Extracting Vub without recourse to structure functions

Adam K. Leibovich*, Ian Low, I. Z. Rothstein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

99 Scopus citations


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 languageEnglish (US)
Article number053006
Pages (from-to)1-9
Number of pages9
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
StatePublished - Mar 1 2000

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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