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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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

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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., ... Zürcher, D. (2005). Observation of an isotriplet of excited charmed baryons decaying to Λ c + π. Physical review letters, 94(12), [122002]. https://doi.org/10.1103/PhysRevLett.94.122002