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

R. Mizuk, K. Abe, H. Aihara, M. Akatsu, Y. Asano, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, Y. Ban, S. Banerjee, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. BrowderY. Chao, A. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, J. Haba, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, S. M. Kim, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, S. E. Lee, S. H. Lee, T. Lesiak, J. Li, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, H. Miyake, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, R. Pestotnik, L. E. Piilonen, H. Sagawa, Y. Sakai, T. Schietinger, O. Schneider, P. Schönmeier, J. Schümann, S. Semenov, K. Senyo, R. Seuster, H. Shibuya, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, S. Uehara, T. Uglov, K. Ueno, S. Uno, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. Z. Wang, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yang, J. Ying, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Žontar, D. Zürcher

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96 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number122002
JournalPhysical review letters
Volume94
Issue number12
DOIs
Publication statusPublished - 2005 Apr 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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