Abstract
We calculate the decay branching fractions of the Higgs boson to J/ψ and ηc via the charm-quark fragmentation mechanism for the color-singlet and color-octet states in the framework of non-relativistic QCD. The decay rates are governed by the charm-quark Yukawa coupling, unlike the decay H → J/ψ + γ, which is dominated by the γ∗-J/ψ mixing. We find that the decay branching fractions can be about 2×10−5 for \( H\to c\overline{c}+J/\psi \), and 6 × 10−5 for \( H\to c\overline{c}+{\eta}_c \). We comment on the perspective of searching for the Higgs boson to J/ψ transition at the High-Luminosity LHC for testing the charm-quark Yukawa coupling.
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Han, T., Leibovich, A.K., Ma, Y. et al. Higgs boson decay to charmonia via c-quark fragmentation. J. High Energ. Phys. 2022, 73 (2022). https://doi.org/10.1007/JHEP08(2022)073
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DOI: https://doi.org/10.1007/JHEP08(2022)073