• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Search for New Symmetry Violation in Leptons

Research Project

Project/Area Number 18H05226
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Review Section Broad Section B
Research InstitutionNagoya University

Principal Investigator

飯嶋 徹  名古屋大学, 素粒子宇宙起源研究所, 教授 (80270396)

Co-Investigator(Kenkyū-buntansha) 早坂 圭司  新潟大学, 自然科学系, 教授 (40377966)
角野 秀一  東京都立大学, 理学研究科, 教授 (70376698)
三部 勉  大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (80536938)
Project Period (FY) 2018-06-11 – 2023-03-31
Project Status Granted (Fiscal Year 2022)
Budget Amount *help
¥191,620,000 (Direct Cost: ¥147,400,000、Indirect Cost: ¥44,220,000)
Fiscal Year 2022: ¥28,470,000 (Direct Cost: ¥21,900,000、Indirect Cost: ¥6,570,000)
Fiscal Year 2021: ¥24,700,000 (Direct Cost: ¥19,000,000、Indirect Cost: ¥5,700,000)
Fiscal Year 2020: ¥48,620,000 (Direct Cost: ¥37,400,000、Indirect Cost: ¥11,220,000)
Fiscal Year 2019: ¥36,790,000 (Direct Cost: ¥28,300,000、Indirect Cost: ¥8,490,000)
Fiscal Year 2018: ¥53,040,000 (Direct Cost: ¥40,800,000、Indirect Cost: ¥12,240,000)
Keywords素粒子実験 / レプトン / 加速器 / 粒子測定技術 / 素粒子物理学 / 対称性の破れ / フレーバー物理 / 異常磁気能率 / 粒子識別装置 / ビッグデータ / 粒子測定器 / 電子-陽電子 / 電子・陽電子
Outline of Annual Research Achievements

SuperKEKB/Belle II実験においては、コロナ禍の影響を受けながらも、実験装置の運転とデータ収集を継続し、R2年度末までに約90fb-1、R2→R3年度の繰越分の研究完了までには約210fb-1のデータ蓄積を達成することができた。この間、加速器研究者と協力して加速器ルミノシティを高めるとともに、検出器バックグランドの低減化を図り、より高いルミノシティでのデータ取得達成を目指した。その一方で、本研究において検出器性能やデータ解析効率を極限まで高め、効率良いデータ収集と解析を以下のように進めた。
B崩壊研究においては、前年度に引き続き、B中間子タウオニック崩壊の解析プログラムの整備、シミュレーションによるバックグランドの評価、解析効率の評価、解析の最適化に関する研究を進めた。タウレプトンのデータ解析では、τ→lγ(l=e,μ)の解析を先行実験Belleのデータを使って進め、過去の結果よりも高い感度での探索が可能になることを明らかにした。TOPおよびARICHカウンターの運用を継続し、光検出器の調整と性能評価を行うとともに、将来的に向けた開発としてSiPMを使った光センサーの開発を進めた。コンピューティングにおいては、各サイトのダウンタイム等を自動的に検出し、それに対応したジョブ導入やにファイル転送の高度化を実現した。また各解析者の不具合を自動的に追跡し、より容易に問題点を探しあてるツールも開発した。
一方、J-PARC E34実験に関連する研究では、前年度に引き続いて、超低速ミューオン源の開発とミューオン線形加速器の開発を進めた。特に後者においては、初段RFQと2段目のIH加速器間でのビーム輸送経路のデザインと、ビームモニターとしての超高時間分解能低エネルギー荷電粒子測定器の性能改良を、目標性能を達成した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

