This title appears in the Scientific Report :
2014
Please use the identifier:
http://hdl.handle.net/2128/8364 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.89.053015 in citations.
Bl4 decays and the extraction of |Vub|
Bl4 decays and the extraction of |Vub|
The Cabibbo-Kobayashi-Maskawa matrix element |Vub| is not well determined yet. It can be extracted from both inclusive or exclusive decays, like B→π(ρ)lν¯l. However, the exclusive determination from B→ρlν¯l, in particular, suffers from a large model dependence. In this paper, we propose to extract |...
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Personal Name(s): | Kang, Xian-Wei (Corresponding Author) |
---|---|
Kubis, Bastian / Hanhart, Christoph / Meissner, Ulf-G. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 Theorie der Starken Wechselwirkung; IAS-4 |
Published in: | Physical Review D Physical review / D, 89 89 (2014 2014) 5 5, S. 053015 053015 |
Imprint: |
[S.l.]
Soc.
2014
2014-03-28 2014-03-01 |
DOI: |
10.1103/PhysRevD.89.053015 |
Document Type: |
Journal Article |
Research Program: |
TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik Hadron Structure and Dynamics (HSD) |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.89.053015 in citations.
The Cabibbo-Kobayashi-Maskawa matrix element |Vub| is not well determined yet. It can be extracted from both inclusive or exclusive decays, like B→π(ρ)lν¯l. However, the exclusive determination from B→ρlν¯l, in particular, suffers from a large model dependence. In this paper, we propose to extract |Vub| from the four-body semileptonic decay B→ππlν¯l, where the form factors for the pion-pion system are treated in dispersion theory. This is a model-independent approach that takes into account the ππ rescattering effects, as well as the effect of the ρ meson. We demonstrate that both finite-width effects of the ρ meson as well as scalar ππ contributions can be considered completely in this way. |