A5027681082- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Advanced Chemical Physics Studies
- Electron and X-Ray Spectroscopy Techniques
- Advanced NMR Techniques and Applications
- Atomic and Molecular Physics
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Inorganic Fluorides and Related Compounds
- Particle Detector Development and Performance
- Quantum Mechanics and Applications
- Quantum Information and Cryptography
- Advanced Frequency and Time Standards
University of Illinois Urbana-Champaign
2015-2024
University of Illinois Chicago
2023
Osaka University
2018
The University of Tokyo
2018
Kyoto University
2018
Nagoya University
2018
Tohoku University
2018
University of Illinois System
2018
Bellingham Technical College
2016
Stanford University
2012
A search for neutrinoless double-beta decay ($0\nu\beta\beta$) in $^{136}$Xe is performed with the full EXO-200 dataset using a deep neural network to discriminate between $0\nu\beta\beta$ and background events. Relative previous analyses, signal detection efficiency has been raised from 80.8% 96.4$\pm$3.0% energy resolution of detector at Q-value improved $\sigma/E=1.23\%$ $1.15\pm0.02\%$ upgraded detector. Accounting new data, median 90% confidence level half-life sensitivity this analysis...
Results from a search for neutrinoless double-beta decay (0νββ) of ^{136}Xe are presented using the first year data taken with upgraded EXO-200 detector. Relative to previous searches by EXO-200, energy resolution detector has been improved σ/E=1.23%, electric field in drift region raised 50%, and system suppress radon volume between cryostat lead shielding implemented. In addition, analysis techniques that improve topological discrimination 0νββ background events have developed....
We report on an improved measurement of the $2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ half-life ${}^{136}$Xe performed by EXO-200. The use a large and homogeneous time-projection chamber allows for precise estimate fiducial mass used measurement, resulting in small systematic uncertainty. also discuss detail data-analysis methods double-$\ensuremath{\beta}$ decay searches with EXO-200, while emphasizing those directly related to present measurement. is found be...
We have measured parity-violating asymmetries in elastic electron-proton and quasielastic electron-deuteron scattering at ${Q}^{2}=0.22$ $0.63\text{ }\text{ }{\mathrm{GeV}}^{2}$. They are sensitive to strange quark contributions currents the nucleon axial-vector current. The results indicate of $\ensuremath{\lesssim}10%$ charge magnetic form factors these four-momentum transfers. also present first measurement anapole moment effects current
The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double beta ($0\nu\beta\beta$) decay in $^{136}$Xe with target half-life sensitivity of approximately $10^{28}$ years using $5\times10^3$ kg isotopically enriched liquid-xenon time projection chamber. This improvement two orders magnitude over current limits obtained by significant increase the mass, monolithic and homogeneous configuration active medium, multi-parameter measurements...
The projected performance and detector configuration of nEXO are described in this pre-Conceptual Design Report (pCDR). is a tonne-scale neutrinoless double beta ($0νββ$) decay search $^{136}$Xe, based on the ultra-low background liquid xenon technology validated by EXO-200. With $\simeq$ 5000 kg enriched to 90% isotope 136, has half-life sensitivity approximately $10^{28}$ years. This represents an improvement about two orders magnitude with respect current results. Based experience gained...
We report the first measurement of parity-violating asymmetry in elastic electron scattering from proton. The depends on neutral weak magnetic form factor proton which contains new information contribution strange quark-antiquark pairs to moment obtain value ${G}_{M}^{Z}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.34\ifmmode\pm\else\textpm\fi{}0.09\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.05\mathrm{n}.\mathrm{m}.$ at...
Aims. The detection and measurement of gravitational-waves from coalescing neutron-star binary systems is an important science goal for ground-based gravitational-wave detectors. In addition to emitting at frequencies that span the most sensitive bands LIGO Virgo detectors, these sources are also amongst likely produce electromagnetic counterpart emission. A joint signals would provide a powerful new probe astronomy. Methods. During period between September 19 October 20, 2010, first...
A versatile and portable magnetically shielded room with a field of (700 ± 200) pT within central volume 1 m × gradient less than 300 pT/m, achieved without any external stabilization or compensation, is described. This performance represents more hundredfold improvement the state art for two-layer magnetic shield provides an environment suitable next generation precision experiments in fundamental physics at low energies; particular, searches electric dipole moments systems tests...
The violation of mirror symmetry in the weak force provides a powerful tool to study internal structure proton. Experimental results have been obtained that address role strange quarks generating nuclear magnetism. measurement reported here an unambiguous constraint on quark contributions proton's magnetic moment through electron-proton interaction. We also report evidence for existence parity-violating electromagnetic effect known as anapole is not yet well understood theoretically, but it...