Belle II実験の蓄積データ量(R2年度末までに約90fb-1、R2→R3年度の繰越分の研究完了までには約210fb-1)は、当初の目標値(R2年度末までに500fb-1)よりも低い値となったが、これはコロナ禍による影響や、加速器運転時間によるもので、本研究にとっては外的な要因である。その一方で、加速器の衝突性能は世界最高値を達成し、Belle II検出器のデータ収集効率を90%にまで改善することができ、今後、十分な運転時間が確保されれば、所定のB中間子崩壊とタウレプトン崩壊に関する物理成果を得ることが可能と考えている。一方、ミューオンg-2に寄与する量子補正効果の評価を与える電子-陽電子衝突団面積の測定については、これまでに蓄積したデータで十分な精度の結果が得られる見込みである。また、新しく導入した粒子識別装置(TOPおよびARICHカウンター)についても性能が検証され、物理解析においても効果が確認されたほか、将来的な導入を検討している新型光センサーの開発も進んでいる。
J-PARC E34実験に関連する研究では、前年度に引き続いて、超低速ミューオン源の開発とミューオン線形加速器の開発を進めた。特に後者においては、初段RFQと2段目のIH加速器間でのビーム輸送経路のデザインと、ビームモニターとしての超高時間分解能低エネルギー荷電粒子測定器の性能改良を、目標性能を達成した。

Strategy for Future Research Activity

SuperKEKB/Belle II実験においては、R4年度までに、500 fb-1以上のデータ蓄積を達成し、物理成果の獲得を進める。加速器ルミノシティを高めるとともに、検出器バックグランドの低減化を図り、より高いルミノシティでのデータ取得達成を目指す。加速器運転時間の不足を補うべく、検出器性能やデータ解析効率を極限まで高め、効率良いデータ収集と解析を以下のように進める。
B中間子崩壊におけるレプトン普遍性の破れの研究においては、2021年夏までに蓄積されたデータを使って、B→D*τν事象の崩壊分岐比測定の最初の結果抽出を進め、引き続き2022年夏までに蓄積される予定の約500fb-1のデータ解析を進める。タウLFV探索において重要なレプトン識別の理解をさらに進め、統計誤差評価用のモジュール開発も並行して行っていく。
多彩なタウLFV探索を進めて行く。特にLτ-Lμモデルに感度のあるτ→lepton+a 探索に注力する。また従来高統計を求められたタウLFVモードに対して比較的低統計でも対応可能な探索の高感度化のスタディを推進する。電子-陽電子衝突断面積の精密測定については、e+e- -> pi+pi-pi0反応に関する結果獲得と論文発表を目指す。粒子識別装置については、寿命改良型光検出器の導入を進めるとともに、Belle II 実験の高度化において予想される高い放射線環境での動作に対応した研究開発を進める。
一方、J-PARCミューオンg-2/EDM実験の技術開発では、これまで準備を行ってきた室温シリカエアロゲルで生成した熱ミューオニウムのイオン化による超低速ミューオン源の実証、得られた超低速ミューオンの加速テストを行う。

Assessment Rating
Interim Assessment Comments (Rating)

A: In light of the aim of introducing the research area into the research categories, the expected progress has been made in research.

Report

(7 results)
  • 2020 Abstract (Interim Assessment) ( PDF )   Annual Research Report   Interim Assessment (Comments) ( PDF )
  • 2019 Annual Research Report
  • 2018 Abstract ( PDF )   Comments on the Screening Results ( PDF )   Annual Research Report

Research Products

(111 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (15 results) Journal Article (21 results) (of which Int'l Joint Research: 18 results,  Peer Reviewed: 20 results,  Open Access: 11 results) Presentation (67 results) (of which Int'l Joint Research: 31 results,  Invited: 20 results) Remarks (5 results) Funded Workshop (3 results)

  • [Int'l Joint Research] University of H/Brookhaven National Laboratory/University of Cincinnatti(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Josef Stefan Institute/University of Ljubljana/University of Maribor(スロベニア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] INFN, University of Padova/INFN, University of Torino(イタリア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] University of British Columbia/University of Victoria(カナダ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Budker Institute for Nuclear Physics(ロシア連邦)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] University of Hawaii/Brookhaven National Laboratory/University of Cincinnatti(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Josef Stefan Institute/University of Ljubljana/University of Maribor(スロベニア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] INFN, University of Padova/INFN, University of Torino(イタリア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] TRIUMF/University of British Columbia/University of Victoria(カナダ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Budker Institute for Nuclear Physics(ロシア連邦)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Hawaii/Pacific Northwest National Laboratory/University of Cincinnatti(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Josef Stefan Institute/University of Ljubljana/University of Maribor(スロベニア)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] INFN, University of Padova/INFN, University of Torino(イタリア)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] TRIUMF/University of British Columbia/University of Victoria(カナダ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Budker Institute for Nuclear Physics(ロシア連邦)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Performance evaluation of the aerogel RICH counter for the Belle II spectrometer using early beam collision data2020

