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New-physics searches in $C\!P$-violating $η$ muonic decays (1909.07491v1)
Published 16 Sep 2019 in hep-ph
Abstract: In this work we investigate the possibility to observe $C!P$-violation in $\eta$ decays containing muons at the proposed REDTOP experiment. Employing the SMEFT to parametrize the new-physics $C!P$-violating effects, we find that a single operator exists for which is possible to observe $C!P$-violation at REDTOP in $\eta\to\mu+\mu-$ decays, while evading bounds from the neutron electric dipole moment and $D-\to\mu\bar{\nu}$
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