First Search for the Sagittarius Tidal Stream of Axion Dark Matter around 4.55 μ\muμeV (original) (raw)

CAPP-8TB: Search for Axion Dark Matter in a Mass Range of 6.62 to 7.04 μeV

Proceedings of European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2019), 2020

The axion is a hypothetical particle proposed to solve the strong CP problem, and also a candidate for dark matter. This non-relativistic particle in the galactic halo can be converted into a photon under a strong magnetic field and detected with a microwave resonant cavity. Relying on this detection method, many experiments have excluded some mass regions with certain sensitivities in terms of axion-photon coupling (g aγγ) for decades, but no axion dark matter has been discovered to date. CAPP-8TB is another axion haloscope experiment at IBS/CAPP designed to search for the axion in a mass range of 6.62 to 7.04 µeV. The experiment aims for the most sensitive axion dark matter search in this particular mass range with its first-phase sensitivity reaching the QCD axion band. In this presentation, we discuss the overview of the experiment, and present the first result. We also discuss an upgrade of the experiment to achieve higher sensitivity.

Search for the axion dark matter in the mass range of 6.62–6.82 μeV

Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020), 2021

The axion is a hypothetical particle associated with the spontaneous symmetry breaking of the (1) symmetry, proposed by Pecci and Quinn to resolve the Charge-Parity () problem in quantum chromodynamics. For invisible axions, cosmological and astrophysical observations impose the lower and upper limits on axion mass of eV and meV respectively. The axion in such a mass range could be a promising candidate for the cold dark matter. The CAPP-8TB experiment searches for the axion by detecting photons, produced by the axion-photon coupling, resonating in a microwave cavity. The experiment has recently obtained a result of axion search in the mass range of 6.62-6.82 eV. At the 90 % confidence level we probed the QCD axion down to a theoretical boundary, which is the most sensitive experimental result in the specific mass range to date. In this paper we will explain the detail of the experimental setup, parameters and analysis procedure. A plan for the next phase of the experiment for different mass ranges will also be discussed.

Experimental Constraints on the Axion Dark Matter Halo Density

The Astrophysical Journal, 2002

Most of the mass of the Milky Way is contributed by its halo, presumably in the form of noninteracting cold dark matter. The axion is a compelling cold dark matter candidate. We report results from a search that probes the local Galactic halo axion density using the Sikivie radio frequency cavity technique. Candidates over the frequency range 550 MH MHz (2.3 me meV) were investigated. The absence of a signal z ≤ f ≤ 810 V ≤ m ≤ 3.4 a suggests that the axions of Kim and Shifman, Vainshtein, & Zakharov contribute no more than 0.45 GeV cm Ϫ3 of mass density to the local dark matter halo over this mass range.

Cold Dark Matter Axion - A New Mass Window from Cosmological Bounds

ArXiv, 2024

Based upon a previous axion mass proposal and detection scheme, as well as considering the axion mass ranges suggested by cogent simulations in recent years, we present a revised axion/ALP search strategy and our calculations, concentrating on a narrow axion mass (and corresponding Compton frequency) window in this report. The window comprises the spectral region of 18.99 to 19.01GHz (that falls within the Ku microwave band), with a center frequency of 19.00GHz (+0.1GHz), with equivalence to am axion mass range of 78.6 to 79.6 eV, with the center mass at the value of 78.582 (+5.0) eV, our suggested most likely value for an axionic/ALP field mass, if these fields exist. Our search strategy, as summarized herewith, is based upon the assumption that the dark matter that exists in the current epoch of our physical universe is dominated by axions and thus the local observable axion density is the density of the light cold dark matter, permeating our local neighborhood (mainly in the Milky Way galactic halo). Some ideas and the design of an experiment, built around a Josephson Parametric Amplifier and Resonant Tunneling Diode combo installed in a resonant RF cavity, are also introduced in this report.

High resolution search for dark-matter axions

Physical Review D, 2006

We have performed a high resolution search for galactic halo axions in cold flows using a microwave cavity detector. The analysis procedure and other details of this search are described. No axion signal was found in the mass range 1.98-2.17 µeV. We place upper limits on the density of axions in local discrete flows based on this result.

"Snowmass 2021" conference: Axion as Dark Matter

Axions are well-motivated dark matter candidates with simple cosmological production mechanisms. They were originally introduced to solve the strong CP problem, but also arise in a wide range of extensions to the Standard Model. This Snowmass white paper summarizes axion phenomenology and outlines next-generation laboratory experiments proposed to detect axion dark matter. There are vibrant synergies with astrophysical searches and advances in instrumentation including quantumenabled readout, high-Q resonators and cavities and large high-field magnets. This white paper outlines a clear roadmap to discovery, and shows that the US is wellpositioned to be at the forefront of the search for axion dark matter in the coming decade.

Search for axions in streaming dark matter

arXiv: Instrumentation and Detectors, 2017

A new search strategy for the detection of the elusive dark matter (DM) axion is proposed. The idea is based on streaming DM axions, whose flux might get temporally enormously enhanced due to gravitational lensing. This can happen if the Sun or some planet (including the Moon) is found along the direction of a DM stream propagating towards the Earth location. The experimental requirements to the axion haloscope are a wide-band performance combined with a fast axion rest mass scanning mode, which are feasible. Once both conditions have been implemented in a haloscope, the axion search can continue parasitically almost as before. Interestingly, some new DM axion detectors are operating wide-band by default. In order not to miss the actually unpredictable timing of a potential short duration signal, a network of co-ordinated axion antennae is required, preferentially distributed world-wide. The reasoning presented here for the axions applies to some degree also to any other DM candidat...

Search for the Sagittarius tidal stream of axion dark matter around 4.55 μeV

Physical Review D

We report the first search for the Sagittarius tidal stream of axion dark matter around 4.55 μeV using CAPP-12 TB haloscope data acquired in March of 2022. Our result excluded the Sagittarius tidal stream of Dine-Fischler-Srednicki-Zhitnitskii and Kim-Shifman-Vainshtein-Zakharov axion dark matter densities of ρ a ≳ 0.184 and ≳0.025 GeV=cm 3 , respectively, over a mass range from 4.51 to 4.59 μeV at a 90% confidence level.

Results from UPLOAD-DOWNLOAD: A phase-interferometric axion dark matter search

2019

First experimental results from a room-temperature table-top phase-sensitive axion haloscope experiment are presented. A dual-mode configuration exploits the axion-photon coupling, which serves as a source of frequency modulation in microwave cavity resonances, offering a new pathway to axion detection with certain advantages over the traditional haloscope method. A tunable copper cavity supports orthogonally polarized microwave modes, enabling simultaneous sensitivity to axions with masses corresponding to the sum and difference of the microwave frequencies. The results place axion exclusion limits between 11.6 - 19.4 neV, excluding a minimal coupling strength above ∼5× 10^-7 1/GeV, and simultaneously place limits between 74.45 - 74.46 μeV at ∼2×10^-3 1/GeV, after a measurement period of two hours. We show that, in some frequency ranges, a cryogenic implementation of this technique, ambitious but realizable, may reach axion model limits.

Results from a High-Sensitivity Search for Cosmic Axions

Physical Review Letters, 1998

We report the first results of a high-sensitivity (∼ 10 −23 W) search for light halo axions through their conversion to microwave photons. At 90% confidence we exclude a KSVZ axion of mass 2.9 × 10 −6 eV to 3.3 × 10 −6 eV as the dark matter in the halo of our Galaxy.