Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 97: Future colliders

T 97.4: Talk

Thursday, March 7, 2024, 16:45–17:00, Geb. 30.34: LTI

Towards a No-Lose Theorem for New Physics at Future Colliders — Philip Bechtle, Klaus Desch, Christian Grefe, and •Murillo Vellasco — Rheinische Friedrich-Wilhelms-Universität Bonn, Germany

For over half a century, the Standard Model of particle physics (SM) has stood as the current best description of matter and its interactions, despite recent experimental results, such as the muon g−2 and the B-anomalies, providing hints at an underlying, more fundamental theory. Whereas the proposal of the Large Hadron Collider was supported by the “No-Lose Theorem”, which guaranteed the discovery of either the Higgs or some other New Physics (NP) process, no such analogous result can be stated at the moment for potential future collider experiments. This is due to the UV-complete nature of the Standard Model including the Higgs Boson.

In this talk, I will outline the steps towards a potential new “No-Lose Theorem” for future colliders, based on a parametrization of recent experimental deviations using the reasonably model-independent framework of the Standard Model Effective Field Theory (SMEFT). Under the assumption that these deviations are true NP effects, they can be parametrized using SMEFT in order to study their measurability in future experiments, since SMEFT operators can directly affect kinematic distributions and precision observables. The results of these studies could eventually point to a set of optimal future experiments, which, under these assumptions, are guaranteed to lead to fundamental discoveries.

Keywords: no-lose theorem; SMEFT; future colliders; effective field theory; new physics