Fig. 15.

Event categorization as a function of the output of the MV1c $b$-tagging algorithm for the two signal jets. The bin boundaries correspond to the operating points (MV1c(jet) OP) giving $b$-tagging efficiencies of 100, 80, 70, and 50 %; i.e., the $b$-jet purity increases from left (bottom) to right (top). The event categories are labelled VL, L, M, T, and VT according to the definitions in the text, and the different colours correspond to events with 0, 1, and 2 identified $b$-jets