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

Test of Equivalence Principle and Search for New Short Range Force

Research Project

Project/Area Number 24340045
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

Komamiya Sachio  東京大学, 理学(系)研究科(研究院), 教授 (80126060)

Co-Investigator(Renkei-kenkyūsha) KAMIYA Yoshio  東京大学, 素粒子物理国際研究センター, 助教 (90434323)
YAMAMURA Kazuya  大阪大学, 大学院工学研究科, 准教授 (60240074)
SANUKI Tomoyuki  東北大学, 大学院理学研究科, 准教授 (70323491)
Project Period (FY) 2012-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
Fiscal Year 2014: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2012: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Keywords超冷中性子 / CCD / 量子束縛状態 / 未知短距離力
Outline of Final Research Achievements

In 2013 vertical distribution of the bound states of ultracold neutrons was measured with an accuracy < 1μm, and it agrees with the prediction of quantum mechanics using the Wigner function. This is the first clear result of this type and it was published in Phys. Rev. Let. Based on these studies, new short-range force was searched for by measuring the angular distributions of cold neutron scattering with Xe nuclei. We imposed the best limit for the theory of new short range forces in the range of 0.04nm to 4nm. This result was also published in Phys. Rev. Let. Furthermore, we proposed a new experiment to test the Equivalent Principle in the quantum mechanical environment within an accuracy of 0.1%. In the experiment time development of the quantum states is measured after setting the initial distribution by the neutron chopper. Time evolution of quantum states with different velocities is measured by the neutron pixel detector with high precision.

Report

(5 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (9 results)

All 2015 2014 2013 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results)

  • [Int'l Joint Research] Laue Langevin Institute(ILL)(スイス)

    • Related Report
      2015 Annual Research Report
  • [Int'l Joint Research] Laue Langevin Institute(ILL)(フランス)

    • Related Report
      2014 Annual Research Report
  • [Journal Article] Observation of the Spatial Distribution of Gravitationally Bound States of Ultracold Neutrons and Its Derivation Using the Wigner Function2014

    • Author(s)
      G. Ichikawa and S. Komamiya, Y. Kamiya et al.
    • Journal Title

      Phys. Rev. Lett.

      Volume: 112 Issue: 7 Pages: 071101-071101

    • DOI

      10.1103/physrevlett.112.071101

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observation of the Spatial Distribution of Gravitationally Bound Quantum States of Ultracold Neutrons and Its Derivation2013

    • Author(s)
      Go Ichikawa, Sachio Komamiya et al
    • Journal Title

      Physical Review Letters

      Volume: 112 Pages: 71101-71101

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Presentation] Observation of the Spatial Distribution of Gravitationally Bound States of Ultracold Neutrons and Its Derivation Using the Wigner Function2015

    • Author(s)
      S. Komamiya
    • Organizer
      PSI Physics Seminar
    • Place of Presentation
      Zurich (Switzerland)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 超冷中性子を用いた新物理探索のための実験システムの開発2015

    • Author(s)
      内田 健太
    • Organizer
      日本物理学会
    • Place of Presentation
      東北学院大学(宮城県仙台市)
    • Year and Date
      2015-03-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] 超冷中性子を用いた重力場による量子状態観測実験と中性子用ピクセル検出器の最適化2014

    • Author(s)
      荻野 真由子
    • Organizer
      日本物理学会
    • Place of Presentation
      佐賀大学(佐賀県佐賀市)
    • Year and Date
      2014-09-18
    • Related Report
      2014 Annual Research Report
  • [Presentation] 重力に束縛された超冷中性子の量子状態の観測およびそれを用いた未知短距離力の探索2013

    • Author(s)
      市川豪
    • Organizer
      日本物理学会第68回年次大会
    • Place of Presentation
      広島大学
    • Year and Date
      2013-03-28
    • Related Report
      2012 Annual Research Report
  • [Presentation] Observation of the Spatial Distribution of Gravitationally Bound Quantum States of Ultracold Neutrons with Submicron Spatial Resolution2013

    • Author(s)
      Go Ichikawa, Sachio Komamiya et al
    • Organizer
      the 12th Asian Pacific Physics Conference
    • Place of Presentation
      幕張メッセ 千葉
    • Related Report
      2013 Annual Research Report

URL: 

Published: 2012-04-24   Modified: 2019-07-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi