CP-violating new physics in η decays: implications from the SMEFT
ORAL
Abstract
Forbidden (or highly-suppressed) processes, such as CP violating signatures in the flavor-neutral sector, offer unique opportunities to search for physics beyond the standard model.
A natural candidate to drive such searches are the η and η' mesons, especially with the envisaged eta factories.
Notwithstanding, such processes are expected to be highly-constrained by CP-violating observables such as EDMs, and theoretical calculations estimating the required statistics to overcome them are necessary.
In this work, we derive bounds using the SMEFT to parametrize new physics and focus on different leptonic and semileptonic eta decays. Among these, polarization signatures in eta --> mu+mu- decays are a viable candidate.
A natural candidate to drive such searches are the η and η' mesons, especially with the envisaged eta factories.
Notwithstanding, such processes are expected to be highly-constrained by CP-violating observables such as EDMs, and theoretical calculations estimating the required statistics to overcome them are necessary.
In this work, we derive bounds using the SMEFT to parametrize new physics and focus on different leptonic and semileptonic eta decays. Among these, polarization signatures in eta --> mu+mu- decays are a viable candidate.
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Publication: P. Sanchez-Puertas, CP-violation in eta decays, JHEP 01 (2019) 031;<br>R. Escribano, E. Royo, P. Sanchez-Puertas, CP violation in eta -> pi0 mu+mu- decays [...], JHEP 05 (2022) 147
Presenters
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Pablo Sanchez-Puertas
IFAE
Authors
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Pablo Sanchez-Puertas
IFAE