Performance of quark/gluon discrimination in 13 TeV data

The 2015 proton collision data at 13 TeV and corresponding simulated samples are used to produce an updated quark/gluon jet discriminator and to validate its performances making use of dimuon plus jet and dijet selected events. The three input discriminating jet observables are the same as those used for the latest validated Run 1 discriminator, as well as the likelihood method to combine them. A new method is employed to derive data-driven corrections to the simulated distributions, and access corresponding systematic uncertainties.