molina, P. Robbe, A. B. Rodrigues,E. Rodrigues,P. Rodriguez Perez, S. Roiser,V. Romanovsky,A. Romero Vidal,M. Rotondo,J. Rouvinet,T. Ruf, H. Ruiz,P. Ruiz Valls,J. J. Saborido Silva, N. Sagidova, P. Sail, B. Saitta, V. Salustino Guimaraes, C. Sanchez Mayordomo,B. Sanmartin Sedes, R. Santacesaria,C. Santamarina Rios,E. Santovetti,A. Sarti,C. Satriano,A. Satta,D. M. Saunders, D. Savrina,M. Schiller,H. Schindler,M. Schlupp, M. Schmelling,B. Schmidt, O. Schneider, A. Schopper,M. -H. Schune, R. Schwemmer,B. Sciascia, A. Sciubba,A. Semennikov, I. Sepp,N. Serra,J. Serrano,L. Sestini,P. Seyfert, M. Shapkin,I. Shapoval,Y. Shcheglov, T. Shears, L. Shekhtman,V. Shevchenko, A. Shires,R. Silva Coutinho,G. Simi,M. Sirendi, N. Skidmore,I. Skillicorn,T. Skwarnicki, N. A. Smith,E. Smith,J. Smith,M. Smith,H. Snoek, M. D. Sokoloff,F. J. P. Soler,F. Soomro, D. Souza, B. Souza De Paula, B. Spaan, P. Spradlin,S. Sridharan, F. Stagni,M. Stahl,S. Stahl, O. Steinkamp, O. Stenyakin, F Sterpka,S. Stevenson,S. Stoica,S. Stone,B. Storaci,S. Stracka,M. Straticiuc,U. Straumann,R. Stroili,L. Sun, W. Sutcliffe,K. Swientek, S. Swientek,V. Syropoulos, M. Szczekowski, P. Szczypka,T. Szumlak, S. T'Jampens,M. Teklishyn, G. Tellarini, F. Teubert,C. Thomas, E. Thomas,J. van Tilburg,V. Tisserand,M. Tobin,J. Todd, S. Tolk,L. Tomassetti,D. Tonelli, S. Topp-Joergensen, N. Torr, E. Tournefier,S. Tourneur, M. T. Tran,M. Tresch,A. Trisovic,A. Tsaregorodtsev, P. Tsopelas, N. Tuning,M. Ubeda Garcia, A. Ukleja,A. Ustyuzhanin,U. Uwer, C. Vacca,V. Vagnoni, G. Valenti, A. Vallier,R. Vazquez Gomez,P. Vazquez Regueiro,C. Vázquez Sierra,S. Vecchi,J. J. Velthuis,M. Veltri,G. Veneziano, M. Vesterinen,JVVB Viana Barbosa,B. Viaud, D. Vieira,M. Vieites Diaz,X. Vilasis-Cardona, A. Vollhardt,D. Volyanskyy,D. Voong, A. Vorobyev,V. Vorobyev,C. Voß,J. A. de Vries, R. Waldi,C. Wallace,R. Wallace, J. Walsh,S. Wandernoth, J. Wang,D. R. Ward,N. K. Watson, D. Websdale,M. Whitehead, D. Wiedner,G. Wilkinson,M. Wilkinson,M. P. Williams, M. Williams,H. W. Wilschut,F. F. Wilson, J. Wimberley, J. Wishahi,W. Wislicki,M. Witek, G. Wormser,S. A. Wotton,S. Wright, K. Wyllie,Y. Xie,Z. Xing,Z. Xu, Z. Yang,X. Yuan, O. Yushchenko,M. Zangoli,M. Zavertyaev,L. Zhang,W. C. Zhang,Y. Zhang, A. Zhelezov,A. Zhokhov, L. Zhong
Physical Review Letters（2015）
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摘要
Two structures are observed close to the kinematic threshold in the Xi(0)(b)pi(-) mass spectrum in a sample of proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb(-1), recorded by the LEICb experiment. In the quark model, two baryonic resonances with quark content bds are expected in this mass region: the spin-parity J(P) = (1/2)(+) and J(P) = (3/2)(+) states, denoted Xi'(-)(b) and Xi*(-)(b). Interpreting the structures as these resonances, we measure the mass differences and the width of the heavier state to be m(Xi'(-)(b)) - m(Xi(0)(b)) - m(pi(-))=3.653 +/- 0.018 +/- 0.006 MeV/c(2), m(Xi*(-)(b)) - m(Xi(0)(b)) - m(pi(-)) = 23.96 +/- 0.12 +/- 0.06 MeV/e(2), Gamma(Xi*(-)(b)) = 1.65 +/- 0.31 +/- 0.10 MeV, where the first and second uncertainties are statistical and systematic, respectively. The width of the lighter state is consistent with zero, and we place an upper limit of Gamma(Xi'(-)(b)) < 0.08 MeV at 95% confidence level. Relative production rates of these states are also reported.
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