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  • Measurement of the differen...
    Amhis, Y.; Barter, W.; Bedeschi, F.; Benson, S.; Benton, J.; Bjørnstad, P.M.; Bocci, V.; Bondar, A.; Bowcock, T.J.V.; Brett, D.; Britsch, M.; Brook, N.H.; Callot, O.; Cardinale, R.; Cardini, A.; Casse, G.; Ciba, K.; Closier, J.; Cogneras, E.; DʼAmbrosio, C.; Davis, A.; De Cian, M.; De Silva, W.; Decamp, D.; Dettori, F.; Dosil Suárez, A.; Durante, P.; Elsasser, Ch; Fave, V.; Forty, R.; Francisco, O.; Garosi, P.; Gauld, R.; Gersabeck, M.; Ghez, Ph; Gibson, V.; He, J.; Hulsbergen, W.; Huse, T.; Hussain, N.; Jacobsson, R.; Kanso, W.; Korolev, M.; Kreplin, K.; La Thi, V.N.; Lafferty, G.; Lambert, D.; Latham, T.; Leverington, B.; Machikhiliyan, I.V.; Mancinelli, G.; Marconi, U.; Marks, J.; Martín Sánchez, A.; Martinez Santos, D.; Mc Skelly, B.; McCarthy, J.; Meier, F.; Nakada, T.; Needham, M.; Nikitin, N.; Nomerotski, A.; Oldeman, R.; Oyanguren, A.; Patel, M.; Pavel-Nicorescu, C.; Penso, G.; Pilař, T.; Prisciandaro, J.; Punzi, G.; dos Reis, A.C.; Sail, P.; Santovetti, E.; Sciubba, A.; Seco, M.; Serra, N.; Serrano, J.; Shapkin, M.; Shevchenko, O.; Smith, E.; Smith, M.; Sparkes, A.; Stahl, S.; Stoica, S.; Swientek, S.; Syropoulos, V.; Tuning, N.; Ukleja, A.; Ustyuzhanin, A.; Uwer, U.; Vieira, D.; Volyanskyy, D.; Vorobyev, A.; Wiggers, L.; Wilson, F.F.; Wishahi, J.; Young, R.; Zavertyaev, M.; Zhelezov, A.; Zvyagin, A.

    Physics letters. B, 08/2013, Letnik: 725, Številka: 1-3
    Journal Article

    The differential branching fraction of the decay Λb0→Λμ+μ− is measured as a function of the square of the dimuon invariant mass, q2. A yield of 78±12Λb0→Λμ+μ− decays is observed using data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. A significant signal is found in the q2 region above the square of the J/ψ mass, while at lower-q2 values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over q2, while excluding the J/ψ and ψ(2S) regions, gives a branching fraction of B(Λb0→Λμ+μ−)=(0.96±0.16(stat)±0.13(syst)±0.21(norm))×10−6, where the uncertainties are statistical, systematic and due to the normalisation mode, Λb0→J/ψΛ, respectively.