Semi-leptonic decays of heavy mesons and the Isgur–Wise function in quenched lattice QCD

2002/02/28 by UKQCD Collaboration, Graham Douglas, K. C. Bowler +7 · 25 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quenched approximation #hep-lat

paper · pdf · doi:10.1016/s0550-3213(02)00462-5

published in Nuclear Physics B 637(1-3), 293-310 (Elsevier BV) · 21 pages, 10 figures

arxiv created 2002/02/28 · openalex publication_date 2002/08/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The form factors for the semi-leptonic B->D and B->D* decays are evaluated in quenched lattice QCD at two different values of the coupling, beta=6.0 and 6.2. The action and the operators are fully O(a) non-perturbatively improved. The slope of the Isgur-Wise function is evaluated, and found to be rho²=0.83⁺¹⁵⁺²⁴_-11-1 (quoted errors are statistical and systematic respectively). Ratios of form factors are evaluated and compared to experimental determinations.

Citations

• Semi-leptonic decays of B-mesons
• Lattice QCD calculation ofB¯→Dlν¯decay form factors at zero recoil
• Computers and the Theory of Statistics: Thinking the Unthinkable
• Orderaimproved renormalization constants
• Lattice QCD analysis of the strangeness magnetic moment of the nucleon
• Non-perturbative quark mass renormalization in quenched lattice QCD
• Quenched QCD withO(a)<mml:mn/>improvement: The spectrum of light hadrons
• Some new results in O(a) improved lattice QCD