A comment on the extractions of Vub from radiative decays

Adam K. Leibovich; Ian Low; I. Z. Rothstein

doi:10.1016/S0370-2693(01)00667-0

A comment on the extractions of V_ub from radiative decays

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

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

We present a model independent closed form expression for |V_ub|²/|V_tbV_ts*| 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 |V_ub| 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 language	English (US)
Pages (from-to)	83-87
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	513
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(01)00667-0
State	Published - Jul 26 2001

Funding

We would like to thank Zoltan Ligeti and Matthias Neubert for useful discussions. This work was supported in part by the Department of Energy under grant number DOE-ER-40682-143 and DE-AC02-76CH03000. A.K.L. would like to thank the theory group at CMU for its hospitality.

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/S0370-2693(01)00667-0

Cite this

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title = "A comment on the extractions of Vub from radiative decays",

abstract = "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.",

author = "Leibovich, {Adam K.} and Ian Low and Rothstein, {I. Z.}",

note = "Funding Information: We would like to thank Zoltan Ligeti and Matthias Neubert for useful discussions. This work was supported in part by the Department of Energy under grant number DOE-ER-40682-143 and DE-AC02-76CH03000. A.K.L. would like to thank the theory group at CMU for its hospitality.",

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doi = "10.1016/S0370-2693(01)00667-0",

language = "English (US)",

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TY - JOUR

T1 - A comment on the extractions of Vub from radiative decays

AU - Leibovich, Adam K.

AU - Low, Ian

AU - Rothstein, I. Z.

N1 - Funding Information: We would like to thank Zoltan Ligeti and Matthias Neubert for useful discussions. This work was supported in part by the Department of Energy under grant number DOE-ER-40682-143 and DE-AC02-76CH03000. A.K.L. would like to thank the theory group at CMU for its hospitality.

PY - 2001/7/26

Y1 - 2001/7/26

N2 - 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.

AB - 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.

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