A5114376112- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Radiation Detection and Scintillator Technologies
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- advanced mathematical theories
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- CCD and CMOS Imaging Sensors
- Nuclear physics research studies
- Nuclear reactor physics and engineering
- Gamma-ray bursts and supernovae
University of Hawaiʻi at Mānoa
2014-2024
High Energy Accelerator Research Organization
2005-2024
Wayne State University
2023-2024
University of Hawaii System
2014-2023
University of Bonn
2013-2022
University of the Basque Country
2013-2022
Chonnam National University
2019-2022
Lawrence Berkeley National Laboratory
2005-2020
Beihang University
2014-2019
University of Cincinnati
2001-2019
The status of the research on muon colliders is discussed and plans are outlined for future theoretical experimental studies. Besides continued work parameters a 3-4 0.5 TeV center-of-mass (CoM) energy collider, many studies now concentrating machine near 0.1 that could be factory s-channel production Higgs particles. We discuss various components in such colliders, starting from proton accelerator needed to generate pions heavy-Z target proceeding through phase rotation decay ($\pi \to \mu...
The addition of O2 to gas mixtures in time projection chambers containing CS2 has recently been shown produce multiple negative ions that travel at slightly different velocities. This allows a measurement the absolute position ionising events z (drift) direction. In this work, we apply z-fiducialisation technique directional dark matter search. We present results from 46.3 live-day source-free exposure DRIFT-IId detector run new mode. With full-volume fiducialisation, have achieved first...
Now that conventional weakly interacting massive particle (WIMP) dark matter searches are approaching the neutrino floor, there has been a resurgence of interest in detectors with sensitivity to nuclear recoil directions. A large-scale directional detector is attractive it would have below be capable unambiguously establishing galactic origin purported signal, and could serve dual purpose as observatory. We present first detailed analysis 1000 m$^3$-scale measuring signal at low energies....
Searches for dark matter-induced recoils have made impressive advances in the last few years. Yet field is confronted by several outstanding problems. First, inevitable background of solar neutrinos will soon inhibit conclusive identification many matter models. Second, and more fundamentally, current experiments no practical way confirming a detected signal's galactic origin. The concept directional detection addresses both these issues while offering opportunities to study novel...
Low-energy electron recoils are of interest in several planned and proposed future nuclear particle physics experiments. The topology directions such provide important identification kinematical constraints, experimentally accessible gaseous targets. Electron have complex trajectories, the angular resolution that can be achieved has not been well understood. We developed a method for estimating optimizing this resolution, considering contributions from both multiple scattering detection....
Gas-filled Time Projection Chambers (TPCs) with Gas Electron Multipliers (GEMs) and pixels appear suitable for direction-sensitive WIMP dark matter searches. We present the background motivation our work on this technology, past ongoing prototype work, a development path towards an affordable, 1-m3-scale directional detector, D3. Such detector may be particularly low-mass searches, perhaps sufficiently sensitive to clearly determine whether signals seen by DAMA, CoGeNT, CRESST-II are due...
We report preliminary results on the analysis of three-body Y(10860)=> B barB pi, Y(10860) => (B barB* + c.c.) pi and B* decays including an observation Zb(10610)+- pi-+ [B barB*+c.c]+- Zb(10650)+- [B* barB*]+- as intermediate channels. measure branching fractions to be Br(Y(10860)=> barB*+c.c.]+- pi-+)=(28.3+-2.9+-4.6)x10^{-3} pi-+)=(14.1+-1.9+-2.4)x10^{-3} set 90% C.L. upper limit barB]+- pi-+)<4.0x10^{-3}. also amplitude Y(10860)=>Y(nS)pi+pi-, n=1,2,3 internal structure...
We report on the first Belle search for a light CP-odd Higgs boson, A^{0}, that decays into low mass dark matter, χ, in final states with single photon and missing energy. events produced via dipion transition ϒ(2S)→ϒ(1S)π^{+}π^{-}, followed by on-shell process ϒ(1S)→γA^{0} A^{0}→χχ, or off-shell ϒ(1S)→γχχ. Utilizing data sample of 157.3×10^{6} ϒ(2S) decays, we find no evidence signal. set limits branching fractions such processes ranges M_{A^{0}}<8.97 GeV/c^{2} M_{χ}<4.44 GeV/c^{2}. then...
Mitigation of beam backgrounds via collimators is critical for the success Belle II experiment at SuperKEKB electron-positron collider. We report on an improved simulation methodology, which includes a refined physical description and pipe, our first implementation collimator tip scattering, in existing particle tracking software has been embedded into new sequential framework. These improvements resolve longstanding discrepancies between measured predicted background levels, significantly...
We report a measurement of the time-integrated $CP$ asymmetry in neutral charm meson decay $D^0 \to K^0_S K^0_S$ using 921~fb$^{-1}$ data collected at $Υ(4S)$ and $Υ(5S)$ resonances with Belle detector KEKB asymmetric-energy $e^+e^-$ collider. The observed is $$ A_{CP}(D^0 K^0_S) = (-0.02 \pm 1.53 0.17) \%, where first uncertainty statistical second systematic. This latter dominated by error normalisation channel. result consistent Standard Model expectations improves respect to previous...
Abstract We present the first method to probabilistically predict 3D direction in a deep neural network model. The probabilistic predictions are modeled as heteroscedastic von Mises-Fisher distribution on sphere <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msup> <mml:mi mathvariant="double-struck">S</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msup> </mml:math> , giving simple way quantify aleatoric uncertainty. This approach generalizes cosine...