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Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 2: Higgs-Boson (Zerfall in Tau-Leptonen) I

T 2.1: Vortrag

Montag, 29. Februar 2016, 11:00–11:15, VMP5 HS A

Measurement of the Z →ττ cross-section at 13 TeV with the CMS experiment — •Fabio Colombo, Rene Caspart, Raphael Friese, Andrew Gilbert, Thomas Müller, Günter Quast, and Roger Wolf — Institut für Experimentelle Kernphysik (IEKP), KIT

With the restart of operation in the summer of 2015, the Large Hadron Collider, LHC, has provided proton-proton collisions with the unprecedented center of mass energy of 13 TeV. A precise understanding of the detector and a reliable reconstruction of all physics objects under these new running conditions are mandatory for all LHC experiments. For complex objects like tau leptons, whose reconstruction relies on different sub-detectors, the decay of Z bosons can be used as a standard candle. In the talk, the measurement of the Z→ττ cross-section with the data collected by the CMS experiment during the 2015 run period will be presented. Besides technically proving the performance of the reconstruction algorithms, it will pave the way for future short and long term measurements targeting at the study of the properties of the discovered Higgs boson in the decay mode with two tau leptons in the final state or at searches for additional resonances in this final state pointing to new physics.

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