Measurement of masses and branching ratios of Ξc+ and Ξc0 baryons

T. Lesiak, K. Abe, K. Abe, I. Adachi, H. Aihara, Y. Asano, S. Bahinipati, A. M. Bakich, A. Bay, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, R. ChistovS. K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, V. Eiges, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, J. Haba, K. Hayasaka, M. Hazumi, L. Hinz, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, K. Kinoshita, S. Korpar, P. Krokovny, S. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyata, G. R. Moloney, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Park, K. S. Park, N. Parslow, L. S. Peak, L. E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, S. Semenov, H. Shibuya, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, J. Ying, Y. Yusa, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Žontar

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Abstract

We report a measurement of the Ξc+ and Ξc0 baryon masses, and the branching ratios for various Ξc decays, using 140 fb-1 of data collected by the Belle experiment at the KEKB e+e- collider. The mass splitting mΞc0 - mΞc+ is found to be 2.9 ± 0.5 MeV/c2; this measurement is three times as precise as the current world average. We measure the branching ratios Γ(Ξc + → ΛK-π+π+)/ Γ(Ξc+ → Ξ -π+π+) = 0.32 ± 0.03 ± 0.02 and Γ(Ξc0 → pK-k -π+)/Γ(Ξc0 → Ξ-π+) = 0.33 ± 0.03 ± 0.03, with improved precision, and measure Γ(Ξc+ → p KS0KS0) /Γ(Ξc+ → Ξ -π+π+) = 0.087 ± 0.016 ± 0.014, Γ(Ξc0 ΛK -π+)/Γ(Ξc0 → Ξ-π+) = 1.07 ± 0.12 ± 0.07 and Γ(Ξc0 → ΛKS 0)/Γ(Ξc0 → Ξ -π+) = 0.21 ± 0.02 ± 0.02 for the first time.

Original languageEnglish
Pages (from-to)237-246
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume605
Issue number3-4
DOIs
Publication statusPublished - Jan 13 2005

Keywords

  • Charmed baryon
  • W-exchange

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Lesiak, T., Abe, K., Abe, K., Adachi, I., Aihara, H., Asano, Y., Bahinipati, S., Bakich, A. M., Bay, A., Bitenc, U., Bizjak, I., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., Browder, T. E., Chao, Y., Chen, A., Cheon, B. G., ... Žontar, D. (2005). Measurement of masses and branching ratios of Ξc+ and Ξc0 baryons. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 605(3-4), 237-246. https://doi.org/10.1016/j.physletb.2004.11.038