Journal article

Search for resonant B- /--> K( /-)h -> K- /-gamma gamma decays at Belle

J Wicht, I Adachi, H Aihara, D Anipko, V Aulchenko, T Aushev, AM Bakich, E Barberio, I Bedny, U Bitenc, I Bizjak, A Bondar, A Bozek, M Bracko, J Brodzicka, TE Browder, P Chang, Y Chao, A Chen, WT Chen Show all

PHYSICS LETTERS B | ELSEVIER SCIENCE BV | Published : 2008

Abstract

We report measurements and searches for resonant B± → K± h → K± γ γ decays where h is a η, η′, ηc, ηc (2 S), χc 0, χc 2, J / ψ meson or the X (3872) particle. The results are based on a data sample containing 535 million B over(B, ̄) pairs collected with the Belle detector at the KEKB e+ e- asymmetric-energy collider operating at the Υ{hooked} (4 S) resonance. Signals are observed in the modes with η and η′, and we obtain evidence for a signal in the mode with ηc. We measure B (B± → K± η → K± γ γ) = (0.87-0.15+0.16 (stat)-0.07+0.10 (syst)) × 10-6, B (B± → K± η′ → K± γ γ) = (1.40-0.15+0.16 (stat)-0.12+0.15 (syst)) × 10-6 and B (B± → K± ηc → K± γ γ) = (0.22-0.07+0.09 (stat)-0.02+0.04 (syst)) ×..

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