    • Author(s)
      M. Yonenaga et al.
    • Journal Title

      PTEP

      Volume: 9

    • DOI

      10.1093/ptep/ptaa090

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Search for an Invisibly Decaying Z′ Boson at Belle II in e+e- -> μ+μ-(e+/-μ-/+) Plus Missing Energy Final States2020

    • Author(s)
      A. Ishikawa (Belle II Collaboration)
    • Journal Title

      Physical Review Letters

      Volume: 124 Pages: 14-14

    • DOI

      10.1103/physrevlett.124.141801

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Search for Axionlike Particles Produced in e+e- Collisions at Belle II2020

    • Author(s)
      F. Abudinen et al. (Belle II Collaboration)
    • Journal Title

      Physical Review Letters

      Volume: 125 Pages: 161806-161806

    • DOI

      10.1103/physrevlett.125.161806

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment2020

    • Author(s)
      F. Abudinen, ..., K. Hayasaka,..., T. Iijima, ..., H. Kakuno, 他393名 (Belle II Collaboration)
    • Journal Title

      Chinese Physics C

      Volume: 44 Pages: 021001-021001

    • DOI

      10.1088/1674-1137/44/2/021001

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Development of a bunch-width monitor for low-intensity muon beam below a few MeV2020

    • Author(s)
      Sue Yuki, Yotsuzuka Mai, Iijima Toru, Mibe Tsutomu 他18名
    • Journal Title

      Physical Review Accelerators and Beams

      Volume: 23 Pages: 022804-022804

    • DOI

      10.1103/physrevaccelbeams.23.022804

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Operational status of the Belle II Time-Of-Propagation counter readout and data acquisition system2020

    • Author(s)
      Maeda Y.、Andrew M.、Atmacan H.、Bessner M.、Gaz A.、Hartbrich O.、Hirata H.、Iijima T.、Inami K.、Macchiarulo L.、Matsuoka K.、Muroyama G.、Neverov D.、Nisar N.K.、Nishimura K.、Okuto R.、Savinov V.、Senga S.、Suzuki K.、Tsuzuki N.、Varner G.S.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 952 Pages: 162049-162049

    • DOI

      10.1016/j.nima.2019.04.003

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Initial performance of the Aerogel RICH detector of the Belle II experiment2020

    • Author(s)
      Kindo H., ..., Kakuno H., 他26名
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 952 Pages: 162252-162252

    • DOI

      10.1016/j.nima.2019.05.093

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Performance and commissioning of HAPDs in the Aerogel RICH counter2020

    • Author(s)
      Yonenaga Masanobu, ..., Iijima Toru, ..., Kakuno Hidekazu 他29名
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 952 Pages: 162264-162264

    • DOI

      10.1016/j.nima.2019.06.005

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Development of alignment algorithm for Belle II Aerogel RICH counter2020

    • Author(s)
      Tamechika S., ..., Kakuno H. 他26名
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 952 Pages: 162337-162337

    • DOI

      10.1016/j.nima.2019.162337

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Belle II Physics Book2019

    • Author(s)
      Kou E、Urquijo P、..., K. Hayasaka,..., T. Iijima, ..., H. Kakuno, 他533名
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2019 Pages: 1645-1645

    • DOI

      10.1093/ptep/ptz106

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Compact buncher cavity for muons accelerated by a radio-frequency quadrupole2019

    • Author(s)
      Otani M.、Sue Y.、Futatsukawa K.、Iijima T.、Iinuma H.、Kawamura N.、Kitamura R.、Kondo Y.、Morishita T.、Nakazawa Y.、Yasuda H.、Yotsuzuka M.、Saito N.、Yamazaki T.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 946 Pages: 162693-162693

    • DOI

      10.1016/j.nima.2019.162693

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Negative Muonium Ion Production With a C12A7 Electride Film2019

