1995/01/01 by UKQCD Collaboration, Hoa Dung Ha Duong, D. R. Burford +9 · 5 citations
Mathematics · Physics and Astronomy · #Bar (unit) #Consistency (knowledge bases) #Discrete mathematics #Geometry #High-Energy Particle Collisions Research #Internal consistency #Lattice (music) #Mathematics #Nuclear physics research studies #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Pi #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scale (ratio) #Statistics #hep-lat #hep-ph
paper · pdf · doi:10.1016/0550-3213(95)00223-f
published as Nucl.Phys.B447:425-440,1995 · 13 pages, uuencoded compressed postscript file (including five figures). Also available from http://wwwhep.phys.soton.ac.uk/hepwww/papers/shep9509/
openalex publication_date 1995/01/01 · arxiv created 1995/03/02 · arxiv updated 2010/11/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We present a unified method for analysing form factors in B --> pi l () over bar nu(l) and B --> K*gamma decays. The analysis provides consistency checks on the q(2) and 1/M extrapolations necessary to obtain the physical decay rates. For the first time the q(2) dependence of the form factors is obtained at the B scale. In the B --> pi l () over bar nu(l) case, we show that pole fits to f(+) may not be consistent with the q(2) behaviour of f(0), leading to a possible factor of two uncertainty in the decay rate and hence in the value of /V-ub/(2) deduced from it. For B --> K*gamma, from the combined analysis of form factors T-1 and T-2, we find the hadronisation ratio R(K)* of the exclusive B --> K*gamma to the inclusive b --> s gamma rates is of order 35% or 15% for constant and pole-type behaviour of T-2, respectively.