A. Sonnenschein
A5025174361- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Superconducting and THz Device Technology
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Quantum Information and Cryptography
- Radiation Therapy and Dosimetry
- CCD and CMOS Imaging Sensors
- Quantum Chromodynamics and Particle Interactions
- Advanced Chemical Physics Studies
- Superconducting Materials and Applications
- Random lasers and scattering media
- Radio Astronomy Observations and Technology
- Age of Information Optimization
- Experimental and Theoretical Physics Studies
- Advanced Thermodynamics and Statistical Mechanics
- Quantum, superfluid, helium dynamics
- Terahertz technology and applications
Fermi National Accelerator Laboratory
2015-2024
University of Chicago
2004-2024
University of Bonn
2023
University of Virginia
2009
Princeton University
2002-2009
University of Massachusetts Amherst
2009
University of Notre Dame
2009
Temple University
2009
Augustana College
2009
University of Houston
2009
This Letter reports the results from a haloscope search for dark matter axions with masses between 2.66 and 2.81 μeV. The excludes range of axion-photon couplings predicted by plausible models invisible axion. unprecedented sensitivity is achieved operating large-volume at subkelvin temperatures, thereby reducing thermal noise as well excess ultralow-noise superconducting quantum interference device amplifier used signal power readout. Ongoing searches will provide nearly definitive tests...
This Letter reports on a cavity haloscope search for dark matter axions in the Galactic halo mass range 2.81-3.31 μeV. utilizes combination of low-noise Josephson parametric amplifier and large-cavity to achieve unprecedented sensitivity across this range. excludes full axion-photon coupling values predicted benchmark models invisible axion that solve strong CP problem quantum chromodynamics.
New data are reported from the operation of a 4.0 kg CF$_{3}$I bubble chamber in 6800-foot-deep SNOLAB underground laboratory. The effectiveness ultrasound analysis discriminating alpha-decay background events single nuclear recoils has been confirmed, with lower bound $>$99.3% rejection events. Twenty recoil event candidates and three multiple were observed during total exposure 553 kg-days distributed over different nucleation thresholds. effective for recoil-like was 437.4 kg-days. A...
New results are reported from the operation of PICO-60 dark matter detector, a bubble chamber filled with 52 kg C_{3}F_{8} located in SNOLAB underground laboratory. As previous PICO chambers, exhibits excellent electron recoil and alpha decay rejection, observed multiple-scattering neutron rate indicates single-scatter background less than one event per month. A blind analysis an efficiency-corrected 1167-kg day exposure at 3.3-keV thermodynamic threshold reveals no single-scattering nuclear...
New data are reported from the operation of a 2 liter ${\mathrm{C}}_{3}{\mathrm{F}}_{8}$ bubble chamber in SNOLAB underground laboratory, with total exposure 211.5 kg days at four different energy thresholds below 10 keV. These show that provides excellent electron-recoil and alpha rejection capabilities very low thresholds. The exhibits an sensitivity $<3.5\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}10}$ factor $>98.2%$. also include first observation dependence acoustic signal on...
Final results are reported from operation of the PICO-60 C$_3$F$_8$ dark matter detector, a bubble chamber filled with 52 kg located in SNOLAB underground laboratory. The was operated at thermodynamic thresholds as low 1.2 keV without loss stability. A new blind 1404-kg-day exposure 2.45 threshold acquired approximately same expected total background rate previous 1167-kg-day 3.3 keV. This increased is enabled part by optical tracking analysis to better identify events near detector walls,...
We introduce the Broadband Reflector Experiment for Axion Detection (BREAD) conceptual design and science program. This haloscope plans to search bosonic dark matter across [10^{-3},1] eV ([0.24, 240] THz) mass range. BREAD proposes a cylindrical metal barrel convert into photons, which novel parabolic reflector focuses onto photosensor. unique geometry enables enclosure in standard cryostats high-field solenoids, overcoming limitations of current dish antennas. A pilot 0.7 m^{2} experiment...
The Cryogenic Dark Matter Search (CDMS) employs Ge and Si detectors to search for weakly interacting massive particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against of background particles. CDMS data, accounting the neutron background, give limits on spin-independent WIMP-nucleon cross section that exclude unexplored parameter space above 10 GeV/c2 WIMP mass and, at >75% C.L., entire 3sigma allowed region signal reported by DAMA experiment.
Bubble Chambers provided the dominant particle detection technology in accelerator experiments for several decades, eventually falling into disuse with advent of other techniques. We report here on first period operation an ultra-clean, room-temperature bubble chamber containing 1.5 kg superheated CF$_{3}$I, a target maximally sensitive to spin-dependent and -independent Weakly Interacting Massive Particle (WIMP) couplings. An exposure excess 250 kg-days is obtained, live-time fraction...
As part of the Snowmass process, Cosmic Frontier WIMP Direct Detection subgroup (CF1) has drawn on input from and broader Particle Physics community to produce this document. The charge CF1 was (a) summarize current status projected sensitivity direct detection experiments worldwide, (b) motivate dark matter searches over a broad parameter space by examining spectrum models, (c) establish consensus type experimental program required explore that space, (d) identify common infrastructure...
