Measurement ofϕ3with Dalitz plot analysis ofB±→D(*)K±decay

A Poluektov,I Bizjak,A Somov,S Korpar,H Ozaki,R Guo,Z P Zhang,H Sagawa,B G Cheon,T Aziz,N Soni,Y Yamada,P Chang,J Brodzicka,S Blyth,M Yamauchi,U Bitenc,R Seuster,T Tsukamoto,Y Enari,T E Browder,L E Piilonen,T Aushev,D Marlow,M Watanabe,K Senyo,C Schwanda,K Trabelsi,Y Nagasaka,T Nagamine,S Uehara,J Ying,S H Lee,H Miyata,N Katayama,B Golob,Y Choi,T Gershon,J Haba,T Hokuue,N Parslow,A Kuzmin,C H Wang,G Varner,D Zürcher,Y Sakai,V Eiges,P Pakhlov,S Okuno,K Miyabayashi,S Stanič,T Nozaki,A M Bakich,H Shibuya,S Fratina,S Suzuki,M Tanaka,T Higuchi,M Bračko,A Ishikawa,K Hayasaka,V Sidorov,S Uno,J H Kang,R Chistov,M Starič,Y Hoshi,K E Varvell,T Ohshima,Y Asano,O Schneider,S Eidelman,T Nakadaira,O Tajima,G N Taylor,Y Unno,A Chuvikov,Y Yamashita,I Bedny,M Hazumi,G Gokhroo,T Sumiyoshi,R Mizuk,A Bondar,K Tamai,S Nishida,A Matyja,S Villa,S Ogawa,H Nakazawa,J Schümann,A Imoto,J Zhang,T Hara,Y Yusa,T Okabe,A J Schwartz,J Macnaughton,A Yamaguchi,B Shwartz,T Uglov,T Lesiak,K Kinoshita,W.-S Hou,M Iwasaki,K Ueno,T Kawasaki,R Itoh,R Stamen,P Krokovny,J S Kang,T Matsumoto,P Koppenburg,S Bahinipati,F Mandl,M Danilov,M Nakao,N Root,P Križan,D Žontar,H R Khan,K Sumisawa,H Hayashii,S L Zang,W Ostrowicz,H Aihara,Y Teramoto,V Zhilich,A Sugiyama,T Tsuboyama,H Iwasaki,H Kawai,Z Natkaniec,A Garmash,J Li,S K Kim,W Mitaroff,L Hinz,H J Kim,O Nitoh,S Semenov,M E Sevior,S L Olsen,N Sato,S U Kataoka,F Takasaki,M Dash,N Gabyshev,N Tamura,K Inami,J H Kim,Y Hsiung ,Takashi Mori ,Dong Liu ,Y J Kwon ,M Wang ,T Sarangi ,S W Lin ,Y Chào ,A Bożek ,Kazuo Abe ,Abe T ,M Różańska ,B Yabsley ,Saburou Saitoh ,S K Choi

doi:10.1103/physrevd.70.072003

Abstract

We present a measurement of the unitarity triangle angle phi_3 using a Dalitz plot analysis of the three-body decay of the neutral D meson from the B->D(*)K process. The method employs the interference between D0 and D0bar to extract both the weak and strong phases. We apply this method to a 140 fb^{-1} data sample collected by the Belle experiment. The analysis uses the modes B->DK and B->D*K, D*->D pi0, where the neutral D meson decays into K_Spi+pi-. We obtain 146 signal candidates for B->DK and 39 candidates for B->D*K. From a combined maximum likelihood fit to the B->DK and B->D*K modes, we obtain phi_3=77^{\circ}^{+17}_{-19}(stat)+-13^{\circ}(syst)}+-11^{\circ}(model). The corresponding two standard deviation interval is 26^{\circ}<phi_3<126^{\circ}.

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