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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2008, vol. 662, p. 323-329

Search for resonant B± → K± h → K± γ γ decays at Belle

Wicht J., Adachi I., Aihara H., Anipko D., Aulchenko V., Aushev T., Bakich A. M., Barberio E., Bedny I., Bitenc U., Bizjak I., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Cho I. S., Choi Y., Choi Y. K., Dalseno J., Dash M., Eidelman S., Epifanov D., Fratina S., Go A., Gorišek A., Ha H., Hara T., Hayasaka K., Hazumi M., Heffernan D., Hinz L., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Ikado K., Inami K., Ishikawa A., Ishino H., Iwasaki M., Iwasaki Y., Jacoby C., Kah D. H., Kaji H., Kang J. H., Kapusta P., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Križan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. J., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Li J., Limosani A., Lin S. W., Liventsev D., Majumder G., Mandl F., Matsumoto T., Matyja A., McOnie S., Medvedeva T., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Moloney G. R., Nakano E., Nakao M., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Onuki Y., Pakhlov P.

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)) × 10-6. We set upper limits on the branching fractions of the other modes. © 2008 Elsevier B.V. All rights reserved.