The PICO collaboration reports results obtained by PICO-2L Run-2 after carefully controlling for particulate contamination. data clearly indicates that previously observed anomalies were due to contamination in the bubble chamber fluid. These observations set new bounds on spin-dependent scattering of dark matter, and help pave way larger scale experiments.
Data from the operation of a bubble chamber filled with 3.5 kg CF3I in shallow underground site are reported. An analysis ultrasound signals accompanying nucleations confirms that alpha decays generate significantly louder acoustic emission than single nuclear recoils, leading to an efficient background discrimination. Three dark matter candidate events were observed during effective exposure 28.1 day, consistent neutron background. This observation provides strong direct detection...
The μeV axion is a well-motivated extension to the standard model. Axion Dark Matter eXperiment (ADMX) collaboration seeks discover this particle by looking for resonant conversion of dark-matter axions microwave photons in strong magnetic field. In Letter, we report results from pathfinder experiment, ADMX "Sidecar," which designed pave way future, higher mass, searches. This testbed experiment lives inside and operates tandem with main experiment. Sidecar excludes masses three widely...
New data are reported from the operation of PICO-60 dark matter detector, a bubble chamber filled with 36.8 kg CF$_3$I and located in SNOLAB underground laboratory. is largest to search for date. With an analyzed exposure 92.8 livedays, exhibits same excellent background rejection observed smaller chambers. Alpha decays exhibit frequency-dependent acoustic calorimetry, similar but not identical that recently C$_3$F$_8$ chamber. also observes large population unknown events, exhibiting...
Searching for axion dark matter, the ADMX Collaboration acquired data from January to October 2018, over mass range 2.81–3.31 μeV, corresponding frequency 680–790 MHz. Using an haloscope consisting of a microwave cavity in strong magnetic field, experiment excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions at 90% confidence level and 100% matter density this entire range, except few gaps due mode crossings. This paper explains full analysis run 1B, motivating choices informed by...
We describe the first implementation of a Josephson Traveling Wave Parametric Amplifier (JTWPA) in an axion dark matter search. The operation JTWPA for period about two weeks achieved sensitivity to axion-like particle with axion-photon couplings above 10-13 Ge V-1 over narrow range masses centered around 19.84 µeV by tuning resonant frequency cavity 4796.7-4799.5 MHz. was operated insert experiment as part independent receiver chain that attached 0.56-l cavity. ability deliver high gain...
The Cryogenic Dark Matter Search (CDMS) employs low-temperature Ge and Si detectors to search for weakly interacting massive particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against of background particles. For recoil energies above 10 keV, events due photons are rejected $>99.9%$ efficiency, surface $>95%$ efficiency. estimate the neutrons is based primarily on observation multiple-scatter that should all be neutrons. Data selection determined by...
A direct dark matter search is performed using fully-depleted high-resistivity CCD detectors. Due to their low electronic readout noise (R.M.S. ∼7 eV) these devices operate with a very detection threshold of 40 eV, making the for particles masses (∼5 GeV) possible. The results an engineering run in shallow underground site are presented, demonstrating potential this technology mass region.
Axion dark matter experiment ultra-low noise haloscope technology has enabled the successful completion of two science runs (1A and 1B) that looked for axions in 2.66-3.1 μeV mass range with Dine-Fischler-Srednicki-Zhitnisky sensitivity [Du et al., Phys. Rev. Lett. 120, 151301 (2018) Braine 124, 101303 (2020)]. Therefore, it is most sensitive axion search to date this range. We discuss technological advances made last several years achieve sensitivity, which includes implementation...
We present first results from a dark photon matter search in the mass range 44 to 52 μeV (10.7-12.5 GHz) using room-temperature dish antenna setup called GigaBREAD. Dark converts ordinary photons on cylindrical metallic emission surface with area 0.5 m^{2} and is focused by novel parabolic reflector onto horn antenna. Signals are read out low-noise receiver system. A data taking run 24 days of does not show evidence for this range, excluding mixing parameters χ≳10^{-12} at 90% confidence...
We present the results from first axion-like particle search conducted using a dish antenna. The experiment was at room temperature and sensitive to particles in $44-52\,\mu\mathrm{eV}$ range ($10.7 - 12.5\,\mathrm{GHz}$). novel antenna geometry proposed by BREAD collaboration previously used conduct dark photon same mass range. To allow for sensitivity, placed $3.9\,\mathrm{T}$ solenoid magnet Argonne National Laboratory. In presence of magnetic field, matter converts photons conductive...
The BGOOD photoproduction experiment accesses forward meson angles and low momentum exchange kinematics in the $uds$ sector, which may be sensitive to molecular-like hadron structure. Our results strangeness sector suggest a dominant role of meson-baryon dynamics. This includes structures $K^0\Sigma^0$, $K^+\Sigma^0$ $K^+\Sigma^0(1385)$ residing at $\Sigma^{(*)}K^{(*)}$ thresholds have an equivalence $P_C$ states $\Sigma_C^{(*)}\bar D^{(*)}$ thresholds. In non-strange baryon-baryon...