New-physics signatures via CP violation in η(′) → π0μ+μ− and η′ → ημ+μ− decays

A bstract In this work we investigate the prospect of observing new-physics signatures via CP violation in η (′) → π 0 μ + μ − and η ′ → ημ + μ − decays at the REDTOP experiment. We make use of the SMEFT to parametrise the new-physics CP -violating effects and find that the projected REDTOP statisti...

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Bibliographic Details
Published in:The journal of high energy physics 2022-05, Vol.2022 (5), p.147, Article 147
Main Authors: Escribano, Rafel, Royo, Emilio, Sanchez-Puertas, Pablo
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
CP violation
Elementary Particles
High energy physics
Matter & antimatter
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Signatures
String Theory
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Summary:A bstract In this work we investigate the prospect of observing new-physics signatures via CP violation in η (′) → π 0 μ + μ − and η ′ → ημ + μ − decays at the REDTOP experiment. We make use of the SMEFT to parametrise the new-physics CP -violating effects and find that the projected REDTOP statistics are not competitive with respect to nEDM experiments. This reasserts the η → μ + μ − process as the most promising channel to find CP -violation at this experimental facility.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP05(2022)147