We present a closed form expression for |Vub|2/|VtbVts*|2 in terms of the end point photon and lepton spectra from the inclusive decays B→Xsγ and B→Xuℓν, 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 Vub would eliminate the large systematic errors usually incurred due to the modeling of the heavy quarks' Fermi motion.
|Original language||English (US)|
|Number of pages||9|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Mar 1 2000|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)