A5050412263- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Muon and positron interactions and applications
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Physics of Superconductivity and Magnetism
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Quantum, superfluid, helium dynamics
- Atomic and Molecular Physics
- Superconducting Materials and Applications
- Mass Spectrometry Techniques and Applications
- Inorganic Fluorides and Related Compounds
- Cosmology and Gravitation Theories
- Lung Cancer Diagnosis and Treatment
- Radiomics and Machine Learning in Medical Imaging
- Radiation Effects in Electronics
- Magnetic Properties and Applications
- Field-Flow Fractionation Techniques
- Spacecraft and Cryogenic Technologies
- Computational Physics and Python Applications
- High-Energy Particle Collisions Research
High Energy Accelerator Research Organization
2012-2023
The University of Tokyo
2006-2020
Institute for Basic Science
2018-2019
Institute of Particle and Nuclear Studies
2015
Paul Scherrer Institute
2011-2013
Niigata University
2002
The analysis of a combined data set, totaling 3.6 × 10(14) stopped muons on target, in the search for lepton flavor violating decay μ(+) → e(+)γ is presented. collected by MEG experiment at Paul Scherrer Institut show no excess events compared to background expectations and yield new upper limit branching ratio this 5.7 10(-13) (90% confidence level). This represents four times more stringent than previous world best set MEG.
We present a new result based on an analysis of the data collected by MEG detector at Paul Scherrer Institut in 2009 and 2010, search lepton-flavor-violating decay μ+→e+γ. The likelihood combined sample, which corresponds to total 1.8×1014 muon decays, gives 90% C.L. upper limit 2.4×10−12 branching ratio μ+→e+γ decay, constituting most stringent existence this date.Received 31 July 2011DOI:https://doi.org/10.1103/PhysRevLett.107.171801© 2011 American Physical Society
The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 search for decay μ +→e+ γ by using one of most intense continuous + beams in world. This paper presents components: positron spectrometer, including a thin target, superconducting magnet, set drift chambers measuring muon vertex and momentum, timing counter time, liquid xenon detector photon energy, position time. trigger system, read-out electronics data acquisition system...
Abstract We present the first direct search for lepton flavour violating muon decay mediated by a new light particle X, $$\upmu ^+ \rightarrow \mathrm {e}^+\mathrm {X}, {X} \upgamma \ $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mi>μ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:mi>e</mml:mi> </mml:mrow> <mml:mi>X</mml:mi> <mml:mo>,</mml:mo> <mml:mi>γ</mml:mi> <mml:mspace /> </mml:math> . This uses dataset resulting from...
The axion, a consequence of the PQ mechanism, has been considered as most elegant solution to strong-CP problem and compelling candidate for cold dark matter. Center Axion Precision Physics Research (CAPP) Institute Basic Science (IBS) was established on 16 October 2013 with main objective launch state art axion experiments in South Korea. Relying haloscope technique, our strategy is run several parallel explore wide range masses sensitivities better than QCD models. We utilize not only...
A new experiment, called DeeMe, which is designed to search for μ−e conversions with a sensitivity of O(10−14), in preparation at the Japan Proton Accelerator Research Complex (J-PARC). It utilizes high-quality pulsed proton beam from Rapid Cycling Synchrotron J-PARC. The detector DeeMe must tolerate large pulses prompt charged particles whose instantaneous hit rate as 70 GHz mm−2 time width 200 ns, and detect single electron that arrives delayed timing on order microseconds. special wire...
High-energy physics experiments must usually handle large transfer rates of experimental data. In particular, in recent years, the amount and speed data handled high-energy have significantly increased, because signal waveforms from detectors are often recorded without reduction to maximize flexibility offline analysis. To best exploit available bandwidth such acquisition systems with waveform recording, we developed real-time lossless waveform-compression firmware that is based on a...
Charged lepton flavor violation (CLFV) is a good probe for new physics beyond the standard model of elementary particle physics. The DeeMe experiment going to search one CLFV processes, mu-e conversion in nuclear field, with sensitivity $10^{-14}$, ten times better than current limits. utilizes fast-extracted proton beam from Rapid Cycling Synchrotron (RCS) J-PARC and production target Materials Life Science Experimental Facility (MLF) as material that muonic atoms are formed. overview...
Abstract At J-PARC MUSE, since the µ SR2017 conference and up to FY2022, there have been several new developments at facility, including completion of a experimental area S2 surface muon beamline S-line first beam extraction H1 in H-line, mainly carry out high-statistics fundamental physics experiments. Several studies are also underway, such as applying negative non-destructive elemental analysis samples returned from asteroid Ryugu D2 D-line. This paper reports on latest status MUSE.
We are developing Pixelated Photon Detector (PPD) sensitive to deep UV scintillation photons of liquid xenon as a possible candidate for the photosensor upgrade MEG γ-ray detector.The prototypes PPD preliminarily optimized detection were tested in LXe and their basic properties measured.The measured performance is described.
Negative muon is utilized as a good probe not only in the elementary particle physics, but also non-destructive elemental analysis. Developments of slow negative beam are on going J-PARC to make more sophisticated Beam tuning down 2.6 MeV/c achieved by detecting directly with micro-channel plate. Ultra be developed novel technique utilizing muon-catalyzed fusion.
Elementary particle physics explores a fundamental principle of the nature mainly by two means, energy frontier and intensity frontier.On side high frontier, experiments using beam gives possibility to produce examine new particles.On intense opportunity precisely measure parameters known elementary particles search for undiscovered rare reactions.Muon is playing one most important roles in upper limits on branching fraction µ → eγ decay given MEG experiment continuous muon at PSI made...
It is considered that muon-electron conversion would be one of the most obvious evidence new physics beyond standard model.An experimental search for in nuclear field, DeeMe, proposed at J-PARC Materials and Life Science Experimental Facility (MLF).DeeMe experiment will carried out a brand-new beamline (H-Line) which constructed MLF Muon Establishment (MUSE).The single event sensitivity achieved by with current graphite production target MUSE estimated to 1.2 × 10 -13 .This smaller than...