Observation of the doubly cabibbo-suppressed decay D_{s};{+}-->K;{+}K;{+}pi;{-}

• Published in: Physical review letters Vol. 102; no. 22; p. 221802
• Main Authors: Ko, B R, Won, E, Aihara, H, Arinstein, K, Aushev, T, Bakich, A M, Balagura, V, Barberio, E, Bondar, A, Bozek, A, Bracko, M, Brodzicka, J, Browder, T E, Chen, A, Cheon, B G, Cho, I-S, Choi, Y, Drutskoy, A, Dungel, W, Eidelman, S, Gabyshev, N, Goldenzweig, P, Golob, B, Ha, H, Haba, J, Han, B-Y, Hayasaka, K, Hayashii, H, Hoshi, Y, Hou, W-S, Hyun, H J, Itoh, R, Iwasaki, M, Kah, D H, Kang, J H, Kapusta, P, Kawasaki, T, Kichimi, H, Kim, H J, Kim, H O, Kim, S K, Kim, Y I, Kim, Y J, Kinoshita, K, Korpar, S, Krokovny, P, Kuzmin, A, Kwon, Y-J, Kyeong, S-H, Lee, M J, Lee, S E, Lesiak, T, Li, J, Limosani, A, Liu, C, Liu, Y, Liventsev, D, Louvot, R, Macnaughton, J, Mandl, F, McOnie, S, Medvedeva, T, Miyata, H, Miyazaki, Y, Nakano, E, Nakao, M, Natkaniec, Z, Nishida, S, Nishimura, K, Nitoh, O, Ogawa, S, Ohshima, T, Okuno, S, Ozaki, H, Pakhlov, P, Pakhlova, G, Palka, H, Park, C W, Park, H, Park, H K, Park, K S, Pestotnik, R, Piilonen, L E, Sahoo, H, Sakai, K, Sakai, Y, Schneider, O, Schwanda, C, Sekiya, A, Senyo, K, Sevior, M E, Shapkin, M, Shen, C P, Shiu, J-G, Shwartz, B, Stanic, S, Staric, M, Sumiyoshi, T, Tanaka, M, Taylor, G N
• Format: Journal Article
• Language: English
• Published: United States 05.06.2009
• ISSN: 0031-9007

We report the first observation of the doubly Cabibbo-suppressed decay D_{s};{+}-->K;{+}K;{+}pi;{-} using 605 fb;{-1} of data collected with the Belle detector at the KEKB asymmetric-energy e;{+}e;{-} collider. The branching ratio with respect to its Cabibbo-favored counterpart B(D_{s};{+}-->K;{+}K;{+}pi;{-})/B(D_{s};{+}-->K;{+}K;{-}pi;{+}) is (0.229+/-0.028+/-0.012)%, where the first uncertainty is statistical and the second is systematic. We also report a significantly improved measurement of the doubly Cabibbo-suppressed decay D;{+}-->K;{+}pi;{+}pi;{-}, with a branching ratio B(D;{+}-->K;{+}pi;{+}pi;{-})/B(D;{+}-->K;{-}pi;{+}pi;{+})=(0.569+/-0.018+/-0.014)%.