We investigate transition form factors of B meson decays into a scalar
glueball in the light-cone formalism. Compared with form factors of B to
ordinary scalar mesons, the B-to-glueball form factors have the same power in
the expansion of 1/mB. Taking into account the leading twist light-cone
distribution amplitude, we find that they are numerically smaller than those
form factors of B to ordinary scalar mesons. Semileptonic B→Glνˉ,
B→Gl+l− and Bs→Gl+l− decays are subsequently investigated. We
also analyze the production rates of scalar mesons in semileptonic B decays
in the presence of mixing between scalar qˉq and glueball states. The
glueball production in Bc meson decays is also investigated and the LHCb
experiment may discover this channel. The sizable branching fraction in Bc→(π+π−)l−νˉ, Bc→(K+K−)l−νˉ or Bc→(π+π−π+π−)l−νˉ could be a clear signal for a scalar glueball
state.Comment: 17 pages, 3 figure, revtex