We present a high statistics lattice calculation of the B--meson binding
energy Λ of the heavy--quark inside the pseudoscalar
B--meson. Our numerical results have been obtained from several independent
numerical simulations at β=6.0, 6.2 and 6.4, and using, for the meson
correlators, the results obtained by the APE group at the same values of
β. Our best estimate, obtained by combining results at different values
of β, is Λ=180−20+30 MeV. For the
MS running mass, we obtain
mb(mb)=4.15±0.05±0.20 GeV, in reasonable
agreement with previous determinations. The systematic error is the truncation
of the perturbative series in the matching condition of the relevant operator
of the Heavy Quark Effective Theory.Comment: Latex, 13 pages, 1 figure appended in uuencoded gzip.tar.fil