View article

The success of the physics programme of the CMS experiment at the CERN LHC requires the particles created in the LHC collisions to be reconstructed and identified as accurately as possible. With the exception of the top quark, quarks and gluons produced in pp collisions develop a parton shower and eventually hadronize giving rise to jets of collimated particles observed in the CMS detector. Heavy-flavour jet identification techniques exploit the properties of the hadrons in the jet to discriminate between jets originating from b or c quarks (heavy-flavour jets) and those originating from light-flavour quarks or gluons (light-flavour jets). The CMS Collaboration presented in ref.[1] a set of b jet identification techniques used in physics analyses performed on LHC Run 1 pp collision data, collected in 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. This paper presents a comprehensive summary of the newly …