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T: Fachverband Teilchenphysik
T 68: Higgs Physics VIII (CP)
T 68.7: Vortrag
Donnerstag, 3. April 2025, 17:45–18:00, ZHG105
Probing CP violation in the top-Yukawa coupling at future colliders — •Vincent Riechers1, Marco Menen1,2, Elina Fuchs1,2,3, and Henning Bahl4 — 1Institut für Theoretische Physik, Leibniz Universität Hannover — 2Physikalisch-Technische Bundesanstalt (PTB), Braunschweig — 3Deutsches Elektronen-Synchrotron DESY, Hamburg — 4Institut für Theoretische Physik, Universität Heidelberg
The CP-violating effects within the Standard Model (SM) are not sufficient to explain the observed baryon asymmetry of the Universe. Additional CP violation beyond the SM could be present in the Higgs boson couplings to other SM particles. The top-Yukawa coupling is of particular interest, as it is both the largest and most accessible Higgs-fermion interaction at the LHC and is expected to show the largest CP-violating effects in many BSM models. The goal of this study is to evaluate the constraints that future colliders could impose on the CP structure of the Higgs-top coupling. While a future e+e− collider benefits from a very clean background, which allows precise measurements of final states with many quarks, a proton-proton collider like the FCC-hh offers a high luminosity and center-of-mass energy. We use a machine learning approach to distinguish between CP-even and CP-odd events, enhancing sensitivity to potential deviations from the SM.
Keywords: CP violation; Future Colliders; Higgs; Yukawa; Top