Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 87: Eingeladene Vorträge III

T 87.5: Eingeladener Vortrag

Donnerstag, 3. März 2016, 15:45–16:15, VMP4 Audimax 1

The Top Quark and the Higgs Boson: Vital Actors at LHC — •Johannes Hauk — Deutsches Elektronen-Synchrotron

The two heaviest elementary particles known so far, the top quark and the Higgs boson, were discovered relatively late, long time after their prediction by the Standard Model (SM). This is due to the high masses which could not be predicted directly, but this makes them especially interesting for validating the SM or revealing signs of new physics. The high collision energy of protons at LHC leads to plenty of top quarks, mainly via pair production (tt), and also numerous Higgs bosons.

Many properties of the top quark are meanwhile studied with high precision, and also the Higgs boson is undergoing scrutiny – so far everything in agreement with the SM. One important test is to measure the interplay between these two particles. The only possibility to measure directly the coupling is the Higgs production in association with top quarks, and especially tt. This requires a good understanding of the overwhelming background processes, namely tt production in association with other particles. In this talk, measurements from the CMS experiment will be discussed concerning both, understanding the background processes as well as targeting the detection of associated tt and Higgs boson production.