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A. Khodjamirian, R. Ruckl, S. Weinzierl and O. I. Yakovlev, Perturbative QCD correction to the light cone sum rule for the B* B pi and D* D pi couplings
1999
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G. Duplancic, A. Khodjamirian, T. Mannel, B. Melic and N. Offen, Light-cone sum rules for B → π B\to\pi form factors revisited
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C. Bourrely, I. Caprini and L. Lellouch, Model-independent description of B → π ℓ ν B\to\pi\ell\nu decays and a determination of | V u b | |V_{ub}|
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A. Khodjamirian, T. Mannel, N. Offen and Y. M. Wang, B → π ℓ ν l B\to\pi\ell\nu_{l} Width and | V u b | |V_{ub}| from QCD Light-Cone Sum Rules
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2011
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Particle Data Group
2012
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S. Faller, T. Feldmann, A. Khodjamirian, T. Mannel and D. van Dyk, Disentangling the Decay Observables in B − → π + π − ℓ − ν ¯ ℓ B^{-}\to\pi^{+}\pi^{-}\ell^{-}\bar{\nu}_{\ell}
Original
2014
Cited alongside, same era.
X.-W. Kang, B. Kubis, C. Hanhart and U.-G. Meißner, B l 4 B_{l4} decays and the extraction of | V u b | |V_{ub}|
Original
2014
Cited alongside, same era.
U.-G. Meißner and W. Wang, Generalized Heavy-to-Light Form Factors in Light-Cone Sum Rules
Original
2014
Cited alongside, same era.
I. Sentitemsu Imsong, A. Khodjamirian, T. Mannel and D. van Dyk, Extrapolation and unitarity bounds for the B → π B\to\pi form factor
Original
2015

Then

C. Hambrock and A. Khodjamirian, Form factors in B ¯ 0 → π π ℓ ν ¯ ℓ \bar{B}^{0}\to\pi\pi\ell\bar{\nu}_{\ell} from QCD light-cone sum rules
Original
2016
Later among the works it cites.
P. Böer, T. Feldmann and D. van Dyk, QCD Factorization Theorem for B → π π ℓ ν B\to\pi\pi\ell\nu Decays at Large Dipion Masses
Original
2017
Later among the works it cites.
S. Cheng, A. Khodjamirian and J. Virto, Timelike-helicity B → π π B\to\pi\pi form factor from light-cone sum rules with dipion distribution amplitudes
Original
2017
Later among the works it cites.
S. Cheng, A. Khodjamirian and J. Virto, B → π π B\to\pi\pi Form Factors from Light-Cone Sum Rules with B B -meson Distribution Amplitudes
Original
2017
Later among the works it cites.
R. Klein, T. Mannel, J. Virto and K. K. Vos, CP Violation in Multibody B B Decays from QCD Factorization

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2018

Revisiting $B \to \pi\pi \ell \nu$ at Large Dipion Masses

Feldmann, Thorsten, van Dyk, Danny, Vos, K. Keri

Understand

We revisit QCD factorization of $B\to \pi\pi$ form factors at large dipion masses, by deriving new constraints based on the analyticity properties of these objects.

We then propose a parametrization of the form factors, inspired by the leading-twist QCD factorization formula, that incorporates all known analytic properties.
This parameterization is used to interpolate between the QCDF results and the constraints from the $B^*$ pole.
Based on this interpolation, we predict the $B\to \pi\pi\ell\nu$ decay rate in a larger phase space region than previous studies could.