The Next Generation T-Violation Experiment (TRIUMF-MTV experiment)

• Project/Area Number: 25287061
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Rikkyo University
• Principal Investigator: MURATA Jiro 立教大学, 理学部, 教授 (50360649)
• Research Collaborator: TANAKA Saki ; TANUMA Ryosuke ; OZAKI Sachi ; SAKAMOTO Yuko ; YOSHIDA Tatsuru
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000); Fiscal Year 2015: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2013: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
• Keywords: 対称性 / ベータ崩壊 / 時間反転 / 放射線検出器 / 原子核

Outline of Final Research Achievements

We execute an experimental attempt, TRIUMF-MTV experiment, to search T-Violating electron’s transverse polarization in nuclear beta decay. Especially, we build the next generation experimental setup using cylindrical drift chamber. Then, systematic effects, which is expected in the physics data taking, are investigated. As a result, the origin of the systematics effect is identified. This result lead us to execute the real physics data taking by suppressing and estimating the systematic effects.

Research Products

• [Int'l Joint Research] TRIUMF(Canada)
• [Journal Article] Development of a novel scintillation-trigger detector for the MTV experiment using aluminum-metallized film tapes (2014)
  • Author(s): S. Tanaka, S.Ozaki, Y.Sakamoto, R.Tanuma, T.Yoshida, J.Murata
  • Journal Title: NuclearInstrumentsandMethodsin Physics Research A Volume: 752 Pages: 47-53
  • DOI: 10.1016/j.nima.2014.03.025
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] T-Violation experiment at TRIUMF-ISAC using polarized 8Li (2014)
  • Author(s): J. Murata, H. Baba, J.A. Behr, T. Iguri, M. Ikeda, H. Kawamura, R. Kishi, C.D.P. Levy, Y. Nakaya, R. Narikawa, K. Ninomiya, J. Onishi, R. Openshaw, M. Pearson, E. Seitaibashi, S. Saiba, S. Tanaka, R. Tanuma, Y. Totsuka and T. Toyoda
  • Journal Title: EPJ Web of Conferences Volume: 66 Pages: 05017-05017
  • DOI: 10.1051/epjconf/20146605017
  • Peer Reviewed
• [Journal Article] Report of the next generation TRIUMF-MTV experiment Run-IV using Cylindrical Drift Chamber (2014)
  • Author(s): R. Tanuma,E. Seitaibashi, H. Baba, H. Kawamura, J.A. Behr, J. Onishi, K. Ninomiya, M. Pearson, M. Ikeda, P. Levy, R. Narikawa, R. Openshaw, S. Tanaka, S. Saiba, T. Iguri, Y. Totsuka, Y. Nakaya and J. Murata
  • Journal Title: JPS Conf. Proc. Volume: 1
  • DOI: 10.7566/jpscp.1.013069
  • Peer Reviewed
• [Journal Article] The MTV experiment: a test of time reversal symmetry using polarized 8Li (2013)
  • Author(s): J. Murata, H. Baba, J. A. Behr, Y. Hirayama, T. Iguri, M. Ikeda, T. Kato, H. Kawamura, R. Kishi, C. D. P. Levy, Y. Nakaya, K. Ninomiya, N. Ogawa, J. Onishi, R. Openshaw, M. Pearson, E. Seitaibashi, S. Tanaka, R. Tanuma, Y. Totsuka, T. Toyoda
  • Journal Title: Hyperfine Interactions Volume: 225 Issue: 1-3 Pages: 193-196
  • DOI: 10.1007/s10751-013-0897-3
  • Peer Reviewed
• [Presentation] TRIUMF-MTV実験の為のスピンフリップに同期する系統性抑制法の開発 (2016)
