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First Observation of the Doubly Cabibbo-Suppressed Decay of a Charmed Baryon: Lambda(+)(c) -> pK(+)pi(-)

Authors
Yang, S. B.Tanida, K.Kim, B. H.Adachi, I.Aihara, H.Asner, D. M.Aulchenko, V.Aushev, T.Babu, V.Badhrees, I.Bakich, A. M.Barberio, E.Bhardwaj, V.Bhuyan, B.Biswal, J.Bonvicini, G.Bozek, A.Bracko, M.Browder, T. E.Cervenkov, D.Chekelian, V.Chen, A.Cheon, B. G.Chilikin, K.Chistov, R.Cho, K.Chobanova, V.Choi, Y.Cinabro, D.Dalseno, J.Danilov, M.Dash, N.Dolezal, Z.Drasal, Z.Dutta, D.Eidelman, S.Farhat, H.Fast, J. E.Ferber, T.Fulsom, B. G.Gabyshev, N.Garmash, A.Gaur, V.Gillard, R.Goh, Y. M.Goldenzweig, P.Greenwald, D.Grygier, J.Haba, J.Hamer, P.Hara, T.Hayasaka, K.Hayashii, H.Hou, W. -S.Iijima, T.Inami, K.Inguglia, G.Ishikawa, A.Itoh, R.Iwasaki, Y.Jacobs, W. W.Jaegle, I.Jeon, H. B.Joo, K. K.Julius, T.Kang, K. H.Kato, E.Katrenko, P.Kiesling, C.Kim, D. Y.Kim, H. J.Kim, J. B.Kim, K. T.Kim, M. J.Kim, S. H.Kim, S. K.Kim, Y. J.Kinoshita, K.Kobayashi, N.Kodys, P.Korpar, S.Krizan, P.Krokovny, P.Kuhr, T.Kuzmin, A.Kwon, Y. -J.Lange, J. S.Lee, I. S.Li, C. H.Li, H.Li, L.Li, Y.Gioi, L. LiLibby, J.Liventsev, D.Lubej, M.Masuda, M.Matvienko, D.Miyabayashi, K.Miyata, H.Mizuk, R.Mohanty, G. B.Moll, A.Moon, H. K.Mussa, R.Nakano, E.Nakao, M.Nanut, T.Nath, K. J.Nayak, M.Negishi, K.Niiyama, M.Nisar, N. K.Nishida, S.Ogawa, S.Okuno, S.Olsen, S. L.Pakhlova, G.Pal, B.Park, C. W.Park, H.Pedlar, T. K.Pestotnik, R.Petric, M.Piilonen, L. E.Pulvermacher, C.Rauch, J.Ritter, M.Rostomyan, A.Ryu, S.Sahoo, H.Sakai, Y.Sandilya, S.Santelj, L.Sanuki, T.Sato, Y.Savinov, V.Schlueter, T.Schneider, O.Schnell, G.Schwanda, C.Schwartz, A. J.Seino, Y.Senyo, K.Seon, O.Seong, I. S.Sevior, M. E.Shebalin, V.Shibata, T. -A.Shiu, J. -G.Shwartz, B.Simon, F.Sohn, Y. -S.Sokolov, A.Stanic, S.Staric, M.Stypula, J.Sumihama, M.Sumiyoshi, T.Takizawa, M.Tamponi, U.Teramoto, Y.Trabelsi, K.Trusov, V.Uchida, M.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Usov, Y.Vanhoefer, P.Varner, G.Varvell, K. E.Vinokurova, A.Vossen, A.Wagner, M. N.Wang, C. H.Wang, M. -Z.Wang, P.Wang, X. L.Watanabe, Y.Williams, K. M.Won, E.Yamaoka, J.Yashchenko, S.Ye, H.Yelton, J.Yuan, C. Z.Yusa, Y.Zhang, Z. P.Zhilich, V.Zhulanov, V.Zupanc, A.
Issue Date
27-6월-2016
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.117, no.1
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW LETTERS
Volume
117
Number
1
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/88301
DOI
10.1103/PhysRevLett.117.011801
ISSN
0031-9007
Abstract
We report the first observation of the decay Lambda(+)(c) -> pK(+)pi(-) 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(Lambda(+)(c) -> pK(+)pi(-))/B(Lambda(+)(c) -> pK(-)pi(+)) = (2.35 +/- 0.27 +/- 0.21) x 10(-3), where the uncertainties are statistical and systematic, respectively.
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