Study of χb meson production in pp collisions at √s = 7 and 8 TeV and observation of the decay χb(3P)→Υ(3S)γ



    CERN-LHC. A study of χb meson production at LHCb is performed on proton-proton collision data, corresponding to 3.0 fb−1 of integrated luminosity collected at centre-of-mass energies √s =7 and 8 TeV. The fraction of Υ(nS)
    mesons originating from χb decays is measured as a function of the Υ transverse momentum in the rapidity range 2.0<yΥ<4.5. The radiative transition of the
    χb(3P) meson to Υ(3S) is observed for the first time. The χb1(3P) mass is determined to be mχb1(3P)=10511.3±1.7±2.5 MeV/c2, where the first uncertainty is statistical and the second is systematic.
    Date made available4 Jan 2014

    Cite this