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

B R Ko; E Won; H Aihara; K Arinstein; T Aushev; A M Bakich; V Balagura; E Barberio; A Bondar; A Bozek; M Bracko; J Brodzicka; T E Browder; A Chen; B G 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 J Hyun; R Itoh; M Iwasaki; D H Kah; J H Kang; P Kapusta; T Kawasaki; H Kichimi; H J Kim; H O Kim; S K Kim; Y I Kim; Y J Kim; K Kinoshita; S Korpar; P Krokovny; A Kuzmin; Y-J Kwon; S-H Kyeong; M J Lee; S E 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 W Park; H Park; H K Park; K S Park; R Pestotnik; L E Piilonen; H Sahoo; K Sakai; Y Sakai; O Schneider; C Schwanda; A Sekiya; K Senyo; M E Sevior; M Shapkin; C P Shen; J-G Shiu; B Shwartz; S Stanic; M Staric; T Sumiyoshi; M Tanaka; G N Taylor; Y Teramoto; K Trebelsi; S Uehara; K Ueno; T Uglov; Y Unno; S Uno; G Varner; K E Varvell; K Vervink; C C Wang; C H Wang; P Wang; X L Wang; Y Watanabe; R Wedd; B D Yabsley; Y Yamashita; Z P Zhang; V Zhilich; T Zivko; A Zupanc; O Zyukova; Belle Collaboration

doi:10.1103/PhysRevLett.102.221802

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

Phys Rev Lett. 2009 Jun 5;102(22):221802. doi: 10.1103/PhysRevLett.102.221802. Epub 2009 Jun 5.

Authors

B R Ko¹, E Won, H Aihara, K Arinstein, T Aushev, A M Bakich, V Balagura, E Barberio, A Bondar, A Bozek, M Bracko, J Brodzicka, T E Browder, A Chen, B G 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 J Hyun, R Itoh, M Iwasaki, D H Kah, J H Kang, P Kapusta, T Kawasaki, H Kichimi, H J Kim, H O Kim, S K Kim, Y I Kim, Y J Kim, K Kinoshita, S Korpar, P Krokovny, A Kuzmin, Y-J Kwon, S-H Kyeong, M J Lee, S E 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 W Park, H Park, H K Park, K S Park, R Pestotnik, L E Piilonen, H Sahoo, K Sakai, Y Sakai, O Schneider, C Schwanda, A Sekiya, K Senyo, M E Sevior, M Shapkin, C P Shen, J-G Shiu, B Shwartz, S Stanic, M Staric, T Sumiyoshi, M Tanaka, G N Taylor, Y Teramoto, K Trebelsi, S Uehara, K Ueno, T Uglov, Y Unno, S Uno, G Varner, K E Varvell, K Vervink, C C Wang, C H Wang, P Wang, X L Wang, Y Watanabe, R Wedd, B D Yabsley, Y Yamashita, Z P Zhang, V Zhilich, T Zivko, A Zupanc, O Zyukova; Belle Collaboration

Affiliation

¹ Korea University, Seoul.

PMID: 19658854
DOI: 10.1103/PhysRevLett.102.221802

Abstract

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)%.