    • Author(s)
      Otani M.、Fukao Y.、Futatsukawa K.、Kawamura N.、Matoba S.、Mibe T.、Miyake Y.、Shimomura K.、Yamazaki T.、Hasegawa K.、Kitamura R.、Kondo Y.、Morishita T.、Iijima T.、Inami K.、Sue Y.、Yotsuzuka M.、Iinuma H.、Nakazawa Y.、Ishida K.、Saito N.、Yasuda H.
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1350 Pages: 012067-012067

    • DOI

      10.1088/1742-6596/1350/1/012067

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Beam commissioning of muon beamline using negative hydrogen ions generated by ultraviolet light2019

    • Author(s)
      Nakazawa Y.、Bae S.、Choi H.、Choi S.、Iijima T.、Iinuma H.、Kawamura N.、Kitamura R.、Kim B.、Ko H.S.、Kondo Y.、Mibe T.、Otani M.、Razuvaev G.P.、Saito N.、Sue Y.、Won E.、Yamazaki T.、Yasuda H.
    • Journal Title

      Nucl. Instrum. Meth. A

      Volume: 937 Pages: 164-167

    • DOI

      10.1016/j.nima.2019.05.043

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A new approach for measuring the muon anomalous magnetic moment and electric dipole moment2019

    • Author(s)
      Abe M.、Mibe T.、Saito N.、Sato Y.、Yamanaka T.、Yoshioka T.、et al.
    • Journal Title

      Prog. Theo. Exper. Phys.

      Volume: 2019 Pages: 1-22

    • DOI

      10.1093/ptep/ptz030

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A New Approach for Measuring the Muon Anomalous Magnetic Moment and Electric Dipole Moment2019

    • Author(s)
      M. Abe, ... K. Hayasaka, ..., T. Iijima ..., K. Inami, ..., T. Mibe, ... K. Suzuki et al.
    • Journal Title

      Prog. Theor. Exp. Phys.

      Volume: 印刷中

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] SuperKEKB/Belle II実験の物理2018

    • Author(s)
      飯嶋 徹
    • Journal Title

      日本加速器学会誌

      Volume: 15 Pages: 221-228

    • NAID

      130008101468

    • Related Report
      2018 Annual Research Report
    • Open Access
  • [Journal Article] Improvement of the MCP-PMT Performance Under a High Count Rate2018

    • Author(s)
      Matsuoka Kodai、Hirose Shigeki、Iijima Toru、Inami Kenji、Kato Yuji、Kobayashi Kazuho、Maeda Yosuke、Muroyama Genta、Omori Raita、Suzuki Kazuhito
    • Journal Title

      Proceedings of International Conference on Technology and Instrumentation in Particle Physics 2017

      Volume: 1 Pages: 271-274

    • DOI

      10.1007/978-981-13-1316-5_51

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] MCP-PMT production for Belle II TOP detector and further R&D2018

    • Author(s)
      Inami K.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 印刷中

    • DOI

      10.1016/j.nima.2018.09.038

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of Slow Control System for the Belle II ARICH Counter2018

    • Author(s)
      Yonenaga M.、Adachi I.、Dolenec R.、Hataya K.、Kakuno H.、Kawai H.、Kindo H.、Konno T.、Korpar S.、Krizan P.、Kumita T.、Machida M.、Mrvar M.、Nishida S.、Noguchi K.、Ogawa K.、Ogawa S.、Pestotnik R.、Santelj L.、Sumiyoshi T.、Tabata M.、Yoshizawa M.、Yusa Y.
    • Journal Title

      Proceedings of International Conference on Technology and Instrumentation in Particle Physics 2017

      Volume: 1 Pages: 46-49

    • DOI

      10.1007/978-981-13-1313-4_10

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Aerogel Ring Image Cherenkov Counter for Particle Identification in the Belle II Experiment2018

    • Author(s)
      Konno Tomoyuki, Adachi Ichiro, Dolenec Rok, Kakuno Hidekazu et al.
    • Journal Title

      Proceedings of International Conference on Technology and Instrumentation in Particle Physics 2017

      Volume: 1 Pages: 270-274

    • DOI

      10.1007/978-981-13-1313-4_51

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Development of a microchannel plate based beam profile monitor for a re-accelerated muon beam2018

