Light-Cone 2024: Hadron Physics in the EIC era

Dark Photon Sensitivity Study in an η Factory Experiment at HIAF

Not scheduled

2h

Meeting Center, Institute of Modern Physics, Chinese Academy of Sciences (Huizhou, Guangdong, China)

Poster

Speaker

Zaiba Mushtaq (Institute of Modern Physics, CAS)

Description

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\title{Dark Photon Sensitivity Study in an $\eta$ Factory Experiment at HIAF}
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A simulation study has been conducted on dark photon sensitivity for a proposed $\eta$ factory experiment at Huizhou using the HIAF proton beam. The experiment, with a beam kinetic energy of 1.8 GeV, is expected to produce approximately $3.11 \times 10^{11}$ $\eta$ mesons in a one-month run, enabling a robust statistical analysis. A compact spectrometer, designed with a full silicon-pixel tracker, will detect final-state particles. Background estimation without the dark photon signal is performed using the GiBUU event generator, while a custom spectrometer simulation package, ChnsRoot, evaluates the spectrometer’s performance. The study provides detailed analysis of the efficiency and resolution of the targeted $\eta$ decay channel, along with the derived upper limit on the dark photon branching ratio and sensitivity to model parameters.

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