A5015824633- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Muon and positron interactions and applications
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Biodiesel Production and Applications
- Advanced Combustion Engine Technologies
- Quantum Chromodynamics and Particle Interactions
- Heat transfer and supercritical fluids
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Fluid Dynamics and Turbulent Flows
- Particle accelerators and beam dynamics
- Fluid Dynamics and Vibration Analysis
- Particle Accelerators and Free-Electron Lasers
- Scientific Research and Discoveries
- Noncommutative and Quantum Gravity Theories
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Lattice Boltzmann Simulation Studies
- Vehicle emissions and performance
- Aerodynamics and Fluid Dynamics Research
Trường ĐH Nguyễn Tất Thành
2018-2024
Vietnam National University Ho Chi Minh City
2022
Bandung Institute of Technology
2014-2018
Ho Chi Minh City University of Technology
2016
University of Minnesota System
1999-2011
University of Minnesota
2000-2011
Twin Cities Orthopedics
2005
Boston University
1998
We present the final report from a series of precision measurements muon anomalous magnetic moment, ${a}_{\ensuremath{\mu}}=(g\ensuremath{-}2)/2$. The details experimental method, apparatus, data taking, and analysis are summarized. Data obtained at Brookhaven National Laboratory, using nearly equal samples positive negative muons, were used to deduce ${a}_{\ensuremath{\mu}}(\mathrm{\text{Expt}})=11659208.0(5.4)(3.3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$, where...
The anomalous magnetic moment of the negative muon has been measured to a precision 0.7 ppm (ppm) at Brookhaven Alternating Gradient Synchrotron. This result is based on data collected in 2001, and over an order magnitude more precise than previous measurement for muon. a(mu(-))=11 659 214(8)(3) x 10(-10) (0.7 ppm), where first uncertainty statistical second systematic, consistent with measurements anomaly positive average a(mu)(exp)=11 208(6) (0.5 ppm).
We report results from a blind analysis of the final data taken with Cryogenic Dark Matter Search experiment (CDMS II) at Soudan Underground Laboratory, Minnesota, USA. A total raw exposure 612 kg-days was analyzed for this work. observed two events in signal region; based on our background estimate, probability observing or more is 23%. These set an upper limit Weakly Interacting Massive Particle (WIMP)-nucleon elastic-scattering spin-independent cross-section 7.0x10^{-44} cm^2 WIMP mass 70...
A precise measurement of the anomalous g value, a(mu) = (g-2)/2, for positive muon has been made at Brookhaven Alternating Gradient Synchrotron. The result a(mu+) 11 659 202(14) (6) x 10(-10) (1.3 ppm) is in good agreement with previous measurements and an error one third that combined data. current theoretical value from standard model a(mu)(SM) 159.6(6.7) (0.57 a(mu)(exp) - 43(16) which world average experimental value.
We report results from a reanalysis of data the Cryogenic Dark Matter Search (CDMS II) experiment at Soudan Underground Laboratory. Data taken between October 2006 and September 2008 using eight germanium detectors are reanalyzed with lowered, 2 keV recoil-energy threshold, to give increased sensitivity interactions weakly interacting massive particles (WIMPs) masses below ∼10 GeV/c(2). This analysis provides stronger constraints than previous CDMS II for WIMP 9 GeV/c(2) excludes parameter...
We report first results from the Cryogenic Dark Matter Search (CDMS II) experiment running with its full complement of 30 cryogenic particle detectors at Soudan Underground Laboratory. This is based on analysis data acquired between October 2006 and July 2007 15 Ge (3.75 kg), giving an effective exposure 121.3 kg-d (averaged over recoil energies 10--100 keV, weighted for a weakly interacting massive (WIMP) mass 60 \gev). A blind analysis, incorporating improved techniques event...
Three independent searches for an electric dipole moment (EDM) of the positive and negative muons have been performed, using spin precession data from muon g-2 storage ring at Brookhaven National Laboratory. Details on experimental apparatus three analyses are presented. Since individual results muon, as well combined result, d=-0.1(0.9)E-19 e-cm, all consistent with zero, we set a new EDM limit, |d| < 1.9E-19 e-cm (95% C.L.). This represents factor 5 improvement over previous best limit EDM.
We report new results from the Cryogenic Dark Matter Search (CDMS II) at Soudan Underground Laboratory. Two towers, each consisting of six detectors, were operated for 74.5 live days, giving spectrum-weighted exposures 34 (12) kg d Ge (Si) targets after cuts, averaged over recoil energies 10--100 keV a weakly interacting massive particle (WIMP) mass $60\text{ }\text{ }\mathrm{GeV}/{c}^{2}$. A blind analysis was conducted, incorporating improved techniques rejecting surface events. No WIMP...
A higher precision measurement of the anomalous g value, a(mu)=(g-2)/2, for positive muon has been made at Brookhaven Alternating Gradient Synchrotron, based on data collected in year 2000. The result a(mu(+))=11 659 204(7)(5)x10(-10) (0.7 ppm) is good agreement with previous measurements and an error about one-half that combined data. present world average experimental value a(mu)(expt)=11 203(8)x10(-10) ppm).
We report the first results from a search for weakly interacting massive particles (WIMPs) in Cryogenic Dark Matter Search experiment at Soudan Underground Laboratory. Four Ge and two Si detectors were operated 52.6 live days, providing 19.4 kg d of net exposure after cuts recoil energies between 10 100 keV. A blind analysis was performed using only calibration data to define energy threshold selection criteria nuclear-recoil candidates. Using standard dark-matter halo nuclear-physics WIMP...
