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2023 Fiscal Year Annual Research Report

Study of new physics with electron-recoil events in the XENONnt and further breakthrough with a hermetic liquid xenon TPC

Research Project

Project/Area Number 21H04466
Research InstitutionNagoya University

Principal Investigator

伊藤 好孝  名古屋大学, 宇宙地球環境研究所, 教授 (50272521)

Co-Investigator(Kenkyū-buntansha) 山下 雅樹  東京大学, カブリ数物連携宇宙研究機構, 特任准教授 (10504574)
風間 慎吾  名古屋大学, 素粒子宇宙起源研究所, 准教授 (40736592)
森山 茂栄  東京大学, 宇宙線研究所, 教授 (50313044)
小林 雅俊  名古屋大学, 素粒子宇宙起源研究所, 特任助教 (50824059)
Project Period (FY) 2021-04-05 – 2025-03-31
Keywords暗黒物質 / 地下宇宙線 / 超対称性粒子 / 液体キセノン / ニュートリノ / 非加速器素粒子物理 / 国際協力 / アクシオン
Outline of Annual Research Achievements

XENONnT 最初のデータSR0(1.1 t-year)を用いて、初めてのWIMPとキセノン原子核との反跳事象の探索の結果を取りまとめ、Physical Review Letters誌に発表した。結果として、WIMPの有意な信号は見つからず、WIMPと核子とのスピン非依存型散乱断面積の上限値として、2.58x10^-47 cm^2(28GeV質量WIMP対して)を得た。引き続き、内部ラドン量の低減を図りながら、XENONnT実験のデータ取得を続け、太陽ニュートリノによる原子核反跳や太陽ppニュートリノの電子散乱の初検出へ向けた準備を行なった。
将来の50トン級の超大型液体キセノン検出器を用いた暗黒物質探索実験に向けて、密閉型TPC検出器の要素開発とテストベンチの構築を進めた。石英フランジ容器のラドン阻止能力については、フランジデザインの改善を行うと共に、フランジ圧とリークレートの関係の評価を行なった。また、液相1相式TPCへの応用を目指して、石英細線コーティング電極について、液体キセノン中での比例蛍光を起こすのに十分な電場勾配達成が可能な電極デザインを行い、また実際に細線電極の試作を行なった。
これら将来の液体希ガスTPC検出器についての要素技術の開発研究成果の発信と研究交流を行う国際研究会”Nagoya Workshop on Technology and Instrumentation in Future Liquid Noble Gas Detectors"を、2月14-16日に名古屋大学KMIにおいて開催した。国内外から44名の液体キセノン、液体アルゴンTPC検出器の専門家が集結し、新たな光検出器、バックグランド低減、電極構造の設計などについて情報交換を行った。

Research Progress Status

令和5年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和5年度が最終年度であるため、記入しない。

  • Research Products

    (38 results)

All 2024 2023 Other

All Int'l Joint Research (6 results) Journal Article (8 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (18 results) (of which Int'l Joint Research: 11 results,  Invited: 12 results) Remarks (5 results) Funded Workshop (1 results)

  • [Int'l Joint Research] Max-Planck-Institute Kernphysik/Universitat Freiburg/Johannes Gutenberg- Universitat Mainz(ドイツ)

    • Country Name
      GERMANY
    • Counterpart Institution
      Max-Planck-Institute Kernphysik/Universitat Freiburg/Johannes Gutenberg- Universitat Mainz
    • # of Other Institutions
      2
  • [Int'l Joint Research] University of Bologna/University of Torino/University of Napoli(イタリア)

    • Country Name
      ITALY
    • Counterpart Institution
      University of Bologna/University of Torino/University of Napoli
    • # of Other Institutions
      2
  • [Int'l Joint Research] Columbia University/University of Chicago/Purdue University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Columbia University/University of Chicago/Purdue University
    • # of Other Institutions
      2
  • [Int'l Joint Research] University of Zurich(スイス)

    • Country Name
      SWITZERLAND
    • Counterpart Institution
      University of Zurich
  • [Int'l Joint Research] Tsinghua University(中国)

    • Country Name
      CHINA
    • Counterpart Institution
      Tsinghua University
  • [Int'l Joint Research]

    • # of Other Countries
      4
  • [Journal Article] Design and performance of the field cage for the XENONnT experiment2024

    • Author(s)
      E. Aprile et al. XENON collaboration
    • Journal Title

      European Physical Journal C

      Volume: 84, 138 Pages: 1-12

    • DOI

      10.1140/epjc/s10052-023-12296-y

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Searching for Heavy Dark Matter near the Planck Mass with XENON1T2023

    • Author(s)
      E. Aprile et al. XENON collaboration
    • Journal Title

      Physical Review Letters

      Volume: 130, 261002 Pages: 1-8

    • DOI

      10.1103/PhysRevLett.130.261002

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Detector signal characterization with a Bayesian network in XENONnT2023

    • Author(s)
      E. Aprile et al. XENON collaboration
    • Journal Title

      Physical Review D

      Volume: 108, 012016 Pages: 1-11

    • DOI

      10.1103/PhysRevD.108.012016

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment2023

    • Author(s)
      E. Aprile et al. XENON collaboration
    • Journal Title

      Physical Review Letters

      Volume: 131, 041003 Pages: 1-9

    • DOI

      10.1103/PhysRevLett.131.041003

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The triggerless data acquisition system of the XENONnT experiment2023

    • Author(s)
      E. Aprile et al. XENON collaboration
    • Journal Title

      Journal of Instrumentation

      Volume: 18 P07054 Pages: 1-27

    • DOI

      10.1088/1748-0221/18/07/P07054

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Low-energy calibration of XENON1T with an internal Ar37 source2023

