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  • Evidence for the decay X(38...
    Ajaltouni, Z.; An, L.; Andreotti, M.; Artamonov, A.; Benson, S.; van Beuzekom, M.; Blouw, J.; Britsch, M.; Britton, T.; Callot, O.; Cheung, S.-F.; Chrzaszcz, M.; Ciezarek, G.; Closier, J.; Comerma-Montells, A.; Corvo, M.; Currie, R.; D'Ambrosio, C.; Dettori, F.; Dorigo, M.; Egede, U.; Farry, S.; Ferguson, D.; Fontanelli, F.; Frank, M.; Gao, Y.; Gavardi, L.; Golutvin, A.; Grabalosa Gándara, M.; Grillo, L.; Grünberg, O.; Hadjivasiliou, C.; Haines, S.C.; Harnew, N.; Harnew, S.T.; Head, T.; Henry, L.; Hussain, N.; Hutchcroft, D.; Hynds, D.; Jacobsson, R.; Kandybei, S.; Kenyon, I.R.; Klaver, S.; Komarov, I.; Kozlinskiy, A.; Kucharczyk, M.; Kurek, K.; Lazzeroni, C.; Leroy, O.; Longstaff, I.; Malde, S.; Marchand, J.F.; Martens, A.; Martinez Vidal, F.; McNulty, R.; McSkelly, B.; Merk, M.; Milanes, D.A.; Mordà, A.; Okhrimenko, O.; Orlandea, M.; Palombo, F.; Pazos Alvarez, A.; Pistone, A.; Popov, D.; Potterat, C.; Rademacker, J.H.; Raven, G.; Reid, M.M.; Ricciardi, S.; Ruiz, H.; Sanmartin Sedes, B.; Satta, A.; Savrie, M.; Schlupp, M.; Schopper, A.; Sepp, I.; Shevchenko, V.; Shires, A.; Simi, G.; Smith, E.; Sokoloff, M.D.; Swientek, S.; T'Jampens, S.; Teklishyn, M.; Thomas, E.; Tisserand, V.; Tsopelas, P.; Vagnoni, V.; Vazquez Gomez, R.; Velthuis, J.J.; Vieira, D.; Wallace, C.; Wicht, J.; Wimberley, J.; Wishahi, J.; Wotton, S.A.; Xu, Z.; Zhong, L.

    Nuclear physics. B, 09/2014, Letnik: 886, Številka: C
    Journal Article

    Evidence for the decay mode X(3872)→ψ(2S)γ in B+→X(3872)K+ decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton–proton collisions, corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872)→ψ(2S)γ decay to that of the X(3872)→J/ψγ decay is measured to beB(X(3872)→ψ(2S)γ)B(X(3872)→J/ψγ)=2.46±0.64±0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure DD¯⁎ molecular interpretation of the X(3872) state.