  • Author(s): 坂元祐子, 馬場秀忠, 榎園昭智, 後藤文也, 羽取美令, 稲葉尚輝, 川村広和, 北口雅暁, 益田英和, 長島徹, 二宮一史, Robert Openshaw, 尾崎早智, Matthew Pearson, 清水裕彦, 清水裕太, 田中祐太郎, 田沼良介, 渡辺悦子, 横橋麻美, 村田次郎
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 東北学院大学（宮城県・仙台市）
  • Year and Date: 2016-03-19
• [Presentation] Report from the MTV experiment searching T-Violation in polarized Li-8 at ISAC (2015)
  • Author(s): Jiro Murata
  • Organizer: TRIUMF Nuclear Physics Seminar
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 2015-08-31
  • Invited
• [Presentation] The MTV experiment : Searching T-Violation in polarized Li-8 at TRIUMF (2015)
  • Author(s): Jiro Murata
  • Organizer: the 6th International Symposium on Symmetries in Subatomic Physics
  • Place of Presentation: Victoria, Canada
  • Year and Date: 2015-06-08
  • Int'l Joint Research
• [Presentation] TRIUMFにおける時間反転対称性の破れ探索実験（MTV Run-II）の報告 (2015)
  • Author(s): 田沼良介，馬場秀忠，John A Behr，井栗威，池田めい，川村広和，岸礼子，Phil. Levy，中谷祐輔，二宮一史，西尾悠法，大西潤一，Robert Openshaw，小川就也，尾崎早智，Matthew Pearson，聖代橋悦子，坂元祐子，田中佐季，戸塚祐実，豊田健司，吉田立，渡邉健太郎，村田次郎
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学（東京都・新宿区）
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] CDCを用いたMTV/MTV-G実験の為の系統性の調査 (2015)
  • Author(s): 尾崎早智，長島徹，中谷祐輔，二宮一史，大西潤一，Robert Openshaw，Matthew Pearson，齋場俊太朗，坂元祐子，清水裕太，田中佐季，田沼良介，戸塚祐実，渡辺悦子，吉田立，村田次郎
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学（東京都・新宿区）
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] T-Violation experiment using polarized Li-8 at TRIUMF (2014)
  • Author(s): Jiro Murata
  • Organizer: 4th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
  • Place of Presentation: ハワイ （米国）
  • Year and Date: 2014-10-07 – 2014-10-11
• [Presentation] Development of a new scintillation-trigger detector for the MTV experiment using aluminum-metallized film tape (2014)
  • Author(s): Yuko Sakamoto, Sachi Ozaki, Saki Tanaka, Ryosuke Tanuma, Tatsuru Yoshida, Jiro Murata
  • Organizer: 4th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
  • Place of Presentation: ハワイ （米国）
  • Year and Date: 2014-10-07 – 2014-10-11
• [Presentation] CDCを用いた時間反転対称性の破れ探索実験（MTV実験Run-V）の報告 (2014)
  • Author(s): 田沼良介, 馬場秀忠，John A Behr，井栗威，池田めい，川村広和，齋場俊太朗，Phil Levy，中谷祐輔，二宮一史，大西潤一，尾崎早智，Robert Openshaw，Matthew Pearson，聖代橋悦子，田中佐季，坂元裕子，戸塚祐実，吉田立，村田次郎
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学 湘南キャンパス（神奈川県）
• [Presentation] Status of the MTV experiment at TRIUMF: Test of time reversal symmetry using polarized Li-8 (2014)
  • Author(s): Jiro Murata
  • Organizer: Solvay Workshop
  • Place of Presentation: Brussels, Belgium
  • Invited
• [Presentation] T-Violation experiment at TRIUMF-ISAC using polarized 8Li (2013)
  • Author(s): J. Murata, H. Baba, J.A. Behr, T. Iguri, M. Ikeda, H. Kawamura, R. Kishi, C.D.P. Levy, Y. Nakaya, R. Narikawa, K. Ninomiya, J. Onishi, R. Openshaw, M. Pearson, E. Seitaibashi, S. Saiba, S. Tanaka, R. Tanuma, Y. Totsuka and T. Toyoda
  • Organizer: International Nuclear Physics Conference (INPC2013)
  • Place of Presentation: Firenze, Italy