1995/06/22 by UKQCD Collaboration, J. M. Flynn, J M Flynn +20 · 3 citations
Mathematics · Physics and Astronomy · #Algorithm #B meson #Computation #Electron #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Lattice field theory #Mathematics #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Quenched approximation #Semileptonic decay #hep-ph
paper · pdf · doi:10.1016/0550-3213(95)00595-1
published as Nucl.Phys. B461 (1996) 327-349 · 22 pages LaTeX-209 (dependent on settings in a4.sty), 23 PostScript figures included with epsf.sty. Complete PostScript file including figures available at http://wwwhep.phys.soton.ac.uk/hepwww/papers/shep9518/
arxiv created 1995/06/22 · openalex publication_date 1996/02/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present results of a lattice computation of the vector and axial-vector current matrix elements relevant for the semileptonic decay B0-bar -> rho+ l- nul-bar. The computations are performed in the quenched approximation of lattice QCD on a 243 x 48 lattice at beta = 6.2, using an O(a) improved fermionic action. Our principal result is for the differential decay rate, dGamma/dq2, for the decay B0-bar -> rho+ l- nul-bar in a region beyond the charm threshold, allowing a model-independent extraction of |Vub| from experimental measurements. Heavy quark symmetry relations between radiative and semileptonic decays of B-bar mesons into light vector mesons are also discussed.