Identification of signal events in a search for $H\to b\bar b$ produced in association with single top quarks

The CMS collaboration has performed a search for an associated production of Higgs bosons and single top quarks in the $H\to b\bar b$ decay channel.The measurement is challenged by a complex multijet final state and an overwhelming background from top-quark pair production.These proceedings address a particular aspect of the search and describe the procedure deployed to discriminate the signal process from backgrounds.