A5083650757- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Astronomical Observations and Instrumentation
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Stellar, planetary, and galactic studies
- Information and Cyber Security
- Astronomy and Astrophysical Research
- Nuclear and radioactivity studies
- Scientific Research and Discoveries
- Muon and positron interactions and applications
- Network Security and Intrusion Detection
- Smart Grid Security and Resilience
South Dakota School of Mines and Technology
2010-2025
University of Delaware
2010-2013
The University of Tokyo
2011
Uppsala University
2006
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 search for an excess of muon neutrinos from dark matter annihilations in the Sun has been performed with AMANDA-II neutrino telescope using data collected 812 days live time between 2001 and 2006 149 40-string configuration IceCube during 2008 early 2009. No over expected atmospheric background observed. We combine these results previously published limits obtained taken 2007 to obtain a total 1065 days. provide upper limit at 90% confidence level on annihilation rate captured neutralinos...
We present the results of a first search for self-annihilating dark matter in nearby galaxies and galaxy clusters using sample high-energy neutrinos acquired 339.8 days live time during 2009/10 with IceCube neutrino observatory its 59-string configuration. The targets interest include Virgo Coma clusters, Andromeda galaxy, several dwarf galaxies. obtain upper limits on cross section as function weakly interacting massive particle mass between 300 GeV 100 TeV annihilation into...
Dual-phase xenon time projection chamber (TPC) detectors offer heightened sensitivities for dark matter detection across a spectrum of particle masses. To broaden their capability to low-mass interactions, we investigated the light and charge responses liquid (LXe) sub-keV nuclear recoils. Using neutron events from pulsed Adelphi Deuterium-Deuterium generator, an in situ calibration was conducted on LUX detector. We demonstrate direct measurements yields down 0.45 0.27 keV, respectively,...
Dark matter which is bound in the Galactic halo might self-annihilate and produce a flux of stable final state particles, e.g. high energy neutrinos. These neutrinos can be detected with IceCube, cubic-kilometer sized Cherenkov detector. Given IceCube's large field view, characteristic anisotropy additional neutrino expected. In this paper we describe multipole method to search for such large-scale IceCube data. This uses expansion coefficients arrival directions incorporates signal-specific...
We present a novel analysis technique for liquid xenon time projection chambers that allows lower threshold by relying on events with prompt scintillation signal consisting of single detected photons. The energy the LUX dark matter experiment is primarily determined smallest response detectable, which previously required twofold coincidence in its photomultiplier arrays, enforced data analysis. presented here exploits double photoelectron emission effect observed some models at vacuum...
Weakly Interacting Massive Particles (WIMPs) are a leading candidate for dark matter and expected to produce nuclear recoil (NR) events within liquid xenon time-projection chambers. We present measurement of the scintillation timing characteristics in LUX detector develop pulse shape discriminant be used particle identification. To accurately measure characteristics, we template-fitting method reconstruct detection times photons. Analyzing calibration data collected during 2013-16 WIMP...
A search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun has been performed with 22-string configuration of IceCube neutrino detector using data collected 104.3 days live-time 2007. No excess over expected atmospheric background observed. Upper limits have obtained on annihilation rate captured lightest particle (LKP) WIMPs and converted to LKP-proton cross-sections LKP masses range 250 -- 3000 GeV. These results are most stringent date Sun.
The LUX detector is currently in operation at the Davis Campus 4850' level of Sanford Underground Research Facility (SURF) Lead, SD to directly search for WIMP dark matter. Knowing type and rate backgrounds critical a rare, low energy event search, was designed, constructed, deployed mitigate backgrounds, both internal external. An important background are decays radon its daughters. These consist alpha decays, which easily tagged tracer certain beta some not as readily present search. We...
We report on searches for neutrino sources at energies above 200 GeV in the Northern sky of Galactic plane, using data collected by South Pole telescope, IceCube, and AMANDA. The region considered this work includes local arm toward Cygnus our closest approach to Perseus Arm. are based between 2007 2009. During time AMANDA was an integrated part which still under construction operated with 22 strings (2007–2008) 40 (2008–2009) optical modules deployed ice. By combining advantages larger...
The Large Underground Xenon (LUX) dark matter search was a 250-kg active mass dual-phase time projection chamber that operated by detecting light and ionization signals from particles incident on xenon target. In December 2015, LUX reported minimum 90% upper C.L. of 6×10−46 cm2 the spin-independent WIMP-nucleon elastic scattering cross section based 1.4×104 kg⋅day exposure in its first science run. Tension between experiments absence definitive positive detection suggest it would be prudent...
Papers on atmospheric and diffuse UHE neutrino searches of all flavors submitted to the 33nd International Cosmic Ray Conference (Rio de Janeiro 2013) by IceCube Collaboration.
Papers on neutrino oscillations and supernova searches submitted to the 34th International Cosmic Ray Conference (ICRC 2015, The Hague) by IceCube Collaboration.
We report on a measurement of astrophysical tau neutrinos with 9.7 years IceCube data. Using convolutional neural networks trained images derived from simulated events, seven candidate $\nu_\tau$ events were found visible energies ranging roughly 20 TeV to 1 PeV and median expected parent energy about 200 TeV. Considering backgrounds atmospheric neutrinos, muons $\pi^\pm/K^\pm$ decays in air showers, we obtain total estimated background 0.5 dominated by non-$\nu_\tau$ neutrinos. Thus, rule...
The current network security situation of industrial control systems is becoming increasingly severe, and the ICS ATT&CK framework provides a unified knowledge base for attack tactics techniques system security. This paper presents RRDD model risk assessment ICS, which consists four parts: Risk identification (R), calculation Defense strategy (D), measures (D). based on to analyze indicators clarify vulnerability system, importance assets, threats faced existing mitigation measures. analysis...
We present the status and prospects of LUX experiment, which employs approximately 300 kg two-phase xenon to search for WIMP dark matter interactions.The detector was commissioned at surface laboratory Sanford Underground Research Facility in Lead, SD, between December 2011 February 2012 has been operating underground since January, 2013.These proceedings review results commissioning run as well data-taking through summer 2013.