Search for resonant B±→K±h→K±γγB±→K±h→K±γγ decays at Belle

We report measurements and searches for resonant B±→K±h→K±γγB±→K±h→K±γγ decays where h is a η  , η′η′, ηcηc, ηc(2S)ηc(2S), χc0χc0, χc2χc2, J/ψJ/ψ meson or the X(3872)X(3872) particle. The results are based on a data sample containing 535 million BB¯ pairs collected with the Belle detector at the KEKB e+e−e+e− asymmetric-energy collider operating at the ϒ(4S)ϒ(4S) resonance. Signals are observed in the modes with η   and η′η′, and we obtain evidence for a signal in the mode with ηcηc. We measure B(B±→K±η→K±γγ)=(0.87−0.15+0.16(stat)−0.07+0.10(syst))×10−6, B(B±→K±η′→K±γγ)=(1.40−0.15+0.16(stat)−0.12+0.15(syst))×10−6 and B(B±→K±ηc→K±γγ)=(0.22−0.07+0.09(stat)−0.02+0.04(syst))×10−6. We set upper limits on the branching fractions of the other modes.