K. Beattie
A5072810929- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Scientific Computing and Data Management
- Gamma-ray bursts and supernovae
- Cinema and Media Studies
- Distributed and Parallel Computing Systems
- Radio Astronomy Observations and Technology
- Water Quality Monitoring Technologies
- Semantic Web and Ontologies
- Atomic and Subatomic Physics Research
- Analytical Chemistry and Sensors
- Public Relations and Crisis Communication
- Particle accelerators and beam dynamics
- Scientific Research and Discoveries
- Research Data Management Practices
- Political and Economic history of UK and US
- Solar and Space Plasma Dynamics
- Quantum Chromodynamics and Particle Interactions
- Italian Fascism and Post-war Society
- Advanced X-ray Imaging Techniques
- Open Source Software Innovations
- Particle Detector Development and Performance
- Cell Image Analysis Techniques
Lawrence Berkeley National Laboratory
2012-2024
University of Maryland, College Park
2011
Institute of Particle Physics
2009
Lawrence Livermore National Laboratory
2008
Uppsala University
2006
University of Bonn
2006
University of California, Berkeley
2006
The IceCube Neutrino Observatory is a cubic-kilometer-scale high-energy neutrino detector built into the ice at South Pole. Construction of IceCube, largest to date, was completed in 2011 and enabled discovery astrophysical neutrinos. We describe here design, production, calibration digital optical module (DOM), cable systems, computing hardware, our methodology for drilling deployment. also online triggering data filtering systems that select candidate cosmic ray events analysis. Due...
The LUX-ZEPLIN experiment is a dark matter detector centered on dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. This Letter reports results from LUX-ZEPLIN's first search for weakly interacting massive particles (WIMPs) with an exposure of 60~live days using fiducial mass 5.5 t. A profile-likelihood ratio analysis shows data to be consistent background-only hypothesis, setting new limits spin-independent...
We have performed a search for muon neutrinos from dark matter annihilation in the center of Sun with 79-string configuration IceCube neutrino telescope. For first time, DeepCore sub-array is included analysis, lowering energy threshold and extending to austral summer. The 317 days data collected between June 2010 May 2011 are consistent expected background atmospheric muons neutrinos. Upper limits therefore set on rate, conversions spin-dependent spin-independent WIMP-proton cross-sections...
The nature of dark matter and properties neutrinos are among the most pressing issues in contemporary particle physics. dual-phase xenon time-projection chamber is leading technology to cover available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity many alternative candidates. These detectors can also study through neutrinoless double-beta decay a variety astrophysical sources. A next-generation xenon-based detector will therefore be...
A measurement of the atmospheric muon neutrino energy spectrum from 100 GeV to 400 TeV was performed using a data sample about 18 000 up-going events in IceCube. Boosted decision trees were used for event selection reject misreconstructed muons and obtain events. Background contamination final is less than 1%. This first neutrinos up TeV, fundamental understanding impact this background on astrophysical observations with The measured consistent predictions...
A search for muon neutrinos from neutralino annihilations in the Sun has been performed with IceCube 22-string neutrino detector using data collected 104.3 days of live time 2007. No excess over expected atmospheric background observed. Upper limits have obtained on annihilation rate captured neutralinos and converted to weakly interacting massive particle (WIMP) proton cross sections WIMP masses range 250-5000 GeV. These results are most stringent date Sun.
This paper describes the response of IceCube neutrino telescope located at geographic South Pole to outbursts MeV neutrinos from core collapse nearby massive stars. was completed in December 2010 forming a lattice 5160 photomultiplier tubes that monitor volume ~ 1 cubic kilometer deep Antarctic ice for particle induced photons. The designed detect with energies greater than 100 GeV. Owing subfreezing temperatures, dark noise rates are particularly low. Hence can also large numbers by...
We present the results of time-integrated searches for astrophysical neutrino sources in both northern and southern skies. Data were collected using partially completed IceCube detector 40-string configuration recorded between 2008 April 5 2009 May 20, totaling 375.5 days livetime. An unbinned maximum likelihood ratio method is used to search signals. The data sample contains 36,900 events: 14,121 from sky, mostly muons induced by atmospheric neutrinos, 22,779 high-energy muons. analysis...
