First Observation of the Doubly Cabibbo-Suppressed Decay of a Charmed Baryon: Λ c+ → pK+π-

We report the first observation of the decay Λ+c→pK+π- using a 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. This is the first observation of a doubly Cabibbo-suppressed decay of a charmed baryon. We measure the branching ratio of this decay with r...

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Veröffentlicht in:	Physical review letters 2016-06, Vol.117 (1)
Hauptverfasser:	Kim, B. H., Aihara, H., Asner, D. M., Aushev, T., Babu, V., Bhuyan, B., Browder, T. E., Červenkov, D., Choi, Y., Cinabro, D., Dalseno, J., Dash, N., Doležal, Z., Drásal, Z., Dutta, D., Fulsom, B. G., Gabyshev, N., Garmash, A., Gaur, V., Grygier, J., Haba, J., Hara, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Jacobs, W. W., Jaegle, I., Joo, K. K., Kato, E., Katrenko, P., Kiesling, C., Kim, J. B., Kim, K. T., Kim, M. J., Kodyš, P., Križan, P., Krokovny, P., Kuhr, T., Kuzmin, A., Kwon, Y. -J., Lee, I. S., Li, Y., Libby, J., Matvienko, D., Mohanty, G. B., Moll, A., Moon, H. K., Mussa, R., Nakano, E., Nakao, M., Nath, K. J., Nayak, M., Niiyama, M., Ogawa, S., Olsen, S. L., Pakhlova, G., Pal, B., Park, H., Pedlar, T. K., Pestotnik, R., Petrič, M., Piilonen, L. E., Ryu, S., Sato, Y., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Senyo, K., Sevior, M. E., Shebalin, V., Shibata, T. -A., Shiu, J. -G., Simon, F., Stanič, S., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Uchida, M., Unno, Y., Usov, Y., Vanhoefer, P., Varvell, K. E., Vinokurova, A., Vossen, A., Wang, C. H., Wang, M. -Z., Wang, X. L., Watanabe, Y., Won, E., Yamaoka, J., Yashchenko, S., Ye, H., Yelton, J., Yusa, Y., Zhang, Z. P., Zhilich, V., Zupanc, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Bell II Belle Collaboration Environmental Molecular Sciences Laboratory NUCLEAR PHYSICS AND RADIATION PHYSICS
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Zusammenfassung:	We report the first observation of the decay Λ+c→pK+π- using a 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. This is the first observation of a doubly Cabibbo-suppressed decay of a charmed baryon. We measure the branching ratio of this decay with respect to its Cabibbo-favored counterpart to be B(Λ+c→pK+π-)/B(Λ+c→pK-π+)=(2.35±0.27±0.21)×10-3, where the uncertainties are statistical and systematic, respectively.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.117.011801