Search for the X(5568) State Decaying into B-s(0)pi(+/-) in Proton-Proton Collisions at root s=8 TeV

A. M. Sirunyan, A. Tumasyan,W. Adam,F. Ambrogi, E. Asilar, T. Bergauer,J. Brandstetter, E. Brondolin, M. Dragicevic,J. Eroe,A. Escalante Del Valle, M. Flech, M. Fried, R. Fruehwirth, V. M. Ghete,J. Grossmann, J. Hrubec, M. Jeitler,A. Koenig, N. Krammer, I Kraetschmer, D. Liko,T. Madlener, I Mikulec, E. Pree,N. Rad, H. Rohringer, J. Schieck, R. Schoefbeck,M. Spanring,D. Spitzbart,W. Waltenberger, J. Witttnann, C. E. Wulz, M. Zarucki, Chekhovsky, Mossolov,J. Suarez Gonzalez,E. A. De Wolf, D. Di Croce, X. Janssen, J. Lauwers,H. Van Haevermaet,P. Van Mechelen,N. Van Remortel,S. Abu Zeid, F. Blekman, J. D'Hondt,I De Bruyn,J. De Clercq, K. Deroover, G. Flouris, D. Lontkovskyi, S. Lowette, I Marchesini,S. Moortgat, L. Moreels, Q. Python, K. Skovpen, S. Tavemier,W. Van Doninck,P. Van Mulders,I Van Parijs, D. Beghin, B. Bilin, H. Brun, B. Clerbaux,G. De Lentdecker, H. Delannoy, B. Dorney, G. Fasanella, L. Favart,R. Goldouzian, A. Grebenyuk, A. K. Kalsi,T. Lenzi, J. Luetic, T. Maerschalk, A. Marinov, T. Seva,E. Starling,C. Vander Velde, P. Vanlaer, D. Vannerom,R. Yonamine,F. Zenoni,T. Cornelis, D. Dobur, A. Fagot, M. Gu,I Khvastunov, D. Poyraz,C. Roskas,S. Salva, M. Tytgat,W. Verbeke, N. Zaganidis, H. Bakhshiansohi, O. Bondu,S. Brochet,G. Bruno,C. Caputo,A. Caudron,P. David,S. De Visscher, C. Delaere, M. Delcourt,B. Francois, A. Giammanco,M. Komm,G. Krintiras, Lemaitre, A. Magitteri,A. Mertens, M. Musich,K. Piotrzkowski,L. Quertenmont, A. Saggio,M. Vidal Marono,S. Wertz, J. Zobec,W. L. Alda Junior, F. L. Alves,G. A. Alves,L. Brito,M. Correa Martins Junior, C. Hensel, A. Moraes,M. E. Pol,P. Rebello Teles,E. Belchior Batista Das Chagas,W. Carvalho, J. Chinellato, E. Coelho, E. M. Da Costa,G. G. Da Silveira,D. De Jesus Damiao,S. Fonseca De Souza,L. M. Huertas Guativa, H. Malbouisson,M. Melo De Almeida, C. Mom Herrera, L. Mundim, H. Nogima, L. J. Sanchez Rosas, A. Santoro,A. Sznajder, M. Thie,E. J. Tonelli Manganote,F. Torres Da Silva De Araujo,A. Vilela Pereira,S. Ahuja,C. 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Beernaert, O. Behnke,U. Behrens, A. Bermudez Martinez,A. A. Bin Anuar, K. Borras, Botta,A. Campbell,P. Connor, C. Contreras-Campana, F. Costanza,C. Diez Pardos, G. Eckerlin,D. Eckstein, T. Eichhorn,E. Eren,E. Gallo,J. Garay Garcia, A. Geiser,J. M. Grados Luyando, A. Grohsjean, P. Gunnellini, M. Guthoff,A. Harb, J. Hauk, M. Hempel,H. Jung, M. Kasemann, J. Keaveney, C. Kleinwort,I Korol,D. Kruecker,W. Lange,A. Lelek,T. Lenz,J. Leonard, K. Lipka, W. Lohmann, R. Mankel,I-A Melzer-Pellmann,A. B. Meyer, G. Mittag, J. Mnich, A. Mussgiller,E. Ntomari, D. Pitzl, A. Raspereza, M. Savitskyi,P. Saxena,R. Shevchenko,N. Stefaniuk,G. P. Van Onsem,R. Walsh, Y. Wen, K. Wichmann, C. Wissing, O. Zenaiev,R. Aggleton, S. Bein, Blobel,M. Centis Vignali, T. Dreyer, E. Garutti,D. Gonzalez,J. Haller, A. Hinzmann,M. Hoffmann, A. Karavdina, R. Klanner, R. Kogler, N. Kovalchuk, S. Kurz,T. Lapsien, D. Marconi,M. Meyer, M. Niedziela, D. Nowatschin, F. Pantaleo, T. Peiffer, A. Perieanu,C. Scharf, P. Schleper,A. Schmidt,S. Schumann, J. Schwandt, J. Sonneveld, H. Stadie, G. Steinbrueck,F. M. Stober, M. Stoever, H. Tholen, D. Troendle, E. Usai, A. Vanhoefer, B. Vormwald, M. Akbiyik, C. Barth,M. Baselga

user-5dd52aee530c701191bf1b99（2018）

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摘要

A search for resonancelike structures in the Bs0π± invariant mass spectrum is performed using proton-proton collision data collected by the CMS experiment at the LHC at s=8 TeV, corresponding to an integrated luminosity of 19.7 fb-1. The Bs0 mesons are reconstructed in the decay chain Bs0→J/ψϕ, with J/ψ→μ+μ- and ϕ→K+K-. The Bs0π± invariant mass distribution shows no statistically significant peaks for different selection requirements on the reconstructed Bs0 and π± candidates. Upper limits are set on the relative production rates of the X(5568) and Bs0 states times the branching fraction of the decay X(5568)±→Bs0π±. In addition, upper limits are obtained as a function of the mass and the natural width of possible exotic states decaying into Bs0π±.

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关键词

Branching fraction,Invariant mass,Meson,Proton,Decay chain,Luminosity,Large Hadron Collider,Nuclear physics,Function (mathematics),Physics

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