Conclusions & Perspectives (2)
B -
- B.R. = (fBu |Vub|)2 F(Gf,MB,M )
S.M. ~ 5 10 -5
L3 < 5.7 10 -4
- Babar/CLEO : tough
- (Vub ) / Vub ~ 30 %
extrapolate from charm
- fDs / fD+ fB /fD (use lattice QCD)
- fDs = 255 20 31 MeV (from Ds )
- fB = 178 25(exp.) ??? (th.)MeV
- - charm (fDs /fD+ ) ~ 3 % (?)