Observation of the suppressed ADS modes B ± → [ π ± K ∓
R. Aaij,B. Adeva,M. Adinolfi,C. Adrover,A. Affolder,Z. Ajaltouni,J. Albrecht,F. Alessio,M. Alexander,S. Ali,G. Alkhazov,P. Alvarez Cartelle,A. A. Alves,S. Amato,S. Amerio,Y. Amhis,L. Anderlini,J. Anderson,R. Andreassen,J. E. Andrews,R. B. Appleby,O. Aquines Gutierrez,F. Archilli,А. Артамонов,M. Artuso,E. Aslanides,G. Auriemma,M. Baalouch,S. Bachmann,J. J. Back,C. Baesso,V. Balagura,W. Baldini,R. J. Barlow,C. Barschel,S. Barsuk,W. Barter,Th. Bauer,A. Bay,J. Beddow, F. Bedeschi,I. Bediaga,S. Belogurov,K. Belous,I. Belyaev, E. Ben-Haim, G. Bencivenni,S. Benson,J. Benton,A. Berezhnoy,R. Bernet,M. O. Bettler,M. van Beuzekom,A. Bień,S. Bifani,T. Bird,A. Bizzeti,P. M. Bjørnstad,T. Blake,F. Blanc,J. Blouw,S. Blusk,V. Bocci,A. Bondar,N. Bondar,W. Bonivento,S. Borghi,A. Borgia,T. J. V. Bowcock,E. Bowen,C. Bozzi,T. Brambach,J. van den Brand,J. Bressieux,D. Brett,M. Britsch,T. Britton,N. H. Brook,H. Brown,I. Burducea,A. Bursche,G. Busetto,J. Buytaert,S. Cadeddu,O. Callot,M. Calvi,M. Calvo Gomez,A. Camboni,P. Campana,D. Campora Perez,A. Carbone,G. Carboni,R. Cardinale,A. Cardini,H. Carranza-Mejia,L. Carson,K. Carvalho Akiba,G. Casse,L. Castillo García,M. Cattaneo,Ch. Cauet,R. Cenci,M. Charles,Ph. Charpentier,P. Chen,N. Chiapolini,M. Chrząszcz,K. Ciba,X. Cid Vidal,G. Ciezarek,P. E. L. Clarke,M. Clemencic,H. V. Cliff,J. Closier,C. Coca,V. Coco,J. Cogan,E. Cogneras,P. Collins,A. Comerma-Montells,A. Contu,A. Cook,M. Coombes,S. Coquereau,G. Corti, B. Couturier,G. Cowan,D. C. Craik,S. Cunliffe,R. Currie, C. D’Ambrosio, P. David,P. David,A. Davis,I. De Bonis,K. De Bruyn,S. De Capua,M. De Cian,J. M. De Miranda,L. De Paula,W. De Silva,P. De Simone,D. Décamp,M. Deckenhoff,L. Del Buono,N. Déĺeage,Д. Деркач,O. Deschamps,F. Dettori,A. Di Canto,H. Dijkstra,M. Dogaru,S. Donleavy,F. Dordei,A. Dosil Suárez,D. Dossett,A. Dovbnya,F. Dupertuis,P. Durante,R. Dzhelyadin,A. Dziurda,A. Dzyuba,S. Easo,U. Egede,V. Egorychev,S. Eidelman,D. van Eijk,S. Eisenhardt,U. Eitschberger,R. Ekelhof,L. Eklund,I. El Rifai,Ch. Elsässer,A. Falabella,C. Färber, G. Fardell,C. Farinelli,S. Farry,D. Ferguson,V. Fernandez Albor,F. Ferreira Rodrigues,M. Ferro‐Luzzi,S. Filippov,M. Fiore,C. Fitzpatrick,M. Fontana,F. Fontanelli,R. Forty,O. De Aguiar Francisco,M. Frank,C. Frei,M. Frosini,S. Furcas,E. Furfaro,A. Gallas Torreira,D. Galli,M. Gandelman,P. Gandini,Y. Gao,J. Garofoli,P. Garosi,J. Garra Ticó,L. Garrido,C. Gaspar,R. Gauld,E. Gersabeck,M. Gersabeck,T. Gershon, Ph. Ghez,V. Gibson, L. Giubega,V. V. Gligorov,C. Göbel,D. Golubkov,A. Golutvin,A. Gomes,P. A. Gorbounov,Hamish Gordon, C. Gotti,M. Grabalosa Gándara,R. Graciani Diaz,L. A. Granado Cardoso,E. Graugés, G. Graziani,A. Grecu,E. Greening,S. Gregson,P. Griffith,O. Grünberg,B. Gui,E. Gushchin,Yu. Guz,T. Gys,C. Hadjivasiliou,G. Haefeli,C. Haen,S. C. Haines,S. Hall,B. Hamilton,T. Hampson,S. Hansmann-Menzemer,N. Harnew,S. T. Harnew,J. Harrison,T. Hartmann,J. He,T. Head,V. Heijne,K. Hennessy,P. Henrard,J. A. 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Tran,M. Tresch,A. Tsaregorodtsev,P. Tsopelas,N. Tuning,M. Ubeda Garcia,A. Ukleja, D. Urner,A. Ustyuzhanin,U. Uwer,V. Vagnoni,G. Valenti,A. Vallier,M. Van Dijk,R. Vazquez Gomez,P. Vázquez Regueiro,C. Vázquez Sierra,S. Vecchi,J. J. Velthuis,M. Veltri,G. Veneziano,M. Vesterinen,B. Viaud,D. Vieira,X. Vilasís-Cardona,A. Vollhardt,D. Volyanskyy,D. Voong,A. Vorobyev,V. Vorobyev,C. Voß,H. Voss,R. Waldi,C. Wallace,R. Wallace,S. Wandernoth,J. Wang,D. R. Ward,N. K. Watson,A. D. Webber,D. Websdale,M. Whitehead,J. Wicht,J. Wiechczynski,D. Wiedner,L. Wiggers,G. Wilkinson, M. Williams,M. Williams,F. F. Wilson,J. Wimberley,J. Wishahi,W. Wiślicki,M. Witek,S. A. Wotton,S. Wright,S. L. Wu,K. Wyllie,Y. Xie,Z. Xing,Z. Yang,R. Young,X. Yuan,O. Yushchenko,M. Zangoli, M. Zavertiaev,F. Zhang, L. Zhang,W. C. Zhang,Y. Zhang,A. Zhelezov,A. Zhokhov,L. Zhong,A. Zvyagin
Physics Letters B（2013）
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摘要
An analysis of B±→DK± and B±→Dπ± decays is presented where the D meson is reconstructed in the four-body final state K±π∓π+π−. Using LHCb data corresponding to an integrated luminosity of 1.0fb−1, first observations are made of the suppressed ADS modes B±→[π±K∓π+π−]DK± and B±→[π±K∓π+π−]Dπ± with a significance of 5.1σ and greater than 10σ, respectively. Measurements of CP asymmetries and CP-conserving ratios of partial widths from this family of decays are also performed. The magnitude of the ratio between the suppressed and favoured B±→DK± amplitudes is determined to be rBK=0.097±0.011.
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