Received 22 August 2002DOI:https://doi.org/10.1103/PhysRevLett.89.129903©2002 American Physical Society
The Cryogenic Dark Matter Search (CDMS-II) employs low-temperature Ge and Si detectors to seek Weakly Interacting Massive Particles (WIMPs) via their elastic scattering interactions with nuclei. Simultaneous measurements of both ionization phonon energy provide discrimination against background particles. For recoil energies above 10 keV, events due photons are rejected >99.99% efficiency. Electromagnetic very near the detector surface can mimic nuclear recoils because reduced charge...
We report on the first axion search results from Cryogenic Dark Matter Search (CDMS) experiment at Soudan Underground Laboratory. An energy threshold of 2 keV for electron-recoil events allows a possible solar conversion into photons or local galactic electrons in germanium crystal detectors. The sets an upper limit Primakov coupling ${g}_{a\ensuremath{\gamma}\ensuremath{\gamma}}$ $2.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}\text{ }\text{ }{\mathrm{GeV}}^{\ensuremath{-}1}$...
Using improved Ge and Si detectors, better neutron shielding, increased counting time, the Cryogenic Dark Matter Search (CDMS) experiment has obtained stricter limits on cross section of weakly interacting massive particles (WIMPs) elastically scattering from nuclei. Increased discrimination against electromagnetic backgrounds reduction flux confirm WIMP-candidate events previously detected by CDMS were consistent with neutrons give spin-independent WIMP interactions which are >2X lower than...
The Cryogenic Dark Matter Search (CDMS) is an experiment to detect weakly interacting massive particles (WIMPs), which may constitute the universe's dark matter, based on their interactions with Ge and Si nuclei. We report results of analysis data from first two runs CDMS at Soudan Underground Laboratory in terms spin-dependent WIMP-nucleon $^{73}\mathrm{Ge}$ $^{29}\mathrm{Si}$. These exclude new regions WIMP parameter space, including relevant interpretations annual modulation signal...
The muon anomalous magnetic moment has been measured in a new experiment at Brookhaven. Polarized muons were stored superferric ring, and the angular frequency difference, ${\ensuremath{\omega}}_{a}$, between spin precession orbital frequencies was determined by measuring time distribution of high-energy decay positrons. ratio $R$ ${\ensuremath{\omega}}_{a}$ to Larmor free protons, ${\ensuremath{\omega}}_{p}$, storage-ring field measured. We find...
The spin precession frequency of muons stored in the $(g-2)$ storage ring has been analyzed for evidence Lorentz and CPT violation. Two violation signatures were searched for: a nonzero $\Delta\omega_{a}$ (=$\omega_{a}^{\mu^{+}}-\omega_{a}^{\mu^{-}}$); sidereal variation $\omega_{a}^{\mu^{\pm}}$. No significant effect is found, following limits on standard-model extension parameters are obtained: $b_{Z} =-(1.0 \pm 1.1)\times 10^{-23}$ GeV; $(m_{\mu}d_{Z0}+H_{XY}) = (1.8 6.0 \times 10^{-23})$...
A new measurement of the positive muon's anomalous magnetic moment has been made at Brookhaven Alternating Gradient Synchrotron using direct injection polarized muons into superferric storage ring. The angular frequency difference ${\ensuremath{\omega}}_{a}$ between spin precession ${\ensuremath{\omega}}_{s}$ and orbital ${\ensuremath{\omega}}_{c}$ is measured as well free proton NMR ${\ensuremath{\omega}}_{p}.$ These determine...
Wake transitions of flow past two tandem semi-circular cylinders near a moving wall were numerically investigated using the lattice Boltzmann method at Reynolds number 150 with various gap ratios (G/D, where G and D are spacing between cylinder diameter, respectively) (L/D, L is distance centers). The analysis aims to clarify effects L/D G/D on wake structures, hydrodynamic forces, Strouhal number, spectral energy exerted both cylinders. This study reveals five distinct regimes in L/D-G/D...
A simple round jet is perturbed by attaching either a stepped or sawtooth trailing edge that acts as form of passive control. Flow visualization, laser Doppler anemometer, and hot-wire measurements are used to document the flow behavior in both water air for Reynolds numbers 7600 22 000, respectively. When forced, bifurcates. The bifurcation requires low forcing frequency encourages formation tilted primary vortex rings with significant vorticity axial spacing. In step nozzle flow, result...
We report on the analysis of low-energy electron-recoil spectrum from CDMS II experiment using data with an exposure 443.2 kg-days. The provides details observed counting rate and possible background sources in energy range 2--8.5 keV. find no significant excess a peaked contribution to total above model, compare this observation recent DAMA results. In framework conversion dark matter particle into electromagnetic energy, our 90% confidence level upper limit $0.246\text{ }\text{...
Results are presented from a reanalysis of the entire five-tower data set acquired with Cryogenic Dark Matter Search (CDMS II) experiment at Soudan Underground Laboratory, an exposure 969 kg-days. The analysis window was extended to recoil energy 150 keV, and improved surface-event background-rejection cut defined increase sensitivity inelastic dark matter (iDM) model. Three candidates were found between 25 keV keV. probability observe three or more background events in this range is 11%....
The smoke point of several fuel mixtures was measured using a meter defined by American Society for Testing Material D1322. threshold soot index (TSI) calculated to compare the sooting tendency fuels. Two aviation biofuels produced hydroprocessing coconut oil, four jet range normal paraffins (n-paraffins), iso-octane, and propylbenzene were used investigate effects chain length n-paraffins, iso-paraffins, aromatics on tendency. results show that effect is dominant compared n-paraffins...