@article{3073037,
    title = "Observation of a peaking structure in the J/ψφ mass spectrum from B±→J/ψφK± decays",
    author = "Chatrchyan, S. and Khachatryan, V. and Sirunyan, A.M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Erö, J. and Fabjan, C. and Friedl, M. and Frühwirth, R. and Ghete, V.M. and Hörmann, N. and Hrubec, J. and Jeitler, M. and Kiesenhofer, W. and Knünz, V. and Krammer, M. and Krätschmer, I. and Liko, D. and Mikulec, I. and Rabady, D. and Rahbaran, B. and Rohringer, C. and Rohringer, H. and Schöfbeck, R. and Strauss, J. and Taurok, A. and Treberer-Treberspurg, W. and Waltenberger, W. and Wulz, C.-E. and Mossolov, V. and Shumeiko, N. and Suarez Gonzalez, J. and Alderweireldt, S. and Bansal, M. and Bansal, S. and Cornelis, T. and De Wolf, E.A. and Janssen, X. and Knutsson, A. and Luyckx, S. and Mucibello, L. and Ochesanu, S. and Roland, B. and Rougny, R. and Staykova, Z. and Van Haevermaet, H. and Van Mechelen, P. and Van Remortel, N. and Van Spilbeeck, A. and Blekman, F. and Blyweert, S. and D'Hondt, J. and Kalogeropoulos, A. and Keaveney, J. and Maes, M. and Olbrechts, A. and Tavernier, S. and Van Doninck, W. and Van Mulders, P. and Van Onsem, G.P. and Villella, I. and Clerbaux, B. and De Lentdecker, G. and Favart, L. and Gay, A.P.R. and Hreus, T. and Léonard, A. and Marage, P.E. and Mohammadi, A. and Perniè, L. and Reis, T. and Seva, T. and Thomas, L. and Vander Velde, C. and Vanlaer, P. and Wang, J. and Adler, V. and Beernaert, K. and Benucci, L. and Cimmino, A. and Costantini, S. and Dildick, S. and Garcia, G. and Klein, B. and Lellouch, J. and Marinov, A. and Mccartin, J. and Ocampo Rios, A.A. and Ryckbosch, D. and Sigamani, M. and Strobbe, N. and Thyssen, F. and Tytgat, M. and Walsh, S. and Yazgan, E. and Zaganidis, N. and Basegmez, S. and Beluffi, C. and Bruno, G. and Castello, R. and Caudron, A. and Ceard, L. and Delaere, C. and du Pree, T. and Favart, D. and Forthomme, L. and Giammanco, A. and Hollar, J. and Jez, P. and Lemaitre, V. and Liao, J. and Militaru, O. and Nuttens, C. and Pagano, D. and Pin, A. and Piotrzkowski, K. and Popov, A. and Selvaggi, M. and Vizan Garcia, J.M. and Beliy, N. and Caebergs, T. and Daubie, E. and Hammad, G.H. and Alves, G.A. and Correa Martins Junior, M. and Martins, T. and Pol, M.E. and Souza, M.H.G. and Aldá Júnior, W.L. and Carvalho, W. and Chinellato, J. and Custódio, A. and Da Costa, E.M. and De Jesus Damiao, D. and De Oliveira Martins, C. and Fonseca De Souza, S. and Malbouisson, H. and Malek, M. and Matos Figueiredo, D. and Mundim, L. and Nogima, H. and Prado Da Silva, W.L. and Santoro, A. and Sznajder, A. and Tonelli Manganote, E.J. and Vilela Pereira, A. and Bernardes, C.A. and Dias, F.A. and Fernandez Perez Tomei, T.R. and Gregores, E.M. and Lagana, C. and Marinho, F. and Mercadante, P.G. and Novaes, S.F. and Padula, S.S. and Genchev, V. and Iaydjiev, P. and Piperov, S. and Rodozov, M. and Sultanov, G. and Vutova, M. and Dimitrov, A. and Hadjiiska, R. and Kozhuharov, V. and Litov, L. and Pavlov, B. and Petkov, P. and Bian, J.G. and Chen, G.M. and Chen, H.S. and Jiang, C.H. and Liang, D. and Liang, S. and Meng, X. and Tao, J. and Wang, J. and Wang, X. and Wang, Z. and Xiao, H. and Xu, M. and Asawatangtrakuldee, C. and Ban, Y. and Guo, Y. and Li, W. and Liu, S. and Mao, Y. and Qian, S.J. and Teng, H. and Wang, D. and Zhang, L. and Zou, W. and Avila, C. and Carrillo Montoya, C.A. and Chaparro Sierra, L.F. and Gomez, J.P. and Gomez Moreno, B. and Sanabria, J.C. and Godinovic, N. and Lelas, D. and Plestina, R. and Polic, D. and Puljak, I. and Antunovic, Z. and Kovac, M. and Brigljevic, V. and Duric, S. and Kadija, K. and Luetic, J. and Mekterovic, D. and Morovic, S. and Tikvica, L. and Attikis, A. and Mavromanolakis, G. and Mousa, J. and Nicolaou, C. and Ptochos, F. and Razis, P.A. and Finger, M. and Abdelalim, A.A. and Assran, Y. and Elgammal, S. and Ellithi Kamel, A. and Mahmoud, M.A. and Radi, A. and Kadastik, M. and Müntel, M. and Murumaa, M. and Raidal, M. and Rebane, L. and Tiko, A. and Eerola, P. and Fedi, G. and Voutilainen, M. and 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Borrello, L. and Carlsmith, D. and Cepeda, M. and Dasu, S. and Friis, E. and Grogg, K.S. and Grothe, M. and Hall-Wilton, R. and Herndon, M. and Hervé, A. and Kaadze, K. and Klabbers, P. and Klukas, J. and Lanaro, A. and Lazaridis, C. and Loveless, R. and Mohapatra, A. and Mozer, M.U. and Ojalvo, I. and Pierro, G.A. and Ross, I. and Savin, A. and Smith, W.H. and Swanson, J.",
    journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
    year = "2014",
    volume = "734",
    pages = "261-281",
    publisher = "Elsevier B.V.",
    doi = "10.1016/j.physletb.2014.05.055",
    abstract = "A peaking structure in the J/ψφ mass spectrum near threshold is observed in B ±→J/ψφK± decays, produced in pp collisions at √s=7 TeV collected with the CMS detector at the LHC. The data sample, selected on the basis of the dimuon decay mode of the J/ψ, corresponds to an integrated luminosity of 5.2 fb-1. Fitting the structure to an S-wave relativistic Breit-Wigner lineshape above a three-body phase-space nonresonant component gives a signal statistical significance exceeding five standard deviations. The fitted mass and width values are m = 4148.0 ± 2.4 (stat.) ± 6.3 (syst.)MeV and Γ=28-11+15(stat.)±19(syst.)MeV, respectively. Evidence for an additional peaking structure at higher J/ψφ mass is also reported. © 2014 The Authors."
}