First Observation Of Cp Violation In (B)Over-Bar(0) -> D(Cp)((*))H(0) Decays By A Combined Time-Dependent Analysis Of Babar And Belle Data

A. Abdesselam,I. Adachi,A. Adametz,T. Adye,H. Ahmed,H. Aihara,S. Akar,M. S. Alam,J. Albert,S. Al Said,R. Andreassen,C. Angelini,F. Anulli,K. Arinstein,N. Arnaud,D. M. Asner,D. Aston,V. Aulchenko,T. Aushev,R. Ayad,V. Babu,I. Badhrees,S. Bahinipati,A. M. Bakich,H. R. Band,Sw. Banerjee,E. Barberio,D. J. Bard,R. J. Barlow,G. Batignani,A. Beaulieu,M. Bellis,E. Ben-Haim,D. Bernard,F. U. Bernlochner,S. Bettarini,D. Bettoni,A. J. Bevan,V. Bhardwaj,B. Bhuyan,F. Bianchi,M. Biasini,J. Biswal,V. E. Blinov,P. C. Bloom,A. Bobrov,M. Bomben,A. Bondar,G. R. Bonneaud,G. Bonvicini,A. Bozek,C. Bozzi,M. Bracko,H. Briand,T. E. Browder,D. N. Brown,D. N. Brown,C. Buenger,P. R. Burchat,A. R. Buzykaev,R. Calabrese,A. Calcaterra,G. Calderini,M. Carpinelli,C. Cartaro,G. Casarosa,R. Cenci,D. Cervenkov,P. Chang,D. S. Chao,J. Chauveau,R. Cheaib,V. Chekelian,A. Chen,C. Chen,C. H. Cheng,B. G. Cheon,K. Chilikin,R. Chistov,K. Cho,V. Chobanova,H. H. F. Choi,S-K. Choi,M. Chrzaszcz,G. Cibinetto,D. Cinabro,J. Cochran,J. P. Coleman,R. Contri,M. R. Convery,G. Cowan,R. Cowan,L. Cremaldi,J. Dalseno,S. Dasu,M. Davier,C. L. Davis,F. De Mori,G. De Nardo,A. G. Denig,D. Derkach,R. De Sangro,B. Dey,F. Di Lodovico,J. Dingfelder,S. Dittrich,Z. Dolezal,J. Dorfan,Z. Drasal,A. Drutskoy,V. P. Druzhinin,G. P. Dubois-Felsmann,W. Dunwoodie,D. Dutta,M. Ebert,B. Echenard,S. Eidelman,G. Eigen,A. M. Eisner,S. Emery,J. A. Ernst,R. Faccini,H. Farhat,J. E. Fast,M. Feindt,T. Ferber,F. Ferrarotto,F. Ferroni,R. C. Field,A. Filippi,G. Finocchiaro,E. Fioravanti,K. T. Flood,W. T. Ford,F. Forti,M. Franco Sevilla,M. Fritsch,J. R. Fry,B. G. Fulsom,E. Gabathuler,N. Gabyshev,D. Gamba,A. Garmash,J. W. Gary,I. Garzia,M. Gaspero,V. Gaur,A. Gaz,T. J. Gershon,D. Getzkow,R. Gillard,L. Li Gioi,M. A. Giorgi,R. Glattauer,R. Godang,Y. M. Goh,P. Goldenzweig,B. Golob,V. B. Golubev,R. Gorodeisky,W. Gradl,M. T. Graham,E. Grauges,K. Griessinger,A. V. Gritsan,G. Grosdidier,O. Gruenberg,N. Guttman,J. Haba,A. Hafner,B. Hamilton,T. Hara,P. F. Harrison,C. 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PHYSICAL REVIEW LETTERS（2015）

Cited 24|Views531

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Abstract

We report a measurement of the time-dependent CP asymmetry of (B) over bar (0) -> D(CP)((*))h(0) decays, where the light neutral hadron h(0) is a pi(0), eta , or omega meson, and the neutral D meson is reconstructed in the CP eigenstates K+K-, K-S(0)pi(0) or K-S(0)omega. The measurement is performed combining the final data samples collected at the Upsilon(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471 +/- 3) x 10(6) B (B) over bar pairs recorded by the BABAR detector and (772 +/- 11) x 10(6) B (B) over bar pairs recorded by the Belle detector. We measure the CP asymmetry parameters -eta S-f = +0.66 +/- 0.10(stat) +/- 0.06(syst) and C = -0.02 +/- 0.07(stat) +/- 0.03(syst). These results correspond to the first observation of CP violation in (B) over bar (0) -> D(CP)((*))h(0) decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.

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