SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 31: Theory Higgs, BMS
T 31.2: Vortrag
Dienstag, 21. März 2023, 17:15–17:30, HSZ/0201
Precision test of the muon-Higgs coupling at a high-energy muon collider — •Nils Kreher1, Tao Han2, Wolfgang Kilian1, Yang Ma2, Jürgen Reuter3, Tobias Striegl1, and Keping Xi2 — 1Department of Physics, University of Siegen, Walter-Flex-Straße 3, 57068 Siegen, Germany — 2Pittsburgh Particle Physics, Astrophysics, and Cosmology Center, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15206, U.S.A. — 3Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
I will present a sensitivity test of the muon-Yukawa sector at a high-energy muon collider. While in the Standard Model this sector is described by a single parameter, effects of new physics that is not aligned with the Standard Model Yukawa interactions may introduce a more sophisticated parameter dependence, which can be understood either in SMEFT or a HEFT frameworks. With the accidentally small value of the muon Yukawa coupling and its subtle role in the high-energy production of multiple (vector and Higgs) bosons, I will show that it is possible to measure the muon-Higgs coupling to an accuracy of ten percent for a 10 TeV muon collider and a few percent for a 30 TeV machine by utilizing the three boson production, potentially sensitive to a new physics scale about λ=10 ∼ 30 TeV. In addition I will discuss effects of an extended Higgs sector to the same processes in both frameworks.