| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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Dark Contributions to $h\to \mu^+\mu^-$ in the Presence of a $\mu$-Flavored Vector-Like Lepton |
| Bibhabasu De* |
| Department of Physics, ICFAI University Tripura, Kamalghat-799210, India |
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| Cite this article: |
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Bibhabasu De 2023 Chin. Phys. Lett. 40 049501 |
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Abstract A simple extension of the standard model (SM) with a $\mu$-flavored vector-like lepton (VLL) doublet and a real singlet scalar can have an interesting implication to the $h \to\mu^+\mu^-$ decay while offering the simplest possible explanation for the dark matter (DM) phenomenology. Assuming the real singlet scalar to be a viable DM candidate, it has been shown that the muon Yukawa coupling can have a negative contribution at the one-loop order if the $2^{\rm nd}$ generation SM leptons are allowed to couple with the VLL doublet. The stringent direct detection bounds corresponding to a real singlet scalar DM can easily be relaxed if the SM quark sector was augmented with a dimension-6 operator at some new physics (NP) scale $\varLambda_{\scriptscriptstyle{\rm NP}}$. Thus, this model presents a significant phenomenological study where the muon Yukawa coupling can be corrected within a real singlet scalar DM framework. The considered parameter space can be tested/constrained through the high luminosity run of the LHC (HL-LHC) and future direct detection experiments.
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Received: 30 January 2023
Published: 29 March 2023
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| PACS: |
95.85.Ry
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(Neutrino, muon, pion, and other elementary particles; cosmic rays)
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95.30.Cq
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(Elementary particle processes)
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14.80.Ec
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(Other neutral Higgs bosons)
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12.60.-i
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(Models beyond the standard model)
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