MEASUREMENT OF THE CKM MATRIX ELEMENT |V(UB)| WITH CHARMLESS EXCLUSIVE SEMILEPTONIC B MESON DECAYS AT BABAR [report]

Leif H Wilden
2002 unpublished
We present a preliminary measurement of the branching fraction for B → ρeν and of the CKM matrix element |V ub | using approximately 55 million BB meson pairs collected with the BABAR detector. Using isospin relations for several modes we find B(B 0 → ρ − e + ν) = (3.39 ± 0.44 ± 0.52 ± 0.60) × 10 −4 |V ub | = (3.69 ± 0.23 ± 0.27 +0.40 −0.59 ) × 10 −3 . The quoted errors are statistical, systematic, and theoretical respectively. These results are obtained by using five different form-factor
more » ... nt form-factor calculations.
doi:10.2172/799956 fatcat:ixgg3oar5nci3fi3gphaqbnf2e