A Model Independent Determination of |V_{ub}|

Abstract

It is shown that measuring the lepton invariant mass spectrum in inclusive semileptonic B -> X_u l nu decay yields a model independent determination of |V_{ub}|. 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/dq^2 is integrated over q^2 > (m_B-m_D)^2, which is required to eliminate the charm background. Perturbative and nonperturbative corrections are presented to order α_s^2β_0 and Λ_{QCD}^2/m_b^2, and the Λ_{QCD}^3/m_b^3 corrections are used to estimate the uncertainty in our results. The utility of the B -> X_s l^+ l^- decay rate above the ψ(2S) resonance is discussed.

11 pages; some references added, version to appear in PLB

References in corpus (1)

• Phenomenology of V_ub from Ratios of Inclusive B Decay Rates

Cited by in corpus (40)

• Summing Sudakov logarithms in B -> X_s + gamma in effective field theory
• Treating the b quark distribution function with reliable uncertainties
• Theory of Charmless Inclusive B Decays and the Extraction of V_{ub}
• Inclusive spectra in charmless semileptonic B decays by Dressed Gluon Exponentiation
• Logarithmically Enhanced Corrections to the Decay Rate and Forward Backward Asymmetry in anti-B --> X(s) l+ l-
• $O({\alpha }_s^2)$ corrections to fully-differential top quark decays
• The Semileptonic Decays $B\to \pi l\nu$ and $D\to \pi l\nu$ from Lattice QCD
• Precision determination of |V_{ub}| from inclusive decays
• Deciphering top flavor violation at the LHC with B factories
• Analytic calculation of two-loop QCD corrections to b\to s\ell^+\ell^- in the high q^2 region
• New Physics at a Super Flavor Factory
• Challenges in Semileptonic B Decays
• Non-factorization effects in heavy mesons and determination of |V_{ub}| from inclusive semileptonic B decays
• A Vademecum on Quark-Hadron Duality
• Light-cone distribution functions for B decays at subleading order in 1/mb
• CP violation and the CKM matrix
• Subleading shape functions in B -> X_u l νand the determination of |Vub|
• Precise predictions for B -> Xs l+ l- in the large q^2 region
• Precise predictions for B -> Xc tau nu decay distributions
• On the $O({\alpha }_s^2)$ corrections to $b\to X_{u}e\bar{\nu }$ inclusive decays
• Semileptonic b --> u decays: lepton invariant mass spectrum
• Full-Phase-Space Twist Expansion in Semileptonic and Radiative B-Meson Decays
• B Meson Decays
• Measurement of |V_{ub}/V_{cb}| (and |V_{ub}|) in Exclusive Nonleptonic Decays, \bar{B}^0 --> D_s^{(*)-}(π^+,ρ^+) and \bar{B}^0 --> D_s^{(*)-}D^{(*)+}
• Subleading shape function contributions to the hadronic invariant mass spectrum in B -> X_u l νdecay
• Perturbative corrections to the determination of Vub from the P+ spectrum in B->X_u l nu
• A new model-independent way of extracting |V_ub/V_cb|
• Improved Determination of |V_{ub}| from Inclusive Semileptonic B-Meson Decays
• Reducing theoretical uncertainties in mb and lambda1
• Complementary Observables for the Determination of |Vub| in Inclusive Semileptonic B Decays
• Determination of V_ub from semileptonic B decays
• Non-factorizable terms, heavy quark masses, and semileptonic decays of D and B mesons
• Two-Loop Renormalization of Heavy--Light Currents at Order 1/m_Q in the Heavy-Quark Expansion
• Master Integrals for double real radiation emission in heavy-to-light quark decay
• Determination of |Vub|
• Extraction of nonperturbative parameters for $D^{(\ast )}$ mesons from lattice data
• Exploring the $\tau$ polarization in $B\to X\tau \bar{\nu }$ along different axes
• Heavy Meson Physics: What have we learned in Twenty Years?
• On magnitudes of some CKM matrix elements
• Recent Progress in Heavy Quark Physics