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arXiv · 2406.17040

Lepton Flavor-Violating Higgs Decays Mediated by Ultralight Gauge Boson

Marcela Marín·R. Gaitán·R. Martinez
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Abstract

We present an analysis of the lepton-flavor violating decay of the Higgs boson mediated by an ultralight gauge boson, $\chi$. Our analysis matches a model generating the lepton flavor-violating interaction $\bar{\ell}_i\ell_j\chi$ at tree level with an effective field theory, safeguarding a physical massless $\chi$-boson limit of the observables. By utilizing the upper bounds on $H\to\ell_i \bar\ell_j$ decays from CMS and ATLAS Collaborations, we establish an indirect upper limit on the nonstandard decay $H\to\ell_i \bar\ell_j\chi$. The analysis encompasses various observables such as the lepton energy spectrum, Dalitz plot distribution, and Lepton Charge and Forward-Backward Asymmetries.

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Marcela Marín, R. Gaitán, R. Martinez. 2024-06-24. Lepton Flavor-Violating Higgs Decays Mediated by Ultralight Gauge Boson. https://arxiv.org/abs/2406.17040

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