Heidelberg 2022 – scientific programme

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T: Fachverband Teilchenphysik

T 63: Search for New Particles 4

T 63.7: Talk

Wednesday, March 23, 2022, 17:45–18:00, T-H22

Investigation of Collider Effects of Flavour Anomalies Using EFTs and Simplified Models — Philip Bechtle, Klaus Desch, Christian Grefe, and •Murillo Vellasco — Rheinische Friedrich-Wilhelms-Universität Bonn

The Standard Model of particle physics (SM) is undoubtedly one of the most successful scientific theories in history. Despite its overwhelming success, several tensions with its predictions have been discovered in recent years, including the measurements of the muon g-2 at Fermilab and rare B-decays at the LHC. The natural next step is to build even more powerful future colliders, but exactly which combination of future experiments is best to investigate further these hints is non-trivial.

The most challenging possibility is a scenario where the energy scale of New Physics is out of reach of direct discovery at future colliders. Therefore, our approach is to use the formalism of the Standard Model Effective Field Theory (SMEFT), performing scans over several operators which could perhaps explain the hints of experimental deviations from the SM. Kinematic observables of collider signatures can be directly affected by the presence of these operators, and the optimal combination of future experiments would be the one that optimizes the observation of these kinematic deviations. In this talk, we will discuss a possible strategy to choose the best combination of experiments given all current measurements in the electroweak and the flavour sectors. Ideally, any strategy for future colliders should aim for a "no-lose" scenario, analogous to the situation for the approval of the LHC.