Journal
PHYSICAL REVIEW D
Volume 61, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.61.053006
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We present a closed form expression for \V-ub\(2)/\V-tb V-ts*\(2) in terms of the end point photon and lepton spectra from the inclusive decays B --> X(s)gamma and B --> X(u)l nu, respectively, which includes the resummation of the end point logarithms at next to leading order and is completely independent of the B meson structure function. The use of this expression for extracting V-ub would eliminate the large systematic errors usually incurred due to the modeling of the heavy quarks' Fermi motion.
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