We report the first observation of an anisotropy in arrival direction cosmic rays with energies multi TeV region Southern sky using data from IceCube detector. Between June 2007 and March 2008, partially-deployed detector was operated a configuration 1320 digital optical sensors distributed over 22 strings at depths between 1450 2450 meters inside Antarctic ice. is neutrino detector, but are dominated by large background ray muons. Therefore, suitable for high-statistics studies sky. The...
Keywords: neutrinos ; supernovae: general instrumentation: detectors errata addenda Reference EPFL-ARTICLE-198916doi:10.1051/0004-6361/201117810eView record in Web of Science Record created on 2014-05-19, modified 2017-05-12
Between 2009 May and 2010 May, the IceCube neutrino detector at South Pole recorded 32 billion muons generated in air showers produced by cosmic rays with a median energy of 20 TeV. With data set this size, it is possible to probe southern sky for per-mil anisotropy on all angular scales arrival direction distribution rays. Applying power spectrum analysis relative intensity map ray flux hemisphere, we show that not isotropic, but shows significant structure several scales. In addition...
We report on the observation of anisotropy in arrival direction distribution cosmic rays at PeV energies. The analysis is based data taken between 2009 and 2012 with IceTop air shower array south pole. IceTop, an integral part IceCube detector, sensitive to 100 TeV 1 EeV. With current size set, searches for 10−3 level can, first time, be extended divide set into two parts median energies 400 2 PeV, respectively. In low energy band, we observe a strong deficit angular about 30° amplitude (−...
IceCube has become the first neutrino telescope with a sensitivity below TeV flux predicted from gamma-ray bursts if are responsible for observed cosmic-ray above 10(18) eV. Two separate analyses using half-complete detector, one dedicated search neutrinos pγ interactions in prompt phase of burst fireball and other generic any emission these sources over wide range energies times, produced no evidence emission, excluding prevailing models at 90% confidence.
In this paper we report the first observation in Southern hemisphere of an energy dependence Galactic cosmic ray anisotropy up to a few hundred TeV. This measurement was performed using induced muons recorded by partially deployed IceCube observatory between May 2009 and 2010. The data include total 33$\times 10^{9}$ muon events with median angular resolution $\sim3^{\circ}$ degrees. A sky map relative intensity arrival direction over celestial is presented for energies 20 400 same...
The LUX-ZEPLIN (LZ) experiment is a dark matter detector centered on dual-phase xenon time projection chamber. We report searches for new physics appearing through few-keV-scale electron recoils, using the experiment's first exposure of 60 live days and fiducial mass 5.5 t. data are found to be consistent with background-only hypothesis, limits set models including solar axion coupling, neutrino magnetic moment millicharge, couplings galactic axionlike particles hidden photons. Similar...
The LUX-ZEPLIN experiment recently reported limits on WIMP-nucleus interactions from its initial science run, down to $6.5\times10^{-48}$ cm$^2$ for the spin-independent interaction of a 30 GeV/c$^2$ WIMP at 90% confidence level. In this paper, we present comprehensive analysis backgrounds important result and other upcoming physics analyses, including neutrinoless double-beta decay searches effective field theory interpretations data. We confirm that in-situ determinations bulk fixed...
Self-annihilating or decaying dark matter in the Galactic halo might produce high energy neutrinos detectable with neutrino telescopes. We have conducted a search for such signal using 276 days of data from IceCube 22-string configuration detector acquired during 2007 and 2008. The effect model choice extracted limit is reduced by performing that considers outer region not Center. constrain any large scale anisotropy are able to set on self-annihilation cross section <\sigma_{A}v> \simeq...
The IceCube Neutrino Observatory is a 1 km$^{3}$ detector currently taking data at the South Pole. One of main strategies used to look for astrophysical neutrinos with search diffuse flux high-energy from unresolved sources. A hard energy spectrum isotropically distributed sources could manifest itself as detectable signal that may be differentiated atmospheric neutrino background by spectral measurement. This analysis uses collected in its half completed configuration which operated between...
A search for TeV-PeV muon neutrinos from unresolved sources was performed on AMANDA-II data collected between 2000 and 2003 with an equivalent live time of 807 days. This diffuse analysis sought to find extraterrestrial neutrino flux nonthermal components. The signal is expected have a harder spectrum than the atmospheric backgrounds. Since no excess events seen in over background, upper limit...