Lepton Flavor-Violating Higgs Decays Mediated by Ultralight Gauge Boson
Abstract
We present an analysis of the lepton-flavor violating decay of the Higgs boson mediated by an ultralight gauge boson, . Our analysis matches a model generating the lepton flavor-violating interaction ij at tree level with an effective field theory, safeguarding a physical massless -boson limit of the observables. By utilizing the upper bounds on Hi j decays from CMS and ATLAS Collaborations, we establish an indirect upper limit on the nonstandard decay Hi j. 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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