Measurements of W and Z boson production in association with heavy flavor at ATLAS

Standard Model measurements involving the production of Z and W bosons in association with jets is a relevant part of the ATLAS physics program. The measurement of integrated and differential production cross sections constitutes a powerful tool to test our understanding of the Monte Carlo generators and of the hadronization processes, as well as a way to explore the initial state of the proton-proton interaction. In this presentation, a recent ATLAS measurement of the associated production of the Z-boson with a high-T (boosted) jet is described, both flavor-inclusive and with -quark tagging of the jet. The measurement is performed using proton-proton collisions at √ = 13 TeV at the LHC with an integrated luminosity of 36 fb−1 acquired by the ATLAS detector during Run-2. A discussion of the results and their complementarity with a previous measurement of the associated production of the -boson with -tagged jets in the resolved regime is given. Particular emphasis is devoted to the discussion of the modeling issues affecting the flavor-inclusive selection and of the ability of the experimental results obtained with the -tag selection to discriminate among models implementing different flavor-number schemes to describe the initial state of the interaction.Standard Model measurements involving the production of and bosons in association with jets is an important part of the ATLAS physics program at the LHC. The measurement of integrated and differential production cross sections constitutes a powerful tool to test our understanding of the Monte Carlo generators and of the hadronization processes, as well as a way to explore the initial state of the proton-proton interaction. In these proceedings, a recent ATLAS measurement of the associated production of the -boson with a high-T (boosted) jet is described, both flavor inclusive and with -quark tagging of the jet. The measurement is performed using proton-proton collisions at √ = 13 TeV at the LHC with an integrated luminosity of 36 fb−1 acquired by the ATLAS detector during Run-2. A discussion of the results and their complementarity with a previous measurement of the associated production of the -boson with -tagged jets in the resolved regime is given. Particular emphasis is devoted to the discussion of the modeling issues affecting the flavor-inclusive selection and of the ability of the experimental results obtained with the -tag selection to discriminate among models implementing different flavor-number schemes to describe the initial state of the interaction