A comment on the extractions of Vub from radiative decays

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


We present a model independent closed form expression for |Vub|2/|VtbVts*| 2, which includes the resummation of large endpoint logarithms as well as the interference effects from the operators O2 and O8. We demonstrate that the method to extract |Vub| presented by the authors in hep-ph/9909404, and modified in this Letter to include interference effects, is not just a refinement of the method introduced in hep-ph/9312311. We also discuss the model dependence of the latter proposal. Furthermore, we show that the resummation is not negligible and that the Landau pole does not introduce any significant uncertainties.

Original languageEnglish (US)
Pages (from-to)83-87
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - Jul 26 2001

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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