Search for MeV-Scale Axionlike Particles and Dark Photons with PandaX-4T

Abstract

Axionlike particles (ALPs) and dark photons (DPs) are viable dark matter particle candidates. We have searched for possible ALP/DP signals in the PandaX-4T liquid xenon detector using 440 kg$\cdot$yr of data. A binned likelihood fit is constructed to search for possible mono-energetic peaks induced by the absorption processes between ALPs/DPs and atomic electrons of xenon. A detailed temporal model of decays associated with xenon isotopes is introduced to constrain the number of background events. No signal excess over background expectations is observed, and we have established the most stringent exclusion limits for most ALP/DP masses across the range of 150 keV/$c^2$ to 1 MeV/$c^2$. The improvement is particularly significant within the mass range of \text{150-400}~keV/$c^2$, with the average factor of 3.5 compared to previous results.

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Cited by in corpus (6)

• Searching for Neutrinoless Double-Beta Decay of ${}^{136}$Xe with PandaX-4T
• Design and characterization of a photosensor system for the RELICS experiment
• CMB Constraints on Loop-Induced Decays of Leptophilic Dark Matter
• Precise ${}^{136}$Xe Double Beta Decay Measurement in PandaX-4T with Implications on the Nuclear Matrix Elements and Majorons
• INTEGRAL, eROSITA and Voyager Constraints on Light Bosonic Dark Matter: ALPs, Dark Photons, Scalars, $B-L$ and $L_i-L_j$ Vectors
• Emerging axion detection in artificial magnetoelectric materials