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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2008, vol. 100, p. -

Observation of a new DsJ meson in B+→D̄0D0K+ decays

Brodzicka J., Palka H., Adachi I., Aihara H., Aulchenko V., Bakich A. M., Barberio E., Bay A., Bedny I., Bitenc U., Bondar A., Bračko M., Browder T. E., Chang M. C., Chang P., Chen A., Chen W. T., Cheon B. G., Chiang C. C., Chistov R., Cho I. S., Choi S. K., Choi Y., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Gabyshev N., Go A., Gokhroo G., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou W. S., Hyun H. J., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kang J. H., Kawai H., Kawasaki T., Kichimi H., Kim H. O., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krokovny P., Kumar R., Kuo C. C., Kwon Y. J., Lange J. S., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Limosani A., Liventsev D., Mandl F., McOnie S., Medvedeva T., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Mizuk R., Mori T., Nagasaka Y., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Pakhlova G.

We report the observation of a new DsJ meson produced in B+→D̄0DsJ→D̄0D0K+. This state has a mass of M=2708±9-10+11MeV/c2, a width Γ=108±23-31+36MeV/c2 and a 1- spin-parity. The statistical significance of this observation is 8.4σ. The results are based on an analysis of 449×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2008 The American Physical Society.