منابع مشابه
Model-independent determination of |Vub|
The decay distribution of the kinematic variable ξu in inclusive charmless semileptonic decays of B mesons is unique. The novel method for a model-independent determination of |Vub| is described. To appear in Proceedings of the 3rd International Conference on B Physics and CP Violation Taipei, Taiwan, December 3-7, 1999 MODEL-INDEPENDENT DETERMINATION OF |Vub| CHANGHAO JIN School of Physics, Un...
متن کاملPrecision determination of Vub
We review how to determine |Vub| from inclusive semileptonic B decay using combined cuts on the leptonic and hadronic invariant masses to eliminate the b → c background. This leads to a determination of |Vub| with theoretical uncertainty at the 5–10% level. LBNL-49079, UCSD/PTH 01-22, UTPT-01-13 The magnitude of Vub determines the length of one of the side of the unitarity triangle and is there...
متن کاملModel-independent determination of |Vub| from the sum rule for semileptonic B decay
A model-independent determination of |Vub| can be obtained exploiting the sum rule for inclusive charmless semileptonic B-meson decays. The sum rule is derived on the basis of light-cone expansion and beauty quantum number conservation. The sum rule does not receive any perturbative QCD correction. In this determination of |Vub|, there is no perturbative QCD uncertainty, while the dominant hadr...
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15 صفحه اولA Model Independent Determination of |v Ub |
It is shown that measuring the lepton invariant mass spectrum in inclusive semileptonic B̄ → Xulν̄ decay yields a model independent determination of |Vub|. Unlike the lepton energy and hadronic invariant mass spectra, nonperturbative effects are only important in the resonance region, and play a parametrically suppressed role when dΓ/dq2 is integrated over q2 > (mB −mD) 2, which is required to el...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2000
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(00)00318-x