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 coupling — Eugenia Celada^1,2, Tao Han³, Wolfgang Kilian⁴, •Nils Kreher⁴, Yang Ma⁵, Fabio Maltoni^1,5,6, Davide Pagani⁵, Jürgen Reuter⁷, Tobias Striegl⁴, and Keping Xie^3,8 — ¹Università 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