K. Choi
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View article: Search for neutron decay into an antineutrino and a neutral kaon in 0.401 megaton-years exposure of Super-Kamiokande
Search for neutron decay into an antineutrino and a neutral kaon in 0.401 megaton-years exposure of Super-Kamiokande Open
We searched for bound neutron decay via n → ν ¯ + K 0 predicted by the grand unified theories in 0.401 Mton · years exposure of all pure water phases in the Super-Kamiokande detector. About 4.4 times more data than in the pre…
View article: Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande
Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande Open
We present measurements of total neutron production from atmospheric neutrino interactions in water, analyzed as a function of electron-equivalent visible energy over a range of 30 MeV to 10 GeV. These results are based on 4,270 days of da…
View article: Transverse Emittance Reduction in Muon Beams by Ionization Cooling
Transverse Emittance Reduction in Muon Beams by Ionization Cooling Open
Accelerated muon beams have been considered for next-generation studies of high-energy lepton-antilepton collisions and neutrino oscillations. However, high-brightness muon beams have not yet been produced. The main challenge for muon acce…
View article: The Hyper-Kamiokande Experiment: design, status of construction and physics goals
The Hyper-Kamiokande Experiment: design, status of construction and physics goals Open
Hyper-Kamiokande (HK) is the next generation water Cherenkov detector being constructed in Japan, following in the footsteps of the very successful Kamiokande, Super-Kamiokande and T2K experiments. The HK far detector (258\,kton) is planne…
View article: Multiple Coulomb scattering of muons in lithium hydride
Multiple Coulomb scattering of muons in lithium hydride Open
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View article: Multiple Coulomb Scattering of muons in Lithium Hydride
Multiple Coulomb Scattering of muons in Lithium Hydride Open
Multiple Coulomb Scattering (MCS) is a well known phenomenon occurring when charged particles traverse materials. Measurements of muons traversing low $Z$ materials made in the MuScat experiment showed that theoretical models and simulatio…
View article: Performance of the LHCb RICH detectors during LHC Run 2
Performance of the LHCb RICH detectors during LHC Run 2 Open
The performance of the ring-imaging Cherenkov detectors at the LHCb experiment is determined during the LHC Run 2 period between 2015 and 2018. The stability of the Cherenkov angle resolution and number of detected photons with time and ru…
View article: Performance of the MICE diagnostic system
Performance of the MICE diagnostic system Open
Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams of a neutrino factory and for multi-TeV lepton-antilepton collisions at a muon collider. The international Muon Ionization Cooling Experiment …
View article: First Demonstration of Ionization Cooling by the Muon Ionization Cooling Experiment
First Demonstration of Ionization Cooling by the Muon Ionization Cooling Experiment Open
Muon colliders have the potential to carry the search for new phenomena to energies well beyond the reach of the LHC in the same or smaller footprint. Muon beams may be created through the decay of pions produced in the interaction of a pr…
View article: Baby MIND Readout Electronics Architecture for Accelerator Neutrino Particle Physics Detectors Employing Silicon Photomultipliers
Baby MIND Readout Electronics Architecture for Accelerator Neutrino Particle Physics Detectors Employing Silicon Photomultipliers Open
The Baby MIND neutrino particle detector was installed at J-PARC in Tokai Japan in February 2018 and commissioned with first neutrino beam a few weeks later. It is instrumented with 3,996 Hamamatsu MPPCs type S12571-025C. A full readout el…
View article: Recent Results from MICE on Multiple Coulomb Scattering and Energy Loss
Recent Results from MICE on Multiple Coulomb Scattering and Energy Loss Open
Multiple coulomb scattering and energy loss are well known phenomena experienced by charged particles as they traverse a material. However, from recent measurements by the MuScat collaboration, it is known that the available simulation cod…
View article: The Baby MIND spectrometer for the J-PARC T59(WAGASCI) experiment
The Baby MIND spectrometer for the J-PARC T59(WAGASCI) experiment Open
The Baby MIND spectrometer is designed to measure the momentum and charge of muons from neutrino interactions in water and hydrocarbon targets at the J-PARC T59 (WAGASCI) experiment. The WAGASCI experiment will measure the ratio of neutrin…
View article: Proposal to Measure Hadron Scattering with a Gaseous High Pressure TPC for Neutrino Oscillation Measurements
Proposal to Measure Hadron Scattering with a Gaseous High Pressure TPC for Neutrino Oscillation Measurements Open
We propose to perform new measurements of proton and pion scattering on argon using a prototype High Pressure gas Time Projection Chamber (HPTPC) detector, and by doing so to develop the physics case for, and the technological readiness of…
View article: Synchronization of the distributed readout frontend electronics of the Baby MIND detector
Synchronization of the distributed readout frontend electronics of the Baby MIND detector Open
Baby MIND is a new downstream muon range detector for the WGASCI experiment. This article discusses the distributed readout system and its timing requirements. The paper presents the design of the synchronization subsystem and the results …
View article: Lattice design and expected performance of the Muon Ionization Cooling Experiment demonstration of ionization cooling
Lattice design and expected performance of the Muon Ionization Cooling Experiment demonstration of ionization cooling Open
Muon beams of low emittance provide the basis for the intense, well-characterized neutrino beams necessary to elucidate the physics of flavor at a neutrino factory and to provide lepton-antilepton collisions at energies of up to several Te…
View article: Baby MIND Experiment Construction Status
Baby MIND Experiment Construction Status Open
Baby MIND is a magnetized iron neutrino detector, with novel design features, and is planned to serve as a downstream magnetized muon spectrometer for the WAGASCI experiment on the T2K neutrino beam line in Japan. One of the main goals of …
View article: Baby MIND: A magnetised spectrometer for the WAGASCI experiment
Baby MIND: A magnetised spectrometer for the WAGASCI experiment Open
The WAGASCI experiment being built at the J-PARC neutrino beam line will measure the difference in cross sections from neutrinos interacting with a water and scintillator targets, in order to constrain neutrino cross sections, essential fo…