Browse/search for people

Publication - Dr Jeremy Dalseno

    First observation of B+→ D+s K+K decays and a search for B+ → D+s φ decays

    Citation

    Adinolfi, M, Buchanan, E, Chapman, M, Cook, A, Dalseno, J, Harnew, S, Kariuki, J, Maddrell-Mander, S, Naik, P, Petridis, K, Pomery, G, Price, E, Prouve, C, Quagliani, R, Rademacker, J, Richards, S, Saunders, D, Skidmore, N, Velthuis, J & , 2018, ‘First observation of B+→ D+s K+K decays and a search for B+ → D+s φ decays’. Journal of High Energy Physics, vol 2018.

    Abstract

    A search for B+ → D s + K+K decays is performed using pp collision data corresponding to an integrated luminosity of 4.8 fb−1,
    collected at centre-of-mass energies of 7, 8 and 13 TeV with the LHCb
    experiment. A significant signal is observed for the first time and the
    branching fraction is determined to be

    B(B+→D+sK+K−)=(7.1±0.5±0.6±0.7)×10−6,

    where
    the first uncertainty is statistical, the second systematic and the
    third due to the uncertainty on the branching fraction of the
    normalisation mode B+→D+sD¯¯¯¯0

    . A search is also performed for the pure annihilation decay B+ → D s + ϕ. No significant signal is observed and a limit of

    B(B+→D+sϕ)<4.9×10−7(4.2×10−7) is set on the branching fraction at 95% (90%) confidence level.

    Full details in the University publications repository