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  • Search for excited Bc+ states
    Alfonso Albero, A.; Alkhazov, G.; Alves, A. A.; Appleby, R. B.; Aslanides, E.; Babuschkin, I.; Badalov, A.; Baker, S.; Barlow, R. J.; Barter, W.; Baryshnikov, F.; Bediaga, I.; Beliy, N.; Bencivenni, G.; Bezshyiko, Ia; Birnkraut, A.; Blanc, F.; Bowcock, T. J. V.; Bozzi, C.; Cattaneo, M.; Cenci, R.; Cheung, S. F.; Ciambrone, P.; Cliff, H. V.; Contu, A.; Costa Sobral, C. M.; D’Ambrosio, C.; De Bruyn, K.; Dosil Suárez, A.; Ebert, M.; Eisenhardt, S.; Evans, H. M.; Farry, S.; Fazzini, D.; Fernandez Prieto, A.; Fontanelli, F.; Färber, C.; Gallorini, S.; Gao, Y.; Garrido, L.; Girard, O. G.; Gotti, C.; Guz, Yu; Hansmann-Menzemer, S.; Hulsbergen, W.; Jones, C. R.; Jurik, N.; Ketel, T.; Le Gac, R.; Leflat, A.; Leroy, O.; Li, Z.; Likhomanenko, T.; Loh, D.; Lucchesi, D.; Lupato, A.; Mancinelli, G.; Matteuzzi, C.; Maurin, B.; McNab, A.; Millard, E.; Monteil, S.; Morandin, M.; Muheim, F.; Obraztsov, V.; Otalora Goicochea, J. M.; Pais, P. R.; Parkes, C.; Patel, M.; Perret, P.; Petridis, K.; Petruzzo, M.; Pietrzyk, B.; Pistone, A.; Poluektov, A.; Pomery, G. J.; Rangel, M. S.; Rollings, A.; Romero Vidal, A.; Ruiz Vidal, J.; Sadykhov, E.; Schmidt, B.; Shears, T.; Smith, I. T.; Spradlin, P.; Stefkova, S.; Sun, J.; Tellarini, G.; van Tilburg, J.; Tsaregorodtsev, A.; Valassi, A.; van Veghel, M.; Velthuis, J. J.; Vieira, D.; Wang, J.; Weiden, A.; Wilson, F. F.; Winn, M.; Wotton, S. A.; Zhang, L.

    The journal of high energy physics, 29/1, Letnik: 2018, Številka: 1
    Journal Article

    A bstract A search is performed in the invariant mass spectrum of the B c + π + π − system for the excited B c + states B c (2 1 S 0 ) + and B c (2 3 S 1 ) + using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s = 8 TeV, corresponding to an integrated luminosity of 2 fb −1 . No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the B c (2 1 S 0 ) + and B c (2 3 S 1 ) + states times the branching fractions of B c (2 1 S 0 ) +  →  B c + π + π − and B c (2 3 S 1 ) +  →  B c * + π + π − over the production cross-section of the B c + state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for B c (2 1 S 0 ) + and B c (2 3 S 1 ) + in the mass ranges 6830 , 6890 MeV /c 2 and 6795 , 6890 MeV /c 2 , respectively.