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Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 71: Supersymmetry: Theory and searches

T 71.5: Vortrag

Donnerstag, 2. April 2020, 17:30–17:45, H-HS VI

Search for new physics in final states with hadronically decaying tau leptons in association with b-jets — •Ferdinand Krieter and Alexander Mann — Ludwig-Maximilians-Universität München

While the predictions given by the Standard Model (SM) of particle physics show an exceptionally good agreement with experimental data, there are still several questions left unanswered. A search for new physics involving final states with tau leptons, b-jets and missing transverse momentum is presented. Such signatures can emerge in multiple extensions of the SM, which try to provide solutions to some of the open questions. The search uses data of pp collision events at a center-of-mass energy of 13 TeV, recorded with the ATLAS detector from 2015 to 2018.

One proposed extension is given by Supersymmetry (SUSY), which predicts superpartners of known SM particles, whose spins differ by one half unit. In many SUSY models the mass of the top squark, the superpartner of the SM top quark, is expected to be low enough to not only be within the reach of the LHC but also to provide an elegant solution to the hierarchy problem.

Besides a search for top squark pair production, another SM extension, leptoquarks, is discussed in this talk. These hypothetical particles are potential candidates to explain the similarities between the quark and lepton sector of the SM as well as the anomalies observed in B-meson decays. Pair-produced leptoquarks of the third generation yield a final state that can be covered by this analysis as well.

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