Inclusive semileptonic B decays and the determination of |V_ub|

Abstract

We study the triple differential distribution of B-> Xu l nu, consistently including all perturbative and non-perturbative effects through O(alphas^2 beta_0) and O(1/mb^3). The Fermi motion is parameterized in terms of a single light-cone function for each structure function and for any value of q^2, accounting for all subleading effects. We discuss the problems and uncertainties related to the high-q^2 tail and to Weak Annihilation effects. We work in the kinetic scheme, a framework characterized by a Wilsonian treatment with a hard cutoff mu ~ 1GeV. Our method is illustrated with the extraction of |V_ub| from some of the latest experimental data, providing a detailed estimate of the theoretical uncertainty.

35 pages, 15 figures; v2: improved presentation, updated exp inputs, version published in JHEP

References in corpus (5)

• Semi-Inclusive B Decays and a Model for Soft-Gluon Effects
• Enhanced Non-local Power Corrections to the B->X_s+gamma Decay Rate
• |Vub| from exclusive semileptonic B to pi decays revisited
• Running-coupling effects in the triple-differential charmless semileptonic decay width
• Inclusive B decays from resummed perturbation theory

Cited by in corpus (10)

• Treating the b quark distribution function with reliable uncertainties
• Left-right mixing on leptonic and semileptonic $b\to u$ decays
• Inclusive Measure of |V_ub| with the Analytic Coupling Model
• Normalizing inclusive rare B decays
• Role of "Intrinsic Charm" in Semi-Leptonic B-Meson Decays
• Large |Vub|: A challenge for the Minimal Flavour Violating MSSM
• A Review of the Magnitudes of the CKM Matrix Elements
• Theory of Semileptonic Charm Decays
• On the determination of |V_{ub}| from inclusive semileptonic B decays
• Semileptonic B decays and the inclusive determination of |V(ub)|