Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 33: Search for new particles II

T 33.5: Talk

Tuesday, March 31, 2020, 18:00–18:15, H-HS XVI

Leptoquark single production in a τ charm final state at the ATLAS detector — •Patrick Bauer for the ATLAS collaboration — Physikalisches Institut Bonn

At B-factories, anomalies were observed in decays of the B-hadrons into D^(*) and K^(*), which are consistent with the hypothesis of contributions from Leptoquarks in the high GeV to low TeV range. Therefore, the direct search for leptoquarks (LQ) got once again in focus at high energy collider experiments. So far most searches aimed at the pair-production via strong interaction, as it is enables a almost model independent approach and is for LQ-masses below 1 TeV expected to be dominating.
However for LQ masses well above 1 TeV the single production mode becomes more relevant. The analysis presented this talk, offers the most direct approach for a search of LQ signature related to the B → D^(*) τ ν anomaly, as it incorporates essentially the same couplings. Furthermore the process to be investigated could be mediated by a U₁-vector LQ, which is presently widely discussed among theorists, as preferred solution to B-anomalies.It could explain the two observed anomalies within one model. The talk will motivate the analysis and present first monte-carlo studies.