Observation Of The Doubly Cabibbo-Suppressed Decay D-S(+)-> K+K+Pi(-)

B. R. Ko,E. Won,H. Aihara, K. Arinstein,T. Aushev, A. Bakich,V. Balagura,E. Barberio,A. Bondar,A. Bozek,M. Bračko,J. Brodzicka,T. Browder,A. Chen,B. Cheon,I.-S. Cho,Y. Choi,A. Drutskoy,W. Dungel,S. Eidelman,N. Gabyshev, P. Goldenzweig,B. Golob,H. Ha,J. Haba,B.-Y. Han,K. Hayasaka,H. Hayashii,Y. Hoshi,W.-S. Hou,H. Hyun,R. Itoh,M. Iwasaki,D. Kah,J. Kang,P. Kapusta, T. Kawasaki,H. Kichimi,H. Kim,S. Kim,Y. Kim,K. Kinoshita,S. Korpar,P. Krokovny,A. Kuzmin,Y.-J. Kwon,S.-H. Kyeong,M. Lee,S. Lee,T. Lesiak,J. Li,A. Limosani,C. Liu,Y. Liu,D. Liventsev,R. Louvot,J. MacNaughton,F. Mandl,S. McOnie, T. Medvedeva,H. Miyata,Y. Miyazaki,E. Nakano, M. Nakao,Z. Natkaniec,S. Nishida,K. Nishimura,O. Nitoh,S. Ogawa,T. Ohshima, S. Okuno,H. Ozaki,P. Pakhlov,G. Pakhlova,H. Palka,C. Park,H. Park,K. Park,R. Pestotnik,L. Piilonen,H. Sahoo,K. Sakai,Y. Sakai,O. Schneider,C. Schwanda,A. Sekiya,K. Senyo,M. Sevior,M. Shapkin,C. Shen,J.-G. Shiu,B. Shwartz,S. Stanič,M. Starič,T. Sumiyoshi,M. Tanaka,G. Taylor,Y. Teramoto, K. Trebelsi,S. Uehara,K. Ueno,T. Uglov,Y. Unno,S. Uno, G. Varner,K. Varvell,K. Vervink,C. Wang,P. Wang,X. Wang,Y. Watanabe,R. Wedd,B. Yabsley,Y. Yamashita,Z. Zhang,V. Zhilich,T. Zivko, A. Zupanc,O. Zyukova

PHYSICAL REVIEW LETTERS（2009）

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摘要

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)%.

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physics,detector

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