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, $$\chi $$ χ . Our analysis matches a model generating the lepton flavor-violating interaction $$\bar{\ell }_i\ell _j\chi $$ ℓ ¯ i ℓ j χ at tree level with an effective field...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2024-12-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13665-x |
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| Summary: | Abstract We present an analysis of the lepton-flavor violating decay of the Higgs boson mediated by an ultralight gauge boson, $$\chi $$ χ . Our analysis matches a model generating the lepton flavor-violating interaction $$\bar{\ell }_i\ell _j\chi $$ ℓ ¯ i ℓ j χ at tree level with an effective field theory, safeguarding a physical massless $$\chi $$ χ -boson limit of the observables. By utilizing the upper bounds on $$H\rightarrow \ell _i {\bar{\ell }}_j$$ H → ℓ i ℓ ¯ j decays from CMS and ATLAS Collaborations, we establish an indirect upper limit on the nonstandard decay $$H\rightarrow \ell _i {\bar{\ell }}_j\chi $$ H → ℓ i ℓ ¯ j χ . 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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| ISSN: | 1434-6052 |