Aaron Fienberg
A5012838114- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Gyrotron and Vacuum Electronics Research
- Atmospheric Ozone and Climate
- Radiation Detection and Scintillator Technologies
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Photocathodes and Microchannel Plates
- Particle Detector Development and Performance
- Radio Wave Propagation Studies
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Advanced Optical Sensing Technologies
- Spectroscopy and Laser Applications
- Astronomical Observations and Instrumentation
- Computational Physics and Python Applications
- Scientific Computing and Data Management
- Quantum Chromodynamics and Particle Interactions
- Optical Wireless Communication Technologies
Clark Atlanta University
2021-2024
University of Alaska Anchorage
2021-2024
Providence College
2021-2024
The University of Texas at Arlington
2021-2024
Southern University and Agricultural and Mechanical College
2021-2024
California University of Pennsylvania
2024
Pennsylvania State University
2020-2023
The University of Adelaide
2021-2023
University of Washington
2021-2023
Campbell Collaboration
2021
The IceCube Neutrino Observatory has established the existence of a high-energy all-sky neutrino flux astrophysical origin. This discovery was made using events interacting within fiducial region detector surrounded by an active veto and with reconstructed energy above 60 TeV, commonly known as starting event sample, or HESE. We revisit analysis HESE sample additional 4.5 years data, newer glacial ice models, improved systematics treatment. paper describes in detail, reports on latest...
We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, ω[over ˜]_{p}^{'}, anomalous precession frequency corrected for beam dynamics effects, ω_{a}. From ratio...
The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $ω_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run 2018. When combined a precision measurement magnetic field experiment's ring, determines anomaly $a_μ({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes...
Abstract We present a measurement of the high-energy astrophysical muon–neutrino flux with IceCube Neutrino Observatory. The uses high-purity selection 650k neutrino-induced muon tracks from northern celestial hemisphere, corresponding to 9.5 yr experimental data. With respect previous publications, is improved by increased size event sample and extended model testing beyond simple power-law hypotheses. An updated treatment systematic uncertainties atmospheric background fluxes has been...
The results of a 3+1 sterile neutrino search using eight years data from the IceCube Neutrino Observatory are presented. A total 305 735 muon events analyzed in reconstructed energy-zenith space to test for signatures matter-enhanced oscillation that would occur given state with mass-squared differences between 0.01 and 100 eV2. best-fit point is found be at sin2(2θ24)=0.10 Δm241=4.5 eV2, which consistent no hypothesis p value 8.0%.Received 8 June 2020Accepted 31 August...
Continued improvements on existing reconstruction methods are vital to the success of high-energy physics experiments, such as IceCube Neutrino Observatory. In IceCube, further challenges arise detector is situated at geographic South Pole where computational resources limited. However, perform real-time analyses and issue alerts telescopes around world, powerful fast desired. Deep neural networks can be extremely powerful, their usage computationally inexpensive once trained. These...
Gamma-ray bursts (GRBs) are considered as promising sources of ultra-high-energy cosmic rays (UHECRs) due to their large power output. Observing a neutrino flux from GRBs would offer evidence that hadronic accelerators UHECRs. Previous IceCube analyses, which primarily focused on neutrinos arriving in temporal coincidence with the prompt gamma rays, found no significant excess. The four analyses presented this paper extend region interest 14 days before and after phase, including generic...
Using data from the IceCube Neutrino Observatory, we searched for high-energy neutrino emission gravitational-wave events detected by advanced LIGO and Virgo detectors during their third observing run. We did a low-latency follow-up on public candidate released detectors' run an archival search 80 confident reported in GWTC-2.1 GWTC-3 catalogs. An extended was also conducted longer timescales neutron star containing mergers. Follow-up searches optical counterpart of GW190521 were conducted....
We present details on a new measurement of the muon magnetic anomaly, $a_\mu = (g_\mu -2)/2$. The result is based positive data taken at Fermilab's Muon Campus during 2019 and 2020 accelerator runs. uses $3.1$ GeV$/c$ polarized muons stored in $7.1$-m-radius storage ring with $1.45$ T uniform field. value $ a_{\mu}$ determined from measured difference between spin precession frequency its cyclotron frequency. This normalized to strength field, using Nuclear Magnetic Resonance (NMR). ratio...
We report in detail on searches for eV-scale sterile neutrinos, the context of a 3+1 model, using eight years data from IceCube Neutrino Telescope. By analyzing reconstructed energies and zenith angles 305,735 atmospheric νμ ¯νμ events we construct confidence intervals two analysis spaces: sin2(2θ24) vs Δm241 under conservative assumption θ34=0; sin2(2θ34) given sufficiently large that fast oscillation features are unresolvable. Detailed discussions event selection, systematic uncertainties,...
