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The axion was first introduced as a consequence of the Peccei-Quinn mechanism to solve the CP problem in strong interactions of particle physics and is a well motivated cold dark matter candidate. This particle is expected to interact…

Instrumentation and Detectors · Physics 2020-12-08 S. W. Youn , E. Sala , J. Jeong , J. Kim , Y. K. Semertzidis

We report a pilot dark-matter search with a cryogenic, magnetized, scaled-down DALI prototype. An analysis of 36 hours of data reveals no statistically significant excess attributable to axionlike particles. We therefore set new exclusion…

We report new experimental results on the search for dark photons based on a near-quantum-limited haloscope equipped with a superconducting cavity. The loaded quality factor of the superconducting cavity is $6\times10^{5}$, so that the…

High Energy Physics - Experiment · Physics 2024-04-22 Runqi Kang , Man Jiao , Yu Tong , Yang Liu , Youpeng Zhong , Yi-Fu Cai , Jingwei Zhou , Xing Rong , Jiangfeng Du

A haloscope of the QUAX--$a\gamma$ experiment composed of an oxygen-free high thermal conductivity-Cu cavity inside an 8.1 T magnet and cooled to $\sim200$ mK is put in operation for the search of galactic axion with mass…

The Center for Axion and Precision Physics research at the Institute for Basic Science is searching for axion dark matter using ultra-low temperature microwave resonators. We report the exclusion of the axion mass range 10.7126$-$10.7186…

A preliminary result of the solar axion search experiment at the University of Tokyo is presented. We searched for axions which could be produced in the solar core by exploiting the axion helioscope. The helioscope consists of a…

High Energy Physics - Experiment · Physics 2009-10-31 Makoto Minowa , Shigetaka Moriyama , Yoshizumi Inoue , Toshio Namba , Yuko Takasu , Akira Yamamoto

The HAYSTAC experiment utilizes a tunable resonant microwave cavity to search for dark matter axions. We report on the system and the results from Phase I of the experiment. This phase relied on a 9 T magnet, Josephson parametric…

Instrumentation and Detectors · Physics 2018-09-19 Nicholas M. Rapidis

The axion, which has yet to be discovered, is a promising candidate for dark matter that emerges from Peccei-Quinn theory. This article presents the search for axion dark matter with the "Student Project for an Axion Cavity Experiment"…

High Energy Physics - Experiment · Physics 2025-10-29 M. A. Akgümüs , N. Salama , J. Egge , E. Garutti , M. Maroudas , L. H. Nguyen , D. Leppla-Weber

We describe in detail the analysis procedure used to derive the first limits from the Haloscope at Yale Sensitive to Axion CDM (HAYSTAC), a microwave cavity search for cold dark matter (CDM) axions with masses above $20\ \mu\text{eV}$. We…

Instrumentation and Methods for Astrophysics · Physics 2017-12-25 B. M. Brubaker , L. Zhong , S. K. Lamoreaux , K. W. Lehnert , K. A. van Bibber

We present new results of a room temperature resonant AC haloscope, which searches for axions via photon upconversion. Traditional haloscopes require a strong applied DC magnetic background field surrounding the haloscope cavity resonator,…

High Energy Physics - Experiment · Physics 2023-06-08 Catriona A. Thomson , Maxim Goryachev , Ben T. McAllister , Eugene N. Ivanov , Paul Altin , Michael E. Tobar

The SUPerconduction AXion search experiment (Supax) is a future haloscope-type detector designed to probe axion-like particles (ALPs) as candidates for dark matter and solutions to the strong-CP problem in the mass range between $8\,\mu$eV…

High Energy Physics - Experiment · Physics 2026-03-12 Tim Schneemann , Hendrik Bekker , Dmitry Budker , Kristof Schmieden , Matthias Schott , Malavika Unni , Arne Wickenbrock

The axion is a light pseudoscalar particle which suppresses CP-violating effects in strong interactions and also happens to be an excellent dark matter candidate. Axions constituting the dark matter halo of our galaxy may be detected by…

The cavity haloscope technique has been the most successful approach to date in searching for axion dark matter, owing to a confluence of factors at the GHz scale including the macroscopic size of the axion-to-photon converting cavity…

High Energy Physics - Experiment · Physics 2026-01-30 Erik W. Lentz , Christian R. Boutan , Matthew S. Taubman , Kevin L. Gervais

The dark photon is a well motivated candidate for the dark matter which comprises most of the mass of our visible Universe, leading to worldwide experimental and observational efforts towards its discovery. A primary tool in this search is…

High Energy Physics - Experiment · Physics 2026-04-01 Yuan-Hann Chang , Cheng-Wei Chiang , Hien Thi Doan , Nick Houston , Jinmian Li , Tianjun Li , Lina Wu , Xin Zhang

Laboratory searching for dark matter is crucial for understanding several fundamental conundrums in physics and cosmology. Most cavity-based haloscope searches focus on the frequency range below 10 GHz, while the parameter space with higher…

Cosmology and Nongalactic Astrophysics · Physics 2025-04-22 Yue Yin , Runqi Kang , Man Jiao , Xing Rong

The axion is a hypothetical particle, a promising candidate for dark matter, and a solution to the strong CP problem. Axion haloscope search experiments deal with a signal power comparable to noise uncertainty at millikelvin temperature. We…

The axion is a hypothetical particle which is a candidate for cold dark matter. Haloscope experiments directly search for these particles in strong magnetic fields with RF cavities as detectors. The Relic Axion Detector Exploratory Setup…

Existence of dark matter indicates the presence of unknown fundamental laws of nature. Ultralight axion-like particles are well-motivated dark matter candidates, emerging naturally from theories of physics at ultrahigh energies. We report…

High Energy Physics - Experiment · Physics 2021-01-11 Alexander V. Gramolin , Deniz Aybas , Dorian Johnson , Janos Adam , Alexander O. Sushkov

The ADMX collaboration gathered data for its Run 1A axion dark matter search from January to June 2017, scanning with an axion haloscope over the frequency range 645-680 MHz (2.66-2.81 ueV in axion mass) at DFSZ sensitivity. The resulting…