    • Author(s)
      E. Aprile et al. XENON collaboration
    • Journal Title

      European Physical Journal C

      Volume: 83, 542 Pages: 1-15

    • DOI

      10.1140/epjc/s10052-023-11512-z

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mineral detection of neutrinos and dark matter. A whitepaper2023

    • Author(s)
      S. Baum et al.
    • Journal Title

      Physics of the Dark Universe

      Volume: 41, 101245 Pages: 1-53

    • DOI

      10.1016/j.dark.2023.101245

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct dark matter searches with the full data set of XMASS-I2023

    • Author(s)
      K. Abe et al
    • Journal Title

      Physical Review D

      Volume: 108, 083022 Pages: 1-19

    • DOI

      10.1103/PhysRevD.108.083022

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] キセノンガス中の微量水素量測定法の開発2024

    • Author(s)
      小林雅俊
    • Organizer
      日本物理学会2024年春季大会
  • [Presentation] DARWIN実験のためのハイブリッド光検出器の開発2024

    • Author(s)
      風間慎吾
    • Organizer
      日本物理学会2024年春季大会
  • [Presentation] Status of XENONnT and the final results of XMASS2024

    • Author(s)
      S. Moriyama
    • Organizer
      UGAP2024
    • Int'l Joint Research / Invited
  • [Presentation] Next Generation Direct Dark Matter Search with LXe2024

    • Author(s)
      M. Yamashita
    • Organizer
      UGAP2024
    • Invited
  • [Presentation] Xenon Purification for the low background experiment2024

    • Author(s)
      Masaki Yamashitaq
    • Organizer
      Nagoya Workshop on Technology and Instrumentation in Future Liquid Noble Gas Detectors
    • Int'l Joint Research / Invited
  • [Presentation] Low Dark-Count VUV SiPMs for the DARWIN Experiment2024

    • Author(s)
      S.Kazama
    • Organizer
      Nagoya Workshop on Technology and Instrumentation in Future Liquid Noble Gas Detectors
    • Int'l Joint Research / Invited
  • [Presentation] The development of hermetic TPC for the DARWIN experiment2024

    • Author(s)
      M.Kobayashi
    • Organizer
      Nagoya Workshop on Technology and Instrumentation in Future Liquid Noble Gas Detectors
    • Int'l Joint Research / Invited
  • [Presentation] 暗黒物質直接探索の現状と展望2023

    • Author(s)
      風間慎吾
    • Organizer
      IPNS workshop 素粒子物理の今と未来
    • Invited
  • [Presentation] Direct Detection of Particle Dark Matter2023

    • Author(s)
      S. Moriyama
    • Organizer
      QUPosium2023
    • Int'l Joint Research / Invited
  • [Presentation] XLZD: Ultimate WIMP Dark Matter Search2023

    • Author(s)
      Masaki Yamashitaq
    • Organizer
      International Workshop on "Double Beta Decay and Underground Science"
    • Int'l Joint Research / Invited
  • [Presentation] Results and Prospects for XENONnT Experiment2023

    • Author(s)
      Masaki Yamashita
    • Organizer
      International Workshop on "Double Beta Decay and Underground Science"
    • Int'l Joint Research / Invited
  • [Presentation] Direct Dark Matter Search with _XENON and DARWIN2023

    • Author(s)
      S.Kazama
    • Organizer
      Symposium on Frontiers of Underground Physics
    • Int'l Joint Research / Invited
  • [Presentation] DARWIN/XLZDによる次世代暗黒物質直接探索実験2023

    • Author(s)
      山下雅樹
    • Organizer
      日本物理学会第78回年次大会
  • [Presentation] XENONnT実験による太陽ニュートリノの探索2023

    • Author(s)
      小林雅俊
    • Organizer
      日本物理学会第78回年次大会
  • [Presentation] XENONnT実験の現状報告2023

    • Author(s)
      風間慎吾
    • Organizer
      日本物理学会第78回年次大会
  • [Presentation] The purification system for the XENONnT dark matter search experiment2023

    • Author(s)
      M.Kobayashi
    • Organizer
      The 38th International Cosmic Ray Conference 2023
    • Int'l Joint Research
  • [Presentation] Dark Matter Experiments2023

    • Author(s)
      Y.Itow
    • Organizer
      KPS-JPS Joint Symposium, 2023 KPS Spring Meeting
    • Int'l Joint Research / Invited
  • [Presentation] Overview of direct DM detections2023

    • Author(s)
      Y.Itow
    • Organizer
      The 3rd DMNet International Symposium “Dark Matter Studies in Accelerator Physics”
    • Int'l Joint Research / Invited
  • [Remarks] 名古屋大学宇宙地球環境研究所宇宙線研究部・暗黒物質直接探索

    • URL

      https://www.isee.nagoya-u.ac.jp/CR/research/direct_dm/

  • [Remarks] 名古屋大学素粒子宇宙起源研究所現象解析研究部門

    • URL

      https://www.kmi.nagoya-u.ac.jp/research-center/ce/

  • [Remarks] 暗黒物質国際創生ユニット

    • URL

      https://www.aip.nagoya-u.ac.jp/wp-content/uploads/2023/12/db4bc3fabd2f63510fa6206f30e3cd04.pdf

  • [Remarks] 暗黒物質国際創生ユニット

    • URL

      https://www.kmi.nagoya-u.ac.jp/dmunit/

  • [Remarks] XENONnT実験による最初のWIMP暗黒物質探索の結果

    • URL

      https://www.kmi.nagoya-u.ac.jp/blog/2023/03/23/4880/

  • [Funded Workshop] Nagoya Workshop on Technology and Instrumentation in Future Liquid Noble Gas Detectors2024

URL: 

Published: 2024-12-25  

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