2023/01/23 by M. J. Jewell, HAYSTAC Collaboration, A. Leder +54 · 12 citations
Physics and Astronomy · Computer Science · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Computational Physics and Python Applications
paper · pdf · doi:10.48550/arxiv.2301.09721
A search for dark matter axions with masses >10 μeV/c2 has been performed using the HAYSTAC experiment's squeezed state receiver to achieve sub-quantum limited noise. This report includes details of the design and operation of the experiment previously used to search for axions in the mass ranges 16.96-17.12 and 17.14-17.28 μeV/c2(4.100-4.140GHz) and 4.145-4.178GHz) as well as upgrades to facilitate an extended search at higher masses. These upgrades include improvements to the data acquisition routine which have reduced the effective dead time by a factor of 5, allowing for the new region to be scanned ∼1.6 times faster with comparable sensitivity. No statistically significant evidence of an axion signal is found in the range 18.44-18.71μeV/c2(4.459-4.523GHz), leading to an aggregate upper limit exclusion at the 90% level on the axion-photon coupling of 2.06× gγKSVZ.