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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2004, vol. 93, p. 051803-1

Observation of B + → ψ(3770)K +

Chistov R., Abe K., Abe K., Abe T., Aihara H., Akatsu M., Asano Y., Aushev T., Bakich A. M., Ban Y., Banerjee S., Bay A., Bedny I., Bizjak L., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chao Y., Chen K. F., Cheon B. G., Choi Y., Choi Y. K., Danilov M., Dash M., Dong L. Y., Drutskoy A., Eidelman S., Eiges V., Epifanov D., Gabyshev N., Garmash A., Gershon T., Golob B., Guo R., Haba J., Hara T., Hayashii H., Hazumi M., Hinz L., Hokuue T., Hoshi Y., Hou W. S., Huang H. C., Iijima T., Inami K., Ishikawa A., Iwasaki H., Iwasaki M., Kagan R., Kang J. H., Kang J. S., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim S. K., Kinoshita K., Koppenburg P., Korpar S., Križan P., Krokovny P., Kumar S., Kuzmin A., Kwon Y. J., Lange J. S., Lesiak T., Li J., Limosani A., Lin S. W., Liventsev D., MacNaughton J., Majumder G., Mandl F., Marlow D., Matsumoto H., Matsumoto T., Matyja A., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Mohapatra D., Moloney G. R., Nagamine T., Nagasaka Y., Nakadaira T., Nakano E., Nakao M., Nishida S., Nitoh O., Noguchi S., Ogawa S.

The observation of the decay B +→ψ(3770)K +, where the ψ(3770) was constructed in the D 0D̄ 0 and D +D - decay channels, was reported. The branching fraction for the decay was measured and a 90% confidence level upper limit was set for the decay. Data was collected at the Y(4S) resonance by the Belle detector at the KEKB asymmetric-energy e +e - collider. Candidate π 0 mesons were identified as pairs of non-charged-track-associated electromagnetic calorimeter clusters.