Measurement of the Bs(0) → Ds-Ds+ and Bs(0) → D-Ds+ effective lifetimes.
R Aaij,B Adeva,M Adinolfi,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,M Andreotti,J E Andrews,R B Appleby,O Aquines Gutierrez,F Archilli,A Artamonov,M Artuso,E Aslanides,G Auriemma,M Baalouch,S Bachmann,J J Back,A Badalov,V Balagura,W Baldini,R J Barlow,C Barschel,S Barsuk,W Barter,V Batozskaya,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 Bien,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,M Borsato,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,A Bursche,G Busetto,J Buytaert,S Cadeddu,R Calabrese,O Callot,M Calvi,M Calvo Gomez,A Camboni,P Campana,D Campora Perez,A Carbone,G Carboni,R Cardinale,A 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Filippov,M Fiore,M Fiorini,C Fitzpatrick,M Fontana,F Fontanelli,R Forty,O Francisco,M Frank,C Frei,M Frosini,E Furfaro,A Gallas Torreira,D Galli,M Gandelman,P Gandini,Y Gao,J Garofoli,P Garosi,J Garra Tico,L Garrido,C Gaspar,R Gauld,E Gersabeck,M Gersabeck,T Gershon,Ph Ghez,A Gianelle,V Gibson,L Giubega,V V Gligorov,C Göbel,D Golubkov,A Golutvin,A Gomes,H Gordon,M Grabalosa Gándara,R Graciani Diaz,L A Granado Cardoso,E Graugés,G Graziani,A Grecu,E Greening,S Gregson,P Griffith,L Grillo,O Grünberg,B Gui,E Gushchin,Yu Guz,T Gys,C Hadjivasiliou,G Haefeli,C Haen,T W Hafkenscheid,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 Hernando Morata,E van Herwijnen,M Heß,A Hicheur,D Hill,M Hoballah,C Hombach,W Hulsbergen,P Hunt,T Huse,N Hussain,D Hutchcroft,D Hynds,V Iakovenko,M Idzik,P Ilten,R Jacobsson,A Jaeger,E Jans,P Jaton,A Jawahery,F Jing,M John,D Johnson,C R Jones,C Joram,B Jost,N Jurik,M 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Physical review letters（2014）
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摘要
The first measurement of the effective lifetime of the B(s)(0) meson in the decay B(s)(0) → Ds-Ds+ is reported using a proton-proton collision data set, corresponding to an integrated luminosity of 3 fb(-1), collected by the LHCb experiment. The measured value of the B(s)(0) → Ds-Ds+ effective lifetime is 1.379 ± 0.026 ± 0.017 ps, where the uncertainties are statistical and systematic, respectively. This lifetime translates into a measurement of the decay width of the light B(s)(0) mass eigenstate of ΓL = 0.725 ± 0.014 ± 0.009 ps(-1). The B(s)(0) lifetime is also measured using the flavor-specific B(s)(0)→ D-Ds+ decay to be 1.52 ± 0.15 ± 0.01 ps.
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