    • Author(s)
      Kim Bongho、Bae Sunghan、Choi Hyunsuk、Choi Seonho、Kawamura Naritoshi、Kitamura Ryo、Ko Ho San、Kondo Yasuhiro、Mibe Tsutomu、Otani Masashi、Razuvaev Georgiy P.、Won Eunil
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 899 Pages: 22-27

    • DOI

      10.1016/j.nima.2018.05.014

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Tau EDM/MDM results and prospects2021

    • Author(s)
      Kiyoshi Hayasaka
    • Organizer
      XV International Conference on Heavy Quarks and Leptons (HQL 2021)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Tau physics prospects at Belle II2021

    • Author(s)
      Kenji Inami
    • Organizer
      the 40th International Conference on High Energy Physics
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The operation and performance of the TOP detector at the Belle II experiment2021

    • Author(s)
      Kazuki Kojima
    • Organizer
      The European Physical Society Conference on High Energy Physics 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高輝度環境下での SiPM の 1 光子時間分解能測定2021

    • Author(s)
      前田朱音
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II 実験TOPカウンター用MCP-PMT交換に向けた改良型PMTモジュールの開発2021

    • Author(s)
      中野友也
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II実験TOPカウンターにおけるMCP-PMTの量子効率測定と最新の運転状況2021

    • Author(s)
      大久保亮吾
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II実験 ARICH検出器アップグレードに向けた光検出器MPPCの放射線耐性の評価2021

    • Author(s)
      本橋 完太
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II実験におけるARICH検出器のアライメントI2021

    • Author(s)
      朴 兌秀
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II実験におけるARICH検出器のアライメントII2021

    • Author(s)
      岩城 彩希
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II status and highlights2020

    • Author(s)
      Toru Iijima
    • Organizer
      19th International Conference on B-Physics at Frontier Machines, BEAUTY 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Belle II 実験におけるLepton Flavor Violation過程τ→lV0の研究2020

    • Author(s)
      都築識次
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II実験高輝度化に向けたSiPMを用いたTOPカウンターの実現可能性の検討2020

    • Author(s)
      前原真心
    • Organizer
      Flavor Physics Workshop 2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] ニューラルネットワークを用いたBelle II実験TOPカウンター粒子識別アルゴリズムの開発2020

    • Author(s)
      原舜基
    • Organizer
      Flavor Physics Workshop 2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II実験高輝度化に向けたSiPMを導入したTOPカウンターの性能の見積もり2020

    • Author(s)
      前原真心
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Belle II 実験TOP カウンターの衝突データを用いた光子検出能力安定性の評価と最新の運転状況2020

    • Author(s)
      児島一輝
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ニューラルネットワークを用いたBelleII実験TOPカウンター粒子識別アルゴリズムの開発2020

    • Author(s)
      原舜基
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] BelleII実験TOPカウンター長期運転に向けた寿命改善型ALD-MCP-PMTの寿命の評価と性能の全数測定2020

    • Author(s)
      中野友也
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 磁場中または低温環境下におけるSiPMの1光子時間分解能測定2020

    • Author(s)
      前田朱音
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Muon g-2/EDM experiment at J-PARC2020

    • Author(s)
      T. Mibe
    • Organizer
      Kick-off workshop for the search of a muon EDM using the frozen spin technique at PSI
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Preparation for phase-0 experiment of muonium ionization with 1S-2S excitation2020

    • Author(s)
      C. Zhang
    • Organizer
      The 12th International Workshop on Fundamental Physics Using Atoms
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Belle II実験世界規模分散計算システムにおける物理解析ジョブ実行効率の改善2020

    • Author(s)
      平田光
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Belle II実験ARICHの光検出器アップグレードに向けた研究12020

    • Author(s)
      古井孝侑
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Belle II実験ARICHの光検出器アップグレードに向けた研究22020

    • Author(s)
      鶴藤昌人
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Ionization of muonium by 1S-2S excitation at J-PARC2020

    • Author(s)
      C. Zhang
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] J-PARC E34実験:ミューオン線形加速器におけるRFQとIH-DTL間ビーム輸送ラインのデザイン2020

    • Author(s)
      四塚麻衣
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Muon g-2/EDM experiment at J-PARC2020

