Academic Journal
Key-Words: Semileptonic Decays of B Mesons, Determination of Kobayashi-Maskawa Matrix Elements (Vub)
| العنوان: | Key-Words: Semileptonic Decays of B Mesons, Determination of Kobayashi-Maskawa Matrix Elements (Vub) |
|---|---|
| المؤلفون: | Lattice-constrained Unitarity Bounds For, Laurent Lellouch |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://arxiv.org/pdf/hep-ph/9509358v6.pdf. |
| سنة النشر: | 1996 |
| المجموعة: | CiteSeerX |
| الوصف: | Lattice results, kinematical constraints and QCD dispersion relations are combined for the first time to derive model-independent bounds for QCD form factors and corresponding rates. To take into account the error bars on the lattice results we develop a general formalism which ascribes well-defined statistical properties to these bounds. We concentrate on ¯ B0 → π + ℓ−¯νℓ decays because of the relative simplicity of the analytical behavior of the relevant polarization functions and because of their immediate phenomenological relevance. To determine the range of applicability of the dispersive matching required to obtain the bounds, we have evaluated the leading perturbative and non-perturbative QCD corrections to the relevant polarization functions. Despite the lattice results ’ large error bars and limited kinematical range, the bounds we obtain appear to favor certain parametrizations for the form factors over others. The bounds also enable the determination of |Vub | from the total experimental rate with a theoretical error ranging from 27 % to 37%, depending on the assumptions made. The techniques developed here are, in fact, quite general and are not limited to use with lattice results nor to semileptonic ¯ B0 → π + ℓ−¯νℓ decays. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.346.8900; http://arxiv.org/pdf/hep-ph/9509358v6.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.346.8900 http://arxiv.org/pdf/hep-ph/9509358v6.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.C9B83B6B |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |