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Observation of Ψ (4415) → DD* 2 (2460) decay using initial-state radiation

Pakhlova G., Adachi I., Aihara H., Arinstein K., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Barberio E., Bedny I., Belous K., Bitenc U., Bondar A., Bracko M., Brodzicka J., Browder T. E., Chen A., Chen W. T., Cheon B. G., Chiang C. C., Chistov R., Cho I. S., Choi Y., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Gabyshev N., Golob B., Ha H., Haba J., Hayasaka K., Hazumi M., Heffernan D., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kang J. H., Kawasaki T., Kibayashi A., Kichimi H., Kim H. J., Kim H. O., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. J., Lange J. S., Lee M. J., Lee S. E., Lesiak T., Lin S. W., Liventsev D., Mandl F., Marlow D., McOnie S., Medvedeva T., Miyake H., Mizuk R., Mohapatra D., Moloney G. R., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Park H., Park K. S., Peak L. S., Pestotnik R., Piilonen L. E.

We report measurements of the exclusive cross section for e +e- → D0D-*+ over the centerof- mass energy range 4.0, GeV to 5.0GeV with initial-state radiation and the first observation of the decay (4415) → D0D-*+. From a study of the resonant substructure inΨ (4415) decay we conclude that the (4415) → D0D-π+ decay is dominated by (4415) → DD- * (2460). We obtain B( (4415) → D0D-*+ non-resonant)/B( (4415) → DD-* 2(2460) → D0D-π+) < 0.22 at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 fb-1.