Measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vub| with B → ρev decays

Bernard A. Aubert,R. Barate, D. Boutigny,Jean Marc Gaillard,Adlène Hicheur,Yannis Karyotakis,Jean Pierre Lees,Patrick Robbe,Vincent Tisserand,Amina Zghiche,Antimo Palano, A. Pompili,Jin Chen,NaDing Qi,Gang Rong,Pinǵ Wang,YongSheng Zhu,Gerald Eigen,I. Ofte,Bjarne Stugu,Gerald S. Abrams,AW W. Borgland,A. B. Breon,David N. Brown,Janice Button-Shafer,Robert N. Cahn, E. Charles,Michael Gill,Andrei V. Gritsan,Y. Groysman,Robert G. Jacobsen,R. W. Kadel,John A. Kadyk,Leroy T. Kerth,Yu G. Kolomensky,Jiri F. Kral,C. M. LeClerc,Michael E. Levi,Gerald R. Lynch,Ll M. Mir,Piermaria J. Oddone,Toyoko J. Orimoto,Morris Pripstein,Natalie Roé,Alexandru Romosan,Michael T. Ronan,Vasia G. Shelkov,Alexander V. Telnov,William A. Wenzel,Timothy J E Harrison,Chris M. Hawkes,D. J. Knowles,S. W. O'Neale,RC C. Penny,A. T. Watson,Nigel Keith Watson,T. Deppermann,K. Goetzen,Helmut J. Koch,Bernd Lewandowski,M. Pelizaeus,Klaus J. Peters,H. G. Schmuecker,Michael Steinke,Nick R. Barlow,Wahid Bhimji,Jamie T. Boyd,Nicole I. Chevalier,P. J. Clark,W. N. Cottingham,C. K. Mackay,Fergus F. Wilson,Christopher Hearty,Thomas S. Mattison,Janis A. McKenna,D. M. Thiessen,Simon W. Jolly,Paul Kyberd,Adrian K. McKemey,Vladimir E. Blinov,A. D. Bukin,A. R. Buzykaev,Vladimir B. Golubev,Vladimir N. Ivanchenko,Aleksandr A. Korol,E. A. Kravchenko,A. P. Onuchin,Sergey I. Serednyakov,Yu I. Skovpen,A. N. Yushkov,D. S. Best,M. Chao,David Kirkby,Andrew James Lankford,Mark A. Mandelkern,Steve J. McMahon,Remigius K. Mommsen,David P. Stoker

Physical Review Letters（2003）

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摘要

The branching fraction Β(Β0→rho;- e+v)=(3.29±0.42±0.47±0.55)x10-4 was measured using isospin constraints and extrapolating to all electron energies according to five different form-factor calculations. The errors are statistical, systematic, and theoretical. The value of |Vub| determined by the same form-factor calculations is |Vub|=(3/64±0.22±0.25-0.56 +0.39) X 10-3.

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