scispace - formally typeset
Search or ask a question
Author

T. Matsumoto

Bio: T. Matsumoto is an academic researcher from Nagoya University. The author has contributed to research in topics: Photomultiplier & Cherenkov detector. The author has an hindex of 8, co-authored 10 publications receiving 210 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, a new concept of a Cherenkov detector for particle identification by means of measuring the Time-of-Propagation (TOP) of cherenkov photons is described.
Abstract: We describe here a new concept of a Cherenkov detector for particle identification by means of measuring the Time-of-Propagation (TOP) of Cherenkov photons.

67 citations

Journal ArticleDOI
TL;DR: The Central Drift Chamber of the BELLE detector at the KEK B-factory is a cylindrical wire chamber device that uses a helium-based gas and aluminum field wires and is situated in a 1.5 T magnetic field as discussed by the authors.
Abstract: The Central Drift Chamber of the BELLE detector at the KEK B-factory is a cylindrical wire chamber device that uses a helium-based gas and aluminum field wires and is situated in a 1.5 T magnetic field. The transverse momentum resolution for charged tracks with 1.0 GeV/c transverse momentum is 0.35%. This paper describes the chamber's configuration and performance.

33 citations

Journal ArticleDOI
TL;DR: The Time-Of-Propagation (TOP) counter as discussed by the authors measures both the time and position information of radiated photons with high resolutions to distinguish the Cherenkov angles between different particle species.
Abstract: The Time-Of-Propagation (TOP) counter measures both the time and position information of radiated photons with high resolutions to distinguish the Cherenkov angles between different particle species. Current R&D status is reported. We also propose a further simplified version of the TOP-counter.

33 citations

Journal ArticleDOI
TL;DR: By shortening the distance between the photocathode and the first dynode to 1 mm and using a finer mesh size of 2500 lines/in. with, a 24 anode linear-array of fine-mesh photomultiplier tube has produced a clear single-photon peak in its pulse-height distribution under a strong magnetic field of, and provided of transit time spread (TTS) and 85% of photoelectron detection efficiency as discussed by the authors.
Abstract: By shortening the distance between the photocathode and the first dynode to 1 mm and using a finer mesh size of 2500 lines/in. with , a 24 anode linear-array of fine-mesh photomultiplier tube has produced a clear single-photon peak in its pulse-height distribution under a strong magnetic field of , and provided of transit time spread (TTS) and 85% of photoelectron detection efficiency.

18 citations

Journal ArticleDOI
TL;DR: In this article, the authors studied the timing property of a Hybrid Avalanche PhotoDiode, Hamamatsu R7110U-07, and attained a time resolution of σ t ∼150 ps for single photons and ⩽100 ps for a few photons under certain conditions of photocathode voltage and diode reverse bias voltage.
Abstract: We have studied the timing property of a Hybrid Avalanche PhotoDiode, Hamamatsu R7110U-07, and attained a time resolution of σ t ∼150 ps for single photons and ⩽100 ps for a few photons under certain conditions of photocathode voltage and diode reverse bias voltage Relation between the achievable timing resolution and a multiplication gain is discussed, especially in realizing σ t ⩽100 ps for single photons

17 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: The BELLE detector for experiments at KEKB, a high luminosity, energy asymmetric B-factory, is now being constructed at KEK, and an overview of the detector systems and their status is presented.
Abstract: The BELLE detector for experiments at KEKB, a high luminosity, energy asymmetric B-factory, is now being constructed at KEK. An overview of the detector systems and their status is presented.

