The search for dark portal particles is a prominent topic at the frontier of particle *** present a simulation study of an experiment suitable for searching for scalar portal particles at the Huizhouη*** high-intensi...
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The search for dark portal particles is a prominent topic at the frontier of particle *** present a simulation study of an experiment suitable for searching for scalar portal particles at the Huizhouη*** high-intensity proton beam from HIAF and a high event-rate spectrometer are suggested to conduct this experiment,both of which are well-suited for the discovery of new *** a conservative estimation,ηevents could be produced during a one-month operation of the *** hadronic production ofηmesons(p+^(7)Li→ηX)was simulated at a beam energy of 1.8 GeV using the GiBUU event *** searched for light dark scalar particles through rare decay channels,namelyη→Sπ^(0)→π^(+)π^(-)π^(0)andη→Sπ^(0)→e^(+)e^(-)e^(0).The detection efficiencies of the channels and the spectrometer resolutions were studied in the *** also present the projected upper limits of the decay branching ratios of the dark scalar particle and the projected sensitivities to the model parameters.
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