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Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 97: Future colliders

T 97.5: Talk

Thursday, March 7, 2024, 17:00–17:15, Geb. 30.34: LTI

Multiple boson production at high-energy muon colliders to probe the Higgs-muon couplingEugenia Celada1,2, Tao Han3, Wolfgang Kilian4, •Nils Kreher4, Yang Ma5, Fabio Maltoni1,5,6, Davide Pagani5, Jürgen Reuter7, Tobias Striegl4, and Keping Xie3,81Università di Bologna, Bologna, Italy — 2University of Manchester, Manchester , United Kingdom — 3University of Pittsburgh, Pittsburgh, USA — 4University of Siegen, Siegen, Germany — 5INFN, Sezione di Bologna, Bologna, Italy — 6Université catholique de Louvain, Louvain-la-Neuve, Belgium — 7Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 8Michigan State University, East Lansing, USA

I will present a phenomenological study of the sensitivity of the muon-Yukawa sector at a high-energy muon collider. While this sector is described by a single parameter in the Standard Model, effects of new physics that are not aligned with the Yukawa interactions of the Standard Model can introduce a more sophisticated parameter dependence that can be understood in the framework of either SMEFT or HEFT. Exploiting the coincident small value of the muon-Yukawa coupling and its subtle role in the high-energy production of multiple bosons (vector and Higgs bosons), I will discuss the possibility of constraining the muon-Higgs couplings through a combined analysis of the production cross sections of multiple bosons at both 3-TeV and 10-TeV muon collider levels. Furthermore, I will discuss the implications of an extended Higgs sector on the same processes in both frameworks.

Keywords: muon-Yukawa; EFT; muon collider

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