학술논문
New Results from HAYSTAC's Phase II Operation with a Squeezed State Receiver
Document Type
Working Paper
Author
HAYSTAC Collaboration; Jewell, M. J.; Leder, A. F.; Backes, K. M.; Bai, Xiran; van Bibber, K.; Brubaker, B. M.; Cahn, S. B.; Droster, A.; Esmat, Maryam H.; Ghosh, Sumita; Graham, Eleanor; Hilton, Gene C.; Jackson, H.; Laffan, Claire; Lamoreaux, S. K.; Lehnert, K. W.; Lewis, S. M.; Malnou, M.; Maruyama, R. H.; Palken, D. A.; Rapidis, N. M.; Ruddy, E. P.; Simanovskaia, M.; Singh, Sukhman; Speller, D. H.; Vale, Leila R.; Wang, H.; Zhu, Yuqi
Source
Subject
Language
Abstract
A search for dark matter axions with masses $>10 \mu eV/c^{2}$ 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 $17.14-17.28 \mu eV/c^{2}$($4.100-4.140$GHz) and $4.145-4.178$GHz) 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 $\sim$1.6 times faster with comparable sensitivity. No statistically significant evidence of an axion signal is found in the range $18.44-18.71\mu eV/c^{2}$($4.459-4.523$GHz), leading to an aggregate upper limit exclusion at the $90\%$ level on the axion-photon coupling of $2.06\times g_{\gamma}^{KSVZ}$.
Comment: 20 pages, 16 figures
Comment: 20 pages, 16 figures