We discuss semileptonic B decays of the form B -> J/Psi e nu X as possible
probes of intrinsic charm. We calculate the leading order perturbative
contribution to the process B- -> J/Psi e- nu_e X and find it to be
unobservably small, with a branching ratio ~ 10^-10. We propose a modified
spectator model to estimate the intrinsic charm contribution and find that it
can be significantly larger, with a branching ratio for B -> (c cbar) e- nu_e X
as large as 5 X 10^-7. We show that the process could be observed at these
levels by CDF assuming a Run II integrated luminosity of 15 fb^-1, making this
a useful reaction to probe the idea of intrinsic charm.Comment: 25 pages, LaTeX, 7 figures, uses epsf.sty. Version substantially
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