    • Author(s)
      三部 勉
    • Organizer
      第10回「Muon科学と加速器研究」研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Rare decays studies using early Belle II data2019

    • Author(s)
      M.Yonenaga
    • Organizer
      Beauty2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] MCP-PMT for the Belle II TOP counter2019

    • Author(s)
      K. Matsuoka
    • Organizer
      DIRC2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] B→D(*)τντ decays at Belle and prospects at Belle II2019

    • Author(s)
      K. Matsuoka
    • Organizer
      Anomalies 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Review of B→D(*)τντ decays at Belle2019

    • Author(s)
      松岡 広大
    • Organizer
      B ファクトリー物理勉強会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] J-PARC muon g-2/EDM experiment2019

    • Author(s)
      K. Suzuki
    • Organizer
      Workshop “New Developments of Muon Precision Physics”
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The status and prospect of the muon g-2/EDM experiment at J-PARC2019

    • Author(s)
      K. Suzuki
    • Organizer
      Anomalies 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of the Muon Beam Transport Line in the J-PARC2019

    • Author(s)
      M. Yotsuzuka
    • Organizer
      2nd International School on Beam Dynamics and Accelerator Technology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Belle II 実験 TOP counter の位置時間較正2019

    • Author(s)
      原舜基
    • Organizer
      Flavor Physics Workshop 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Belle II 実験 TOP カウンターにおける衝突データを用いた光検出器MCP-PMTの性能時間変動の評価2019

    • Author(s)
      児島一輝
    • Organizer
      Flavor Physics Workshop 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Belle II 高度化に向けたTOP カウンター用光検出器の研究2019

    • Author(s)
      前原真心
    • Organizer
      Flavor Physics Workshop 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Belle II実験TOPカウンターにおける光検出器MCP-PMTのオフラインモニターの製作とそれを用いた性能評価2019

    • Author(s)
      児島一輝
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Belle II実験ARICH検出器アップグレードに向けた光検出器MPPCの研究2019

    • Author(s)
      久世健太郎
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Belle II実験ARICH検出器アップグレードのための光検出器MPPC用ASICの開発2019

    • Author(s)
      鶴藤昌人
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Belle II実験ARICH検出器のPhase3データを用いた粒子識別性能の評価2019

    • Author(s)
      米永匡伸
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Ionization of thermal muonium via 1S-2S transition by pulsed laser2019

    • Author(s)
      C. Zhang
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] J-PARC E34 muon g-2/EDM実験:ミューオン線型加速器のための縦方向ビームプロファイルモニター性能評価における時間分解能の改善2019

    • Author(s)
      四塚麻衣
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ミューオン高周波加速のための高時間分解能バンチ長測定2019

    • Author(s)
      須江祐貴
    • Organizer
      第16回日本加速器学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] J-PARC E34 muon g-2/EDM実験:低エミッタンスミューオンビーム実現に向けた高時間分解能縦方向ビームプロファイルモニターの開発2019

    • Author(s)
      四塚麻衣
    • Organizer
      第16回日本加速器学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Looking at Particle - AntiParticle asymmetry with Heavy Flavors2019

    • Author(s)
      飯嶋徹
    • Organizer
      4th KMI International Symposium (KMI 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Tau physics at Belle II2019

    • Author(s)
      早坂圭司
    • Organizer
      4th KMI International Symposium (KMI 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Belle実験分散コンピューティングシステムの運用状況2019

    • Author(s)
      加藤悠司
    • Organizer
      日本物理学会年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Belle II2019

    • Author(s)
      加藤悠司
    • Organizer
      2019 Joint HSF/OSG/WLCG Workshop HOW2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Muon g-2/EDM measurement at J-PARC2019

    • Author(s)
      三部勉
    • Organizer
      International Workshop on e+e- collisions from Phi to Psi
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] R(D(*)): Status at Belle & Outlook for Belle II2018

    • Author(s)
      飯嶋徹
    • Organizer
      SCGP Workshop on Exotic Hadrons and Flavor Physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Belle II: interplay with LHC2018

    • Author(s)
      飯嶋徹
    • Organizer
      XIII Meeting on B Physics: Synergy between LHC and SuperKEKB in the Quest for New Physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Particle Physics at the SuperKEKB/Belle II Experiment2018

