Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2005, vol. 94, p. -

Observation of an isotriplet of excited charmed baryons decaying to Λ c + π

Mizuk R., Abe K., Aihara H., Akatsu M., Asano Y., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Ban Y., Banerjee S., Bedny I., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chao Y., Chen A., Cheon B. G., Chistov R., Choi S. K., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Dragic J., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Garmash A., Gershon T., Gokhroo G., Haba J., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Hokuue T., Hoshi Y., Hou S., Hou W. S., Hsiung Y. B., Iijima T., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Kapusta P., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim J. H., Kim S. K., Kim S. M., Koppenburg P., Korpar S., Križan P., Krokovny P., Kulasiri R., Kuo C. C., Kuzmin A., Kwon Y. J., Lee S. E., Lee S. H., Lesiak T., Li J., Lin S. W., Liventsev D., Majumder G., Mandl F., Matsumoto T., Mitaroff W., Miyake H., Miyata H., Mohapatra D., Mori T., Nagamine T., Nagasaka Y., Nakano E., Nakao M., Nishida S.

We report the observation of an isotriplet of excited charmed baryons, decaying into Λ c + π -, Λ c + π 0, and Λ c +π +. We measure the mass differences M(Λ c + π) -M(Λ c +) and widths to be 515.4 -3.1-6.0 +3.2+2.1 MeV/c 2, 61 -13-13 +18+22 MeV for the neutral state; 505.4 -4.6-2.0 +5.8+12.4 MeV/c 2, 62 -23-38 +37+52 MeV for the charged state; and 514.5 -3.1-4.9 +3.4+2.8 MeV/c 2, 75 -13-11 +18+12 MeV for the doubly charged state, where the uncertainties are statistical and systematic, respectively. These results are obtained from a 281 fb -1 data sample collected with the Belle detector near the υ(4S) resonance, at the KEKB asymmetric energy e +e - collider. © 2005 The American Physical Society Nova Gorica Polytechnic, Nova Gorica.