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arXiv · 1312.1026

Search for doubly charmed baryons and study of charmed strange baryons at Belle

Y. Kato·T. Iijima·I. Adachi·H. Aihara·D. M. Asner·T. Aushev·A. M. Bakich·A. Bala·Y. Ban·V. Bhardwaj·B. Bhuyan·A. Bobrov·G. Bonvicini·A. Bozek·M. Bračko·T. E. Browder·D. Červenkov·V. Chekelian·A. Chen·B. G. Cheon·K. Chilikin·R. Chistov·K. Cho·V. Chobanova·Y. Choi·D. Cinabro·J. Dalseno·M. Danilov·Z. Doležal·Z. Drásal·A. Drutskoy·D. Dutta·K. Dutta·S. Eidelman·H. Farhat·J. E. Fast·T. Ferber·V. Gaur·N. Gabyshev·S. Ganguly·A. Garmash·R. Gillard·Y. M. Goh·B. Golob·J. Haba·K. Hayasaka·H. Hayashii·X. H. He·Y. Horii·Y. Hoshi·W. -S. Hou·Y. B. Hsiung·K. Inami·A. Ishikawa·Y. Iwasaki·T. Iwashita·I. Jaegle·T. Julius·J. H. Kang·E. Kato·T. Kawasaki·C. Kiesling·D. Y. Kim·H. J. Kim·J. B. Kim·J. H. Kim·M. J. Kim·Y. J. Kim·J. Klucar·B. R. Ko·P. Kodyš·S. Korpar·P. Krokovny·T. Kuhr·A. Kuzmin·Y. -J. Kwon·S. -H. Lee·J. Li·Y. Li·L. Li Gioi·J. Libby·Y. Liu·D. Liventsev·D. Matvienko·K. Miyabayashi·H. Miyata·R. Mizuk·A. Moll·N. Muramatsu·R. Mussa·Y. Nagasaka·E. Nakano·M. Nakao·M. Nayak·E. Nedelkovska·C. Ng·M. Niiyama·N. K. Nisar·S. Nishida·O. Nitoh
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Abstract

We report results of a study of doubly charmed baryons and charmed strange baryons. The analysis is performed using a 980 fb^-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We search for doubly charmed baryons Xi_cc^+(+) with the Lambda_c^+K^-pi^+(pi^+) and Xi_c^0pi^+(pi^+) final states. No significant signal is observed. We also search for two excited charmed strange baryons, Xi_c(3055)^+ and Xi_c(3123)^+ with the Sigma_c^++(2455)K^- and Sigma_c^++(2520)K^- final states. The Xi_c(3055)^+ signal is observed with a significance of 6.6 standard deviations including systematic uncertainty, while no signature of the Xi_c(3123)^+ is seen. We also study properties of the Xi_c(2645)^+ and measure a width of 2.6 +- 0.2 (stat) +- 0.4 (syst) MeV/c^2, which is the first significant determination.

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Y. Kato, T. Iijima, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, Y. Ban, V. Bhardwaj, B. Bhuyan, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, K. Inami, A. Ishikawa, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, J. Li, Y. Li, L. Li Gioi, J. Libby, Y. Liu, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, N. Muramatsu, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, M. Nayak, E. Nedelkovska, C. Ng, M. Niiyama, N. K. Nisar, S. Nishida, O. Nitoh. 2013-12-04. Search for doubly charmed baryons and study of charmed strange baryons at Belle. https://doi.org/10.1103/physrevd.89.052003

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