Semileptonic B Decays with Nf=2+1 Dynamical Quarks

Abstract

Semileptonic, B --> pi l,nu, decays are studied on the MILC dynamical configurations using NRQCD heavy and Asqtad light quarks. We work with light valence quark masses ranging between m_s and m_s/8. Preliminary simple linear chiral extrapolations have been carried out for form factors f_para and f_perp at fixed E_pi. The chirally extrapolated results for the form factors f_+(q^2) and f_0(q^2) are then fit to the Becirevic-Kaidalov (BK) ansatz. Preliminary estimates of the CKM matrix element |V_{ub}| are presented based on the recently published branching fractions for B exclusive semileptonic decays by the CLEO collaboration.

3 pages, 1 figure. Contribution to Lattice'04 (heavy quarks)

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Cited by in corpus (21)

• The Upsilon spectrum and m_b from full lattice QCD
• B Meson Semileptonic Form Factors from Unquenched Lattice QCD
• Comment on form factor shape and extraction of |V_ub| from B --> pi l nu
• Mass of the B_c Meson in Three-Flavor Lattice QCD
• Deciphering top flavor violation at the LHC with B factories
• |V_ub| and Constraints on the Leading-Twist Pion Distribution Amplitude from B->pi l nu
• A Numerical Study of Partially Twisted Boundary Conditions
• CP violation and the CKM matrix
• Full determination of the CKM matrix using recent results from lattice QCD
• Heavy-to-light meson form factors at large recoil
• Semileptonic $B\to \pi$ Decays from an Omnès Improved Nonrelativistic Constituent Quark Model
• Moving NRQCD for heavy-to-light form factors on the lattice
• Full CKM matrix with lattice QCD
• Precision study of B^* Bπcoupling for the static heavy-light meson
• Heavy flavor physics from lattice QCD
• CP-violation and unitarity triangle test of the Standard Model
• Lattice QCD and Flavor Physics
• Taming the end-point singularities in heavy-to-light decays
• Semileptonic B Decays and Determination of |Vub|
• B Decays on the Lattice and Results for Phenomenology
• Non-leptonic B-decays in and beyond QCD Factorisation