  We present a search for anomalous production of heavy-flavor quark jets in
association with a W boson at the Fermilab Tevatron ppbar Collider. This search
is conducted through an examination of the exclusive jet spectrum of W+jets
final states in which the heavy-flavor quark content has been enhanced by
requiring at least one tagged jet in an event. Jets are tagged by the combined
use of two algorithms, one based on semileptonic decays of b/c hadrons, and the
other on their lifetimes. We compare data in e+jets (164 pb-1) and mu+jets (145
pb-1) channels, collected with the D0 detector at sqrt{s}=1.96 TeV, to
expectations from the standard model, and set upper limits on anomalous
production of such events.
