Dark Matter Axion Search with HAYSTAC Phase II

Abstract

This Letter reports new results from the HAYSTAC experiment's search for dark matter axions in our galactic halo. It represents the widest search to date that utilizes squeezing to realize sub-quantum limited noise. The new results cover 1.71 $\mu$eV of newly scanned parameter space in the mass ranges 17.28-18.44 $\mu$eV and 18.71-19.46 $\mu$eV. No statistically significant evidence of an axion signal was observed, excluding couplings $|g_{\gamma }|\ge$ 2.75$\times$$|g_{\gamma }^{\text{KSVZ}}|$ and $|g_{\gamma }|\ge$ 2.96$\times$$|g_{\gamma }^{\text{KSVZ}}|$ at the 90$\%$ confidence level over the respective region. By combining this data with previously published results using HAYSTAC's squeezed state receiver, a total of 2.27 $\mu$eV of parameter space has now been scanned between 16.96-19.46 $\mu$eV, excluding $|g_{\gamma }|\ge$ 2.86$\times$$|g_{\gamma }^{\text{KSVZ}}|$ at the 90$\%$ confidence level. These results demonstrate the squeezed state receiver's ability to probe axion models over a significant mass range while achieving a scan rate enhancement relative to a quantum-limited experiment.

6 pages, 3 figures

References in corpus (16)

• First results from a microwave cavity axion search at 24 micro-eV
• The dark-matter axion mass
• Galactic axions search with a superconducting resonant cavity
• Piezoelectrically Tuned Multimode Cavity Search for Axion Dark Matter
• The HAYSTAC Axion Search Analysis Procedure
• Design and Operational Experience of a Microwave Cavity Axion Detector for the 20-100 micro-eV Range
• Search for Dark Matter Axions with CAST-CAPP
• Axion Dark Matter Search around 4.55 $\mu$eV with Dine-Fischler-Srednicki-Zhitnitskii Sensitivity
• Search for galactic axions with a high-Q dielectric cavity
• Spectrum of global string networks and the axion dark matter mass
• Simulations of axion-like particles in the post-inflationary scenario
• Search for galactic axions with a traveling wave parametric amplifier
• Search for Axion dark matter with the QUAX-LNF tunable haloscope
• Extended Axion Dark Matter Search Using the CAPP18T Haloscope
• Bandwidth and visibility improvement in detection of a weak signal using mode entanglement and swapping
• An improved synthetic signal injection routine for the Haloscope At Yale Sensitive To Axion Cold dark matter (HAYSTAC)

Cited by in corpus (14)

• Catalogues of Cosmologically Self-Consistent Hadronic QCD Axion Models
• Dark matter as the source of neutrino mass: theory overview and experimental prospects
• Annual-modulation fingerprint of the axion wind induced sideband triplet in quantum dot spin qubit sensors
• Stripped-Envelope Supernovae for QCD Axion Detection
• Search for post-inflationary QCD axions with a quantum-limited tunable microwave receiver
• Axions at the meV Crossroads: Theory, Cosmology, Astrophysics, and Experiments
• Search for high-frequency gravitational waves via re-analysis of cavity axion data
• Detecting dark matter using optically trapped Rydberg atom tweezer arrays
• Resonant enhancement of axion dark matter decay
• High-$Q$ Superconducting Lumped-Element Resonators for Low-Mass Axion Searches
• A Way of Axion Detection with Mass $10^{-4}\text{-}10^{-3}$eV Using Cylindrical Sample with Low Electric Conductivity
• Search for Dark Photons between 16.96--19.52 $\mu$eV with the HAYSTAC Experiment
• Extended Haloscope Search and Exclusion of a Candidate Signal near 1.036 GHz
• Smoking gun signature from axion and the constraints with radio telescopes