1,057 citations

Journal ArticleDOI
Massimo Antonelli, D. M. Asner, D. Bauer, Thomas Becher, M. Beneke, Adrian John Bevan, Monika Blanke, C. Bloise, Marcella Bona, A.E. Bondar, C. Bozzi, Joachim Brod, Andrzej J. Buras, N. Cabibbo, Angelo Carbone, G. Cavoto, Vincenzo Cirigliano, Marco Ciuchini, J. P. Coleman, Daniel P Cronin-Hennessy, Jeremy Dalseno, Christine Davies, F. DiLodovico, J. C. Dingfelder, Zdenek Dolezal, S. Donati, W. Dungel, Ulrik Egede, G. Eigen, R. Faccini, Th. Feldmann, F. Ferroni, Jonathan M. Flynn, E. Franco, Masahiro Fujikawa, I. K. Furic, Paolo Gambino, Einan Gardi, Timothy Gershon, Stefano Giagu, Eugene Golowich, T. Goto, Christoph Greub, Christophe Grojean, Diego Guadagnoli, Ulrich Haisch, R. F. Harr, André H. Hoang, Tobias Hurth, Gino Isidori, D. E. Jaffe, Andreas Jüttner, Sebastian Jäger, Alexander Khodjamirian, Patrick Koppenburg, R. Kowalewski, P. Krokovny, Andreas S. Kronfeld, Jack Laiho, G. Lanfranchi, T. E. Latham, J. Libby, Antonio Limosani, D. Lopes Pegna, Cai-Dian Lü, Vittorio Lubicz, Enrico Lunghi, V. Luth, Kim Maltman, William J. Marciano, E. C. Martin, Guido Martinelli, F. Martinez-Vidal, A. Masiero, Vicent Mateu, Federico Mescia, G. B. Mohanty, M. Moulson, Matthias Neubert, Helmut Neufeld, S. Nishida, N. Offen, M. Palutan, P. Paradisi, Z. Parsa, E. Passemar, M. Patel, Ben D. Pecjak, Alexey A. Petrov, Antonio Pich, Maurizio Pierini, Brad Plaster, A. Powell, S. Prell, J. Rademaker, M. Rescigno, S. Ricciardi, Patrick Robbe, Eduardo Rodrigues, Marcello Rotondo, R. Sacco, C. J. Schilling, O. Schneider, Enno E. Scholz, B. A. Schumm, C. Schwanda, A. J. Schwartz, Barbara Sciascia, J. Serrano, Junko Shigemitsu, I. P.J. Shipsey, A.L. Sibidanov, Luca Silvestrini, F. Simonetto, Silvano Simula, Caleb Smith, Amarjit Soni, Lars Sonnenschein, Viola Sordini, M. Sozzi, T. Spadaro, P. Spradlin, A. Stocchi, Nazario Tantalo, Cecilia Tarantino, A. V. Telnov, D. Tonelli, I. S. Towner, K. Trabelsi, Phillip Urquijo, R. S. Van de Water, R. Van Kooten, Javier Virto, G. Volpi, Rainer Wanke, S. Westhoff, G. Wilkinson, Matthew Wingate, Yuehong Xie, Jure Zupan 
TL;DR: A review of the status of quark flavor physics can be found in this article, which summarizes the results of the current generation of experiments that is about to be completed and confronts these results with the theoretical understanding of the field.
Abstract: One of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor and measurements and theoretical interpretations of their results have advanced tremendously: apart from masses and quantum numbers of flavor particles, there now exist detailed measurements of the characteristics of their interactions allowing stringent tests of Standard Model predictions. Among the most interesting phenomena of flavor physics is the violation of the CP symmetry that has been subtle and difficult to explore. Till early 1990s observations of CP violation were confined to neutral $K$ mesons, but since then a large number of CP-violating processes have been studied in detail in neutral $B$ mesons. In parallel, measurements of the couplings of the heavy quarks and the dynamics for their decays in large samples of $K, D$, and $B$ mesons have been greatly improved in accuracy and the results are being used as probes in the search for deviations from the Standard Model. In the near future, there will be a transition from the current to a new generation of experiments, thus a review of the status of quark flavor physics is timely. This report summarizes the results of the current generation of experiments that is about to be completed and it confronts these results with the theoretical understanding of the field.

