Higgs boson decay to charmonia via $c$-quark fragmentation

arXiv

2202.08273

Date

2022-02-16

Frontier

Energy Frontier (EF)

Topical groups

• EF1
• TF7

Submitted by

Yang Ma

Abstract

We calculate the decay branching fractions of the Higgs boson to $J/\psi$ and ${\eta }_c$ 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 $H\to J/\psi +\gamma$, which is dominated by the ${\gamma }^{\ast }$-$J/\psi$ mixing. We find that the decay branching fractions can be about $2\times {10}^{-5}$ for $H\to c\overline{c}+J/\psi$, and $6\times {10}^{-5}$ for $H\to c\overline{c}+{\eta }_c$. We comment on the perspective of searching for the Higgs boson to $J/\psi$ transition at the High-Luminosity LHC for testing the charm-quark Yukawa coupling.