First observation ofCPviolation and improved measurement of the branching fraction and polarization ofB0→D*+D*−decays

B Kronenbitter,J Yamaoka,P Smerkol,G B Mohanty,M Nakao,T Aushev,T Iijima,T E Browder,B R Ko,D Liventsev,A M Bakich,T Sanuki,P Vanhoefer,V Gaur,K Miyabayashi,A Chen,K Nishimura,M Feindt,S Okuno,G Pakhlova,Y Usov,A Ishikawa,M Uchida,T Uglov,Y Choi,Y Sakai,T Kawasaki,M Starič,A Zupanc,M Sumihama,S Mconie,T Ohshima,O Brovchenko,C H Wang,S Nishida,Z Doležal,O Nitoh,T Kuhr,R Mizuk,Y Iwasaki,S Uno,M Iwabuchi,H Hayashii,Y M Goh,H Miyata,M Shapkin,R Itoh,E Solovieva,P Kapusta,K Inami,T Sumiyoshi,D M Asner,V Bhardwaj,E Won,S Uehara,P Križan,S Eidelman,H Park,Y Teramoto,R Chistov,K Senyo,Y Li,D Mohapatra,K Trabelsi,T Kumita,G Tatishvili,C P Shen,Y Yamashita,S Koblitz,T Tsuboyama,A Drutskoy,B G Cheon,S Korpar,I Adachi,L E Piilonen,V Chekelian,M Röhrken,S L Olsen,P Pakhlov,Y Hoshi,S Esen,Z Drásal,M Bračko,J Libby,Y Onuki,M E Sevior,C Schwanda,M Barrett,H Ozaki,V Vorobyev,P Krokovny,J H Kang,A J Schwartz,A Moll,K Arinstein,J Dalseno,R Louvot,K Kinoshita,R Pestotnik,M J Kim,C Kiesling,K Sumisawa,J Haba,O Schneider,S Sandilya,H Sahoo,E Nakano,K Belous,B Bhuyan,Y Watanabe,T Julius,N Gabyshev,K M Williams,B Yabsley ,J G Shiu ,Y J Kim,M Prim,C W Park,K T Kim,A Bondar,Y Horii,L Šantelj ,P Chen,P Wang,Y Liu,J E Fast,Y Unno,Y S Sohn ,F Simon,V Zhulanov,Y J Kwon ,C R Ng ,W.-S Hou ,S Ryu,Richard T Kouzes ,T Aziz,Soohyung Lee ,S Stanič,A Sibidanov,H Aihara,D Zander,K Cho,J B Kim,M Petrič,I S Cho ,A Bożek ,Z Q Liu,S Neubauer,G Varner,K E Varvell,T A Shibata ,Y Hsiung ,H J Kim,A Sokolov,P Kodyš,J Li,M Ritter,V Zhilich,J H Kim,R Kumar

doi:10.1103/physrevd.86.071103

First observation ofCPviolation and improved measurement of the branching fraction and polarization ofB0→D+D−decays

B Kronenbitter, J Yamaoka + Show 158 more

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https://doi.org/10.1103/physrevd.86.071103

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Journal: Physical Review D	Publication Date: Oct 18, 2012
Citations: 5	License type: publisher-specific, author manuscript

Affiliation: Karlsruhe Institute of Technology, Tata Institute of Fundamental Research, Nagoya University, Korea University, University of Sydney, Tohoku University, Max Planck Society, Nara Women's University, National Central University, Kanagawa University, Novosibirsk State University, Tokyo Institute of Technology, Sungkyunkwan University, Niigata University, Gifu University, National United University, Charles University, Tokyo University of Agriculture and Technology, Yonsei University, Hanyang University, Polish Academy of Sciences, Tokyo Metropolitan University, Pacific Northwest National Laboratory, University of Ljubljana, Kyungpook National University, Osaka City University, Yamagata University, Virginia Tech, University of Maribor, Seoul National University, Tohoku Gakuin University, University of Cincinnati, Indian Institute of Technology Madras, The University of Tokyo, University of Melbourne, Austrian Academy of Sciences, École Polytechnique Fédérale de Lausanne, Indian Institute of Technology Guwahati

#CP Violation In B0 #Parameters Of CP Violation + Show 8 more

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Abstract

We report the measurement of the branching fraction, the polarization, and the parameters of the time-dependent CP violation in B0 -> D*+ D*- decays using a data sample of 772 million BB pairs, collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain a branching fraction of B = (7.82 +- 0.38 +- 0.63) x10^{-4}, a CP-odd fraction of R_\perp = 0.138 +- 0.024 +- 0.006 and, additionally, a fraction of the longitudinal component in the transversity base of R_0 = 0.624 +- 0.029 +- 0.011. The measured values of the parameters of the CP violation are S_{D*+ D*-} = -0.79 +- 0.13 +- 0.03 and A_{D*+ D*-} = 0.15 +- 0.08 +- 0.04.

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