High-energy tau neutrinos are rarely produced in atmospheric cosmic-ray showers or at cosmic particle accelerators, but expected to emerge during neutrino propagation over distances due flavor mixing. When high energy interact inside the IceCube detector, two spatially separated depositions may be resolved, first from charged current interaction and second lepton decay. We report a novel analysis of 7.5 years data that identifies candidate among 60 ``High-Energy Starting Events'' (HESE)...
The sources of the majority high-energy astrophysical neutrinos observed with IceCube neutrino telescope at South Pole are unknown. So far, only a gamma-ray blazar was compellingly associated emission neutrinos. In addition, several studies suggest that from population accounts for small fraction total flux. this work we probe production in cores Active Galactic Nuclei (AGN), induced by accelerated cosmic rays accretion disk region. We present likelihood analysis based on eight years data,...
The flux of high-energy neutrinos passing through the Earth is attenuated due to their interactions with matter. interaction rate modulated by neutrino cross section and affects arriving at IceCube Neutrino Observatory, a cubic-kilometer detector embedded in Antarctic ice sheet. We present measurement between 60 TeV 10 PeV using starting events (HESE) sample from 7.5 years data. result binned energy obtained both Bayesian frequentist statistics. find it compatible predictions Standard Model....
We present a measurement of the density GeV muons in near-vertical air showers using three years data recorded by IceTop array at South Pole. Depending on shower size, muon densities have been measured lateral distances between 200 and 1000 m. From these distributions, we derive as functions energy reference 600 800 m for primary energies 2.5 40 PeV 9 120 PeV, respectively. The are determined using, baseline, hadronic interaction model Sibyll 2.1 together with various composition models....
Abstract In this work, we present the results of searches for signatures dark matter decay or annihilation into Standard Model particles, and secret neutrino interactions with matter. Neutrinos could be produced in galactic extragalactic Additionally, if an interaction between neutrinos exists then will interact neutrinos. particular induce anisotropy sky is present. We use seven a half years High-Energy Starting Event (HESE) sample data, which measures energy range approximately 60 TeV to...
Abstract. The IceCube Neutrino Observatory instruments about 1 km3 of deep, glacial ice at the geographic South Pole. It uses 5160 photomultipliers to detect Cherenkov light emitted by charged relativistic particles. An unexpected propagation effect observed experiment is an anisotropic attenuation, which aligned with local flow direction ice. We examine birefringent through polycrystalline microstructure as a possible explanation for this effect. predictions first-principles model developed...
We report here an extension of the measurement all-particle cosmic-ray spectrum with IceTop to lower energy. The new gives full coverage knee region and reduces gap in energy between previous direct measurements. With a trigger that selects events closely spaced detectors center array, threshold is lowered by almost order magnitude below its 2 PeV. In this paper, we explain how implemented, describe machine-learning method developed deal very few hit. compare results measurements others...
IceCube has performed several all-sky searches for point-like neutrino sources using track-like events, including a recent time-integrated analysis 10 years of data. This paper accompanies the public data release these candidates detected by between April 6, 2008 and July 8, 2018. The selection includes through-going tracks, primarily due to muon candidates, that reach detector from all directions, as well track events start within instrumented volume. An updated reconstruction taken after...
We present an all-sky 90% confidence level upper limit on the cosmic flux of relativistic magnetic monopoles using 2886 days IceCube data. The analysis was optimized for monopole speeds between 0.750c and 0.995c, without any explicit restriction mass. constrain to a below 2.0×10^{-19} cm^{-2} s^{-1} sr^{-1} over majority targeted speed range. This result constitutes most strict date with β≳0.8 up β∼0.995 fills gap existing limits nonrelativistic ultrarelativistic monopoles.
Beginning in 2016, the IceCube Neutrino Observatory has sent out alerts real time containing information of high-energy ($E \gtrsim 100$~TeV) neutrino candidate events with moderate-to-high ($\gtrsim 30$\%) probability astrophysical origin. In this work, we use a recent catalog such alert events, which, addition to announced real-time, includes that were identified retroactively, and covers period 2011-2020. We also search for additional, lower-energy, neutrinos from arrival directions these...
In multi-messenger astronomy, rapid investigation of interesting transients is imperative. As an observatory with a 4$\pi$ steradian field view and $\sim$99\% uptime, the IceCube Neutrino Observatory unique facility to follow up transients, provide valuable insight for other observatories inform their observing decisions. Since 2016, has been using low-latency data rapidly respond astrophysical events reported by observational community. Here, we describe pipeline used perform these analyses...
Abstract We present the first comprehensive search for high-energy neutrino emission from high- and low-mass X-ray binaries conducted by IceCube. Galactic are long-standing candidates source of hadronic cosmic rays neutrinos. The compact object in these systems can be site cosmic-ray acceleration, neutrinos produced interactions with radiation or gas, jet a microquasar, stellar wind, atmosphere companion star. study using 7.5 yr IceCube data three separate analyses. In first, we periodic 55...