208 citations

Journal ArticleDOI
Massimo Antonelli, D. M. Asner1, D. Bauer2, Thomas Becher3, M. Beneke4, Adrian John Bevan5, Monika Blanke6, C. Bloise, Marcella Bona7, A. Bondar8, C. Bozzi, Joachim Brod9, Andrzej J. Buras10, N. Cabibbo11, Angelo Carbone, G. Cavoto, Vincenzo Cirigliano12, Marco Ciuchini, J. P. Coleman13, Daniel P Cronin-Hennessy14, Jeremy Dalseno, Christine Davies15, F. Di Lodovico5, J. C. Dingfelder, Zdenek Dolezal16, S. Donati17, W. Dungel18, G. Eigen19, Ulrik Egede2, R. Faccini11, T. Feldmann10, F. Ferroni11, Jonathan M. Flynn20, E. Franco, Masahiro Fujikawa21, Ivan-Kresimir Furic22, Paolo Gambino23, Einan Gardi24, Timothy Gershon25, Stefano Giagu11, Eugene Golowich26, T. Goto, C. Greub27, C. Grojean7, Diego Guadagnoli10, U. A. Haisch28, R. F. Harr29, André H. Hoang6, Tobias Hurth13, Gino Isidori, D. E. Jaffe30, Andreas Jüttner28, Sebastian Jäger10, Alexander Khodjamirian31, Patrick Koppenburg2, R. Kowalewski32, P. Krokovny, Andreas S. Kronfeld3, Jack Laiho33, G. Lanfranchi, T. E. Latham25, J. Libby34, Antonio Limosani35, D. Lopes Pegna36, Cai-Dian Lü, Vittorio Lubicz37, E. Lunghi3, V. Luth13, K. Maltman38, W. J. Marciano30, E. C. Martin39, Guido Martinelli11, F. Martinez-Vidal40, A. Masiero41, Vicent Mateu6, Federico Mescia42, G. B. Mohanty43, M. Moulson, Matthias Neubert28, Helmut Neufeld44, S. Nishida, N. Offen45, M. Palutan, P. Paradisi10, Z. Parsa30, E. Passemar27, Maulik R. Patel7, Ben D. Pecjak28, Alexey A. Petrov29, Antonio Pich40, Maurizio Pierini7, Brad Plaster46, A. Powell47, S. Prell48, J. Rademaker49, M. Rescigno, S. Ricciardi50, Patrick Robbe45, Eduardo Rodrigues15, Marcello Rotondo, R. Sacco5, C. J. Schilling51, O. Schneider52, E. E. Scholz3, Bruce Schumm53, C. Schwanda18, A. J. Schwartz54, Barbara Sciascia, J. Serrano45, J. Shigemitsu27, I. P.J. Shipsey55, A.L. Sibidanov8, Luca Silvestrini, F. Simonetto41, Silvano Simula, Caleb Smith9, Amarjit Soni30, Lars Sonnenschein, Viola Sordini56, M. Sozzi17, T. Spadaro, P. Spradlin47, A. Stocchi45, Nazario Tantalo, Cecilia Tarantino37, A. V. Telnov36, D. Tonelli3, I. S. Towner57, K. Trabelsi, Phillip Urquijo35, R. S. Van De Water30, R. Van Kooten58, Javier Virto11, Guido Volpi17, Rainer Wanke28, S. Westhoff9, G. Wilkinson47, Matthew Wingate59, Yuehong Xie24, Jure Zupan60 
Carleton University1, Imperial College London2, Fermilab3, RWTH Aachen University4, Queen Mary University of London5, Max Planck Society6, CERN7, Budker Institute of Nuclear Physics8, Karlsruhe Institute of Technology9, Technische Universität München10, Sapienza University of Rome11, Los Alamos National Laboratory12, Stanford University13, University of Minnesota14, University of Glasgow15, Charles University in Prague16, University of Pisa17, Austrian Academy of Sciences18, University of Bergen19, University of Southampton20, Nara Women's University21, University of Florida22, University of Turin23, University of Edinburgh24, University of Warwick25, University of Massachusetts Amherst26, University of Bern27, University of Mainz28, Wayne State University29, Brookhaven National Laboratory30, Folkwang University of the Arts31, University of Victoria32, Washington University in St. Louis33, Indian Institute of Technology Madras34, University of Melbourne35, Princeton University36, Roma Tre University37, York University38, University of California, Irvine39, University of Valencia40, University of Padua41, University of Barcelona42, Tata Institute of Fundamental Research43, University of Vienna44, University of Paris-Sud45, University of Kentucky46, University of Oxford47, Iowa State University48, University of Bristol49, Rutherford Appleton Laboratory50, University of Texas at Austin51, École Polytechnique Fédérale de Lausanne52, University of California, Santa Cruz53, University of Cincinnati54, Purdue University55, ETH Zurich56, Queen's University57, Indiana University58, University of Cambridge59, University of Ljubljana60
TL;DR: In this time frame, measurements and the theoretical interpretation of their results have advanced tremendously as mentioned in this paper and a much broader understanding of flavor particles has been achieved, apart from their masses and quantum numbers, there now exist detailed measurements of the characteristics of their interactions allowing stringent tests of Standard Model predictions.

165 citations

Journal ArticleDOI
TL;DR: In this article, a cut on the normalized muon likelihood L μ was applied to identify the track as a muon and the average muon detection efficiency was 89% and the pion fake rate per track was 1.4% over the KLM acceptance.
Abstract: This paper describes the muon identification method and its performance in the Belle experiment at KEKB. Muon and hadron likelihood are calculated for each track using its range and transverse scattering in the KL-and-muon detector (KLM). We apply a cut on the normalized muon likelihood L μ to identify the track as a muon. Above the detection threshold of 0.6 GeV /c , the measured muon detection efficiency and pion fake rate are approximately constant for momenta greater than 1.0 and 1.5 GeV /c , respectively. Between 1.0 and 3.0 GeV /c , the averaged muon detection efficiency is 89% and the pion fake rate per track is 1.4% over the KLM acceptance, using the standard selection criterion L μ >0.9 .

115 citations

Journal ArticleDOI
TL;DR: The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay of the muon by using one of the most intense continuous $mu+$ beams in the world as mentioned in this paper.
Abstract: The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay \meg\ by using one of the most intense continuous $\mu^+$ beams in the world. This paper presents the MEG components: the positron spectrometer, including a thin target, a superconducting magnet, a set of drift chambers for measuring the muon decay vertex and the positron momentum, a timing counter for measuring the positron time, and a liquid xenon detector for measuring the photon energy, position and time. The trigger system, the read-out electronics and the data acquisition system are also presented in detail. The paper is completed with a description of the equipment and techniques developed for the calibration in time and energy and the simulation of the whole apparatus.

111 citations