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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2009, vol. 672, p. 1-5

Study of Ωc 0 and Ωc * 0 baryons at Belle

Solovieva E., Chistov R., Adachi I., Aihara H., Arinstein K., Aushev T., Bakich A. M., Balagura V., Bitenc U., Bondar A., Bračko M., Brodzicka J., Browder T. E., Chang P., Chen A., Cheon B. G., Cho I. S., Choi S. K., Choi Y., Dalseno J., Danilov M., Dash M., Eidelman S., Ha H., 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., Kah D. H., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim H. O., Kim Y. I., Kim Y. J., Kinoshita K., Korpar S., Križan P., Krokovny P., Kumar R., Kuzmin A., Kwon Y. J., Kyeong S. H., Lange J. S., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Liu C., Liventsev D., Matyja A., McOnie S., Miyabayashi K., Miyata H., Miyazaki Y., Mizuk R., Nagasaka Y., Nakao M., Nishida S., Nitoh O., Noguchi S., Ogawa S., Ohshima T., Okuno S., Pakhlov P., Pakhlova G., Palka H., Park H. K., Peak L. S., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Schwanda C., Senyo K., Sevior M. E., Shapkin M., Shiu J. G., Stanič S., Starič M., Sumiyoshi T., Tanaka M.

We report results from a study of the charmed double strange baryons Ωc 0 and Ωc * 0 at Belle. The Ωc 0 is reconstructed using the Ωc 0 → Ω- π+ decay mode, and its mass is measured to be (2693.6 ± 0.3-1.5 +1.8)   MeV / c2. The Ωc * 0 baryon is reconstructed in the Ωc 0 γ mode. The mass difference MΩc* 0 - MΩc0 is measured to be (70.7 ± 0.9-0.9 +0.1)   MeV / c2. The analysis is performed using 673 fb-1 of data on and near the Υ{hooked} (4 S) collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. © 2008 Elsevier B.V. All rights reserved.