Next-to-leading order QCD corrections to Higgs boson decay to quarkonium plus a photon

Abstract

In this paper, we investigate the decay of Higgs boson to $J/\psi ({\rm Y})$ plus a photon based on NRQCD factorization. For the direct process, we calculate the decay width up to QCD NLO. We find that the decay width for process $H\to J/\psi ({\rm Y})+\gamma$ direct production at the LO is significantly reduced by the NLO QCD corrections. For the indirect process, we calculate the $H\to {\gamma }^{\ast }\gamma$ with virtual $\gamma$ substantially decaying to $J/\psi ({\rm Y})$, including all the SM Feynman diagrams. The decay width of indirect production is much larger than the direct decay width. Since it is very clean in experiment, the $H\to J/\psi ({\rm Y})+\gamma$ decay could be observable at a 14 TeV LHC and it also offers a new way to probe the Yukawa coupling and New Physics at the LHC.

10 pages, 5 figures

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• Higgs boson decays to $B_c$ meson in the fragmentation-function approach
• QCD one-loop correction to Higgs boson decay into quarkonium-pair
• $J/\psi$ associated production with a bottom quark pair from the Higgs boson decay in next-to-leading order QCD
• Searches for exclusive Higgs boson decays into $D^{\ast }\gamma$ and $Z$ boson decays into $D^0\gamma$ and $K_s^0\gamma$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• $h\to {\rm Y}\gamma$ Decay: Smoking Gun Signature of Wrong-Sign $hb\bar{b}$ Coupling