https://doi.org/10.1140/epjc/s10052-024-12892-6
Regular Article - Theoretical Physics
Z’ boson mass reach and model discrimination at muon colliders
1
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
2
Department of Physics, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Street, 01601, Kyiv, Ukraine
3
Fundamentale Physik für Metrologie FPM, Physikalisch-Technische Bundesanstalt PTB, Bundesallee 100, 38116, Braunschweig, Germany
4
Instituut-Lorentz, Leiden University, Niels Bohrweg 2, 2333 CA, Leiden, The Netherlands
5
Faculty of Physics, University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland
Received:
4
March
2024
Accepted:
8
May
2024
Published online:
5
June
2024
We study the discrimination power of future multi-TeV muon colliders for a large set of models with extended gauge symmetries and additional neutral gauge bosons (“
-models”). Our study is carried out using a 
-analysis of leptonic observables of s-channel scattering in effective -models. We make use of angular and chiral asymmetries induced in such models to find the discovery reach of a given muon collider setup in terms of the mass and to discriminate between the different scenarios. In this context, we discuss how polarized beams – should they become available at muon colliders – or polarization measurements can help in the discrimination. Our results show that typical muon collider setups which are currently under consideration can give a significantly higher reach compared to existing bounds and projections for high-luminosity LHC.
© The Author(s) 2024
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Funded by SCOAP3.
