SU(3) corrections to B → Dl overlineν form factors at O( {1}/{M})
Abstract
We compute the O( {1}/{M}, m _{s}) heavy quark and SU(3) corrections to overlineB_{s} → D _{s}eν form factors. In the limit of vanishing light quark mass, overlineB_{s} → D _{s}eν form factors are given in terms of the the overlineB → Deν form factors, the leading order chiral parameter g, and two O( {1}/{M}) chiral parameters g_{1} and g_{2}. All the chiral parameters can be extracted, in principle, from other heavy meson decays. Analytic counterterms proportional to the strange quark mass are presented for completeness, but no predictive power remains when they are included. Anomalously large loop corrections warn of poor convergence of the heavy quark chiral symmetry expansion for these processes. This suggests that naive extrapolations of overlineB → D form factors relying on heavy quark and chiral symmetries, as often used in monte carlo simulations of lattice QCD, may incur large errors.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1995
 DOI:
 10.1016/05503213(95)00339T
 arXiv:
 arXiv:hepph/9502311
 Bibcode:
 1995NuPhB.451..177B
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Lattice
 EPrint:
 uuencoded, 24 pages, 6 eps figures, uses lanlmac/harvmac (suggest `b' size) and epsf.tex (if you want autoinsertion of figs).