Observation Of D+ -> K+Eta(()'()) And Search For Cp Violation In D+ -> Pi(+)Eta(()'()) Decays

E Won,B R Ko,I Adachi, H Aihara,K Arinstein,D M Asner,T Aushev,A M Bakich, E Barberio, A Bay,V Bhardwaj,B Bhuyan,M Bischofberger,A Bondar,A Bozek, M Bracko,J Brodzicka,T E Browder,Pocheng Chang,A Chen,Peng Chen,B G Cheon,K Chilikin,I S Cho,K Cho,S K Choi,Yangkyu Choi,J Dalseno,M Danilov,Z Dolezal, Z Drasal,A Drutskoy,S Eidelman, J Fast,V Gaur,N Gabyshev,A Garmash,Y M Goh,B Golob,J Haba,T Hara,K Hayasaka, H Hayashii,Y Horii,Y Hoshi,W S Hou,Y B Hsiung,H J Hyun, T Iijima,K Inami,Akinori Ishikawa,R Itoh,M Iwabuchi, Y Iwasaki,Takashi Iwashita,N J Joshi,T Julius,J H Kang,Norio Katayama,T Kawasaki,H Kichimi,Hea Ok Kim, Ji Hong Kim,K T Kim,M J Kim,S K Kim,Young Jae Kim,K Kinoshita,N Kobayashi,S Koblitz, P Kodys,S Korpar, P Krizan,T Kumita,A Kuzmin,Y J Kwon,J S Lange,M J Lee,S H Lee,Jinping Li,Yi Li,J Libby,C L Lim,Chunling Liu,Yancheng Liu,D Liventsev,R Louvot,S Mconie,K Miyabayashi,Hiroshi Miyata,Yutaka Miyazaki,R Mizuk,G B Mohanty,Y Nagasaka,E Nakano,Mikihiko Nakao,Hiroyuki Nakazawa,Z Natkaniec,Stefan Neubauer,Shigeru Nishida,K Nishimura,O Nitoh,Satoshi Ogawa, T Ohshima,S Okuno,S L Olsen, Y Onuki,P Pakhlov,G Pakhlova,H K Park,K S Park,R Pestotnik, M Petric,L E Piilonen, M Roehrken,S Ryu,H Sahoo,Kiyoshi Sakai,Yoshinori Sakai,T Sanuki,O Schneider,C Schwanda,A J Schwartz,K Senyo,O Seon,M E Sevior, C P Shen,T A Shibata,J G Shiu,F Simon,J B Singh,P Smerkol,Y S Sohn,A Sokolov,E Solovieva,S Stanic, M Staric,M Sumihama,T Sumiyoshi,S Suzuki,G Tatishvili,Y Teramoto,K Trabelsi,Makoto Uchida,Shigeki Uehara,T Uglov, Y Unno,S Uno,Y Usov, S Vahsen, G Varner,A Vinokurova,C H Wang,M Z Wang,Peng Wang,Masao Watanabe,Yoshiyuki Watanabe,K M Williams,B D Yabsley,Y Yamashita,M Yamauchi,Z P Zhang,V Zhilich, V Zhulanov, A Zupanc,O Zyukova

PHYSICAL REVIEW LETTERS（2011）

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摘要

We report the first observation of the doubly Cabibbo-suppressed decays D+ -> K+eta(()'()) using a 791 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The ratio of the branching fractions of doubly Cabibbo-suppressed relative to singly Cabibbo-suppressed D+ -> pi(+)eta(()'()) decays are B(D+ -> K+eta) / B(D+ -> pi(+)eta) =(3.06 +/- 0.43 +/- 0.14)% and B(D+ -> K+eta')/B(D+->pi(+)eta') = (3.77 +/- 0.39 +/- 0.10)%. From these, we find that the relative final-state phase difference between the tree and annihilation amplitudes in D+ decays, delta(TA), is (72 +/- 9)degrees or (288 +/- 9)degrees. We also report the most precise measurements of CP asymmetries to date: A(CP)(D+->pi+eta) = (+1.74 +/- 1.13 +/- 0.19)% and A(CP)(D+->pi+eta') = (-0.12 +/- 1.12 +/- 0.17)%.

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