  We introduce a novel anomaly search method based on (i) jet tagging to select
interesting events, which are less likely to be produced by background
processes; (ii) comparison of the untagged and tagged samples to single out
features (such as bumps produced by the decay of new particles) in the latter.
We demonstrate the usefulness of this method by applying it to a final state
with two massive boosted jets: for the new physics benchmarks considered, the
signal significance increases an order of magnitude, up to a factor of 40. We
compare to other anomaly detection methods in the literature and discuss
possible generalisations.
