Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 74: Experimentelle Methoden II

T 74.5: Talk

Wednesday, March 2, 2016, 17:45–18:00, VMP8 SR 105

B-tagging in CMS at 13 TeV — Ivan Marchesin, Alexander Schmidt, and •Svenja Schumann — Universität Hamburg

At the LHC the CMS experiment investigates high energy p-p-collisions to study the Standard Model (SM) of particles physics and to search for physics beyond the Standard Model (BSM). The collisions of protons often result in processes with b quarks which hadronize in jets. The identification of these jets from b quarks is very important for BSM searches and SM measurements because it can reduce the background a lot. Based on the characteristics of b hadrons, such as long life time or presence of soft leptons, CMS has various algorithms to select jets form b quarks. The tracking system, the lepton identification and the segmented calorimeters of the CMS detector are excellent to identify jets from b quarks (b-tagging). The efficiencies of the different algorithms and the scale factors are measured with the 13 TeV data which will be shown in this talk. The commissioning of b-tagging in boosted topologies at 13 TeV will also be presented.