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New Constraints on Dark Photon Dark Matter with Superconducting Nanowire Detectors in an Optical Haloscope
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abstract
Uncovering the nature of dark matter is one of the most important goals of particle physics. Light bosonic particles, such as the dark photon, are well-motivated candidates: they are generally long-lived, weakly-interacting, and naturally produced in the early universe. In this work, we report on LAMPOST (Light $A'$ Multilayer Periodic Optical SNSPD Target), a proof-of-concept experiment searching for dark photon dark matter in the eV mass range, via coherent absorption in a multi-layer dielectric haloscope. Using a superconducting nanowire single-photon detector (SNSPD), we achieve efficient photon detection with a dark count rate (DCR) of $\sim 6\times10^{-6}$ counts/s. We find no evidence for dark photon dark matter in the mass range of $\sim 0.7$-$0.8$ eV with kinetic mixing $\epsilon \gtrsim 10^{-12}$, improving existing limits in $\epsilon$ by up to a factor of two. With future improvements to SNSPDs, our architecture could probe significant new parameter space for dark photon and axion dark matter in the meV to 10 eV mass range.
Forward citations
Cited by 6 Pith papers
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Light Dark Matter Detection with Sub-eV Transition-Edge Sensors
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Quantum measurement systems and applications to particle physics and cosmology
A survey of quantum-enhanced measurement technologies and their proposed applications to particle physics and cosmology, with a forward-looking discussion of new detector ideas.
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This is a pedagogical review of haloscope and helioscope experiments searching for dark matter and solar axions, with an overview of near-future technological developments.
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