We report a new measurement of the parity-violating asymmetry in elastic electron scattering from proton at backward angles. This is sensitive to strange magnetic form factor as well electroweak axial radiative corrections. The A = -4.92+/-0.61+/-0.73 ppm provides significant constraint on these quantities. implications for are discussed context theoretical estimates
Longitudinal response functions for H3 and He3 have been obtained from inclusive electron scattering cross sections, 200≤q≤550 MeV/c. The are compared with several theoretical calculations, all of which use exact three-body ground-state wave functions. found to be more similar than the calculations predict. When a direct calculation Coulomb sum rule is our data, agreement good evidence two-proton correlations in clear.Received 9 March 1988DOI:https://doi.org/10.1103/PhysRevLett.61.1706©1988...
The tensor polarization t20 of the recoil deuteron in elastic e-d scattering has been measured for three values four-momentum transfer, q=3.78, 4.22, and 4.62 fm−1. data have used to locate first node charge monopole form factor at q=4.39±0.16 results are reasonable agreement with expectations based on nucleon-meson description nuclear dynamics.Received 28 May 1991DOI:https://doi.org/10.1103/PhysRevLett.67.173©1991 American Physical Society
We present a magnetically shielded environment with damping factor larger than 1 × 106 at the mHz frequency regime and an extremely low field gradient over extended volume. This extraordinary shielding performance represents improvement of state-of-the-art in difficult very low-frequency distortions by more order magnitude. technology enables new generation high-precision measurements fundamental physics metrology, including searches for far beyond reach accelerator-based experiments....
A search for Lorentz- and $CPT$-violating signals in the double beta decay spectrum of $^{136}\mathrm{Xe}$ has been performed using an exposure $100\text{ }\text{ }\mathrm{kg}\ifmmode\cdot\else\textperiodcentered\fi{}\mathrm{yr}$ with EXO-200 detector. No significant evidence spectral modification due to isotropic Lorentz-violation was found, a two-sided limit $\ensuremath{-}2.65\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}\text{...
A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with major improvement in sensitivity compared to the existing limit search for neutron Electric Dipole Moment (EDM). This uses superfluid 4He produce high density of Ultra-Cold Neutrons (UCN) which are contained suitably coated pair measurement cells. The be operated at Spallation Neutron Source Oak Ridge National Laboratory, polarized 3He from an Atomic Beam injected into and transported cells where it serves as...
Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well those reached directly at high energy colliders. Discrimination between different models, however, requires complementary searches in atomic-molecular-and-optical, nuclear and particle physics. In this report, we discuss current status prospects near future a compelling suite such experiments, along with developments needed encompassing theoretical framework.
The quasielastic ${(e,e}^{\ensuremath{'}}p)$ reaction was studied on targets of deuterium, carbon, and iron up to a value momentum transfer ${Q}^{2}$ $8.1(\mathrm{GeV}{/c)}^{2}.$ A nuclear transparency determined by comparing the data calculations in plane-wave impulse approximation. dependence mass number investigated search for onset color phenomenon. We find no evidence within our range ${Q}^{2}.$ fit world's reflects energy free-proton--nucleon cross section.
We present the first multi-wavelength follow-up observations of two candidate gravitational-wave (GW) transient events recorded by LIGO and Virgo in their 2009-2010 science run. The were selected with low latency network GW detectors sky locations observed Swift observatory. Image detection was used to analyze collected electromagnetic data, which found be consistent background. Off-line analysis data alone has also established that show no evidence an astrophysical origin; one them is...
We present the results of a weakly modeled burst search for gravitational waves from mergers non-spinning intermediate mass black holes (IMBH) in total range 100--450 solar masses and with component ratios between 1:1 4:1. The was conducted on data collected by LIGO Virgo detectors November 2005 October 2007. No plausible signals were observed which constrains astrophysical rates IMBH as function masses. In most efficiently detected bin centered 88+88 masses, sources, rate density upper...
EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of $^{136}$Xe. Here we report on various Majoron-emitting modes based 100 kg$\cdot$yr exposure A lower limit $T^{^{136}Xe}_{1/2} >1.2 \cdot 10^{24}$ yr at 90% C.L. the half-life spectral index = 1 Majoron was obtained, corresponding constraint Majoron-neutrino coupling constant $|< g^{M}_{ee} >|<$ (0.8-1.7)$\cdot$10$^{-5}$.
We report the design and performance of a nonmagnetic drift stable optically pumped cesium magnetometer with measured sensitivity 35 fT at 200 s integration time stability below 50 between 70 600 s. The sensor is based on nonlinear magneto-optical rotation effect: in Bell–Bloom configuration, higher order polarization moment (alignment) Cs atoms created pump laser beam an anti-relaxation coated Pyrex cell under vacuum, filled vapor room temperature. plane light passing through modulated due...
The many-body entanglement between two finite (size-$d$) disjoint vacuum regions of noninteracting lattice scalar field theory in one spatial dimension, i.e., a ${({d}_{A}\ifmmode\times\else\texttimes\fi{}{d}_{B})}_{\mathrm{mixed}}$ Gaussian continuous variable system, is locally transformed into tensor-product core ${({1}_{A}\ifmmode\times\else\texttimes\fi{}{1}_{B})}_{\mathrm{mixed}}$ entangled pairs. Accessible within these pairs exhibits an exponential hierarchy and as such identifies...