    • Author(s)
      飯嶋徹
    • Organizer
      International Symposium in Honor of Professor Nambu for the 10th Anniversary of his Nobel Prize in Physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] New results on R(D) and R(D*) from Belle2018

    • Author(s)
      松岡広大
    • Organizer
      39th International Conference on High Energy Physics (ICHEP2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Belle status and Belle II prospect for B->D(*) tau nu and related topics2018

    • Author(s)
      松岡広大
    • Organizer
      2018 WPI-next mini-workshop "Hints for New Physics in Heavy Flavors"
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Belle II実験におけるB→D(*)lνl崩壊のレプトン普遍性の検証2018

    • Author(s)
      松岡広大
    • Organizer
      Flavor Physics Workshop 2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] Belle II実験に於けるe+e-→π+π-反応断面積精密測定手法の研究2018

    • Author(s)
      前田陽祐
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Measurement of cross section of light hadron production in e+e- collisions in the Belle II experiment2018

    • Author(s)
      前田陽祐
    • Organizer
      2018 WPI-next mini-workshop "Hints for New Physics in Heavy Flavors"
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of the Lorentz structure of tau decays and the rare tau decays from Belle2018

    • Author(s)
      早坂圭司
    • Organizer
      XXXIX International Conference on High Energy Physics (ICHEP 2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] MCP-PMT production for Belle II TOP detector and further R&D2018

    • Author(s)
      居波賢二
    • Organizer
      PM2018 14th Pisa meeting on Advanced Detectors
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Monitoring system for Belle II distributed computing2018

    • Author(s)
      加藤悠司
    • Organizer
      23rd International Conference on Computing in High-Energy and Nuclear Physics (CHEP2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of muon's g-2 and EDM with a reaccelerated thermal muon beam2018

    • Author(s)
      三部勉
    • Organizer
      Workshop on muonium and related physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Muon g-2/EDM measurement at J-PARC2018

    • Author(s)
      三部勉
    • Organizer
      SchwingerFest2018: g-2
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Muon g-2/EDM measurement at J-PARC2018

    • Author(s)
      三部勉
    • Organizer
      The 15th International Workshop on Tau Lepton Physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Muon (g-2)/EDM at J-PARC2018

    • Author(s)
      三部勉
    • Organizer
      School on muon dipole moments and hadronic effects
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Muon g-2/EDM measurement at J-PARC2018

    • Author(s)
      三部勉
    • Organizer
      g-2 theory initiative workshop
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] J-PARCミューオンg-2/EDM実験のためのレーザー加工したシリカエアロゲル標的からのミューオニウム放出の研究2018

    • Author(s)
      鈴木一仁
    • Organizer
      日本物理学会秋季分科会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Development of the muonium production target for the J-PARC g-2/EDM experiment2018

    • Author(s)
      鈴木一仁
    • Organizer
      Workshop on muonium and related physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 名古屋大学 高エネルギー素粒子物理学研究室

    • URL

      http://www.hepl.phys.nagoya-u.ac.jp

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report 2018 Annual Research Report
  • [Remarks] 重フレーバー素粒子物理学国際研究ユニット

    • URL

      http://wru.hepl.phys.nagoya-u.ac.jp

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report 2018 Annual Research Report
  • [Remarks] 首都大学東京 高エネルギー物理実験研究室

    • URL

      https://www-hep.phys.se.tmu.ac.jp

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report 2018 Annual Research Report
  • [Remarks] 新潟大学 高エネルギー物理学研究室

    • URL

      http://www.hep.sc.niigata-u.ac.jp

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report 2018 Annual Research Report
  • [Remarks] Muon g-2/EDM experiment at J-PARC

    • URL

      http://g-2.kek.jp/portal/index.html

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report 2018 Annual Research Report
  • [Funded Workshop] 2018 WPI-next Mini-workshop "Hints for New Physics in Heavy Flavors"2018

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] Physics of monism and related topics2018

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] Muon g-2/EDM Software & Analysis Workshop2018

    • Related Report
      2018 Annual Research Report

URL: 

Published: 2018-06-12   Modified: 2022-12-28  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi