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最高エネルギーでの新粒子および新しい素粒子現象の探索

Research Project

Project/Area Number 11202201
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionThe University of Tokyo

Principal Investigator

駒宮 幸男  東京大学, 大学院・理学系研究科, 教授 (80126060)

Co-Investigator(Kenkyū-buntansha) 山下 了  東京大学, 素粒子物理国際研究センター, 助教授 (60272465)
真下 哲郎  東京大学, 素粒子物理国際研究センター, 助教授 (60181640)
小林 富雄  東京大学, 素粒子物理国際研究センター, 教授 (50126059)
三原 智  東京大学, 素粒子物理国際研究センター, 助手 (80292837)
浅井 祥仁 (浅井 祥二)  東京大学, 素粒子物理国際研究センター, 助教授 (60282505)
竹下 徹  信州大学, 理学部, 助教授 (70154995)
武田 廣  神戸大学, 理学部, 教授 (30126114)
Project Period (FY) 1999 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥201,600,000 (Direct Cost: ¥201,600,000)
Fiscal Year 2003: ¥35,100,000 (Direct Cost: ¥35,100,000)
Fiscal Year 2002: ¥35,100,000 (Direct Cost: ¥35,100,000)
Fiscal Year 2001: ¥36,300,000 (Direct Cost: ¥36,300,000)
Fiscal Year 2000: ¥49,500,000 (Direct Cost: ¥49,500,000)
Fiscal Year 1999: ¥45,600,000 (Direct Cost: ¥45,600,000)
Keywords素粒子物理 / 電子・陽電子衝突実験 / エネルギーフロンティア / 新粒子探索 / ヒッグス粒子 / 超対称性粒子 / 高エネルギー物理学 / 超対称性大統一理論 / 電子・陽電子衝突型加速器 / エネルギーフロンディアー
Research Abstract

最重要課題であるヒッグス粒子の探索や超対称性粒子の探索の包括的な解析を行なってきた。常に新しいアイデアを取り入れるよう心がけ、かつ重点項目に研究を集中するように留意した。
ヒッグス粒子の探索では、素粒子物理にインパクトを与える重要な結果を得ている。平成15年度には標準模型ヒッグス粒子探索に関してLEP4実験の結果を統合した最終論文を発表した。標準理論的なヒッグス粒子の質量をほぼ115~GeV付近まで棄却し、電弱統一ゲージ理論の精密測定から約200GeV以上の質量を持つヒッグスボゾンを棄却したことは特筆に値する。これは将来の最高エネルギーでの研究の指針となり、LHCやリニアコライダーでの発見と詳細研究にますます期待がかかる。
標準理論を超える理論として最も有力で、重力も含む4つの力の統一を実現する可能性を持つ超対称性理論の予言する新粒子群を系統的に探索し、理論に対して更に強い制限を課した。これらをいくつかの論文に纏め、投稿した。
研究班「精密測定による素粒子相互作用の研究」と協同で、最近理論的研究の進む余剰次元に対する研究も行なった。精密測定の結果を用い、余剰次元のサイズが大きいと見えてくる重力子などの影響をOPALデータを用いて詳細に調べ、超次元の次元数とその大きさに制限をつけ論文を準備中である。
昨年からNon-commutableのQEDのような新しい理論的提案に対する実験的研究も進めている。現在、我々の銀河系はおとめ座の方向に重力によって落ちているため、宇宙の2.7°K背景輻射の絶対静止系に対して我々の銀河系は動いていると考えられる。Non-commutableのQEDではこの様な運動をe+e-衝突実験の精密測定で測定できる可能性があるため、e+e-→γγのデータを用い、この理論におけるエネルギースケールの下限値を求める論文を発表した。

Report

(5 results)
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (38 results)

All Other

All Publications (38 results)

  • [Publications] The OPAL Collaboration, G.Abbiendi, et al.: "Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion-Pair Production at 189-209 GeV at LEP"Eur.Phys.J.C. In press. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi, et al.: "Search for Anomalous Production of Di-lepton Events with Missing Transverse Momentum in e+e- Collisions at sqrt(s)= 183-209 GeV"Eur.Phys.J.C. In press. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi, et al.: "Search for Stable and Long-lived Massive Charged Particles in e+e- Collisions at sqrt(s)= 183-209 GeV"Phys.Lett.B. 572. 8-20 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] The ALEPH, DELPHI, L3, OPAL Collaboration: "Search for the Standard Model Higgs Boson at LEP"Phys.Lett.B. 565. 61-75 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi, et al.: "Test of Non-commutative QED in the Process e+e-to gamma gamma at LEP"Phys.Lett.B. 568. 181-190 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi, et al.: "Bose-Einstein Correlation of Pizero Pairs from Hadronic ZO Decay"Phys.Lett.B. 559. 131-143 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for the Standard Model Higgs Boson with the OPAL Detector at LEP"Eur.Phys.J.C. 26. 479-503 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Search for Leptoquarks in Electron-Photon Scattering at sqrt(s_ee) up to 209 GeV at LEP"Phys.Lett.B. 526. 233-246 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Search for Doubly Charged Higgs Bosons with the OPAL detector at LEP"Phys.Lett.B. 526. 221-232 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Search for Scalar Top and Scalar Bottom Quarks at LEP"Phys.Lett.B. 545. 272-284 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Search for Associated Production of Massive State Decaying into Two Photons in e+e-Annihilation at sqrt(s)=88-209 GeV"Phys.Lett.B. 544. 44-56 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Search for charged excited leptons in e+e-collisions at sqrt(s)183-209 GeV"Phys.Lett.B. 544. 57-72 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Search for Yukawa Production of a Light Neutral Higgs Boson at LEP"CERN-EP-2001-077, Accepted by Eur. Phys. J. C.. 077. (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Search for lepton flavour violation in e+e-collisions at sqrt(s)=189-209 GeV"Phys. Letts.. B519. 23-32 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Search for the Standard Model Higgs Boson in e+e-Collisions at sqrt(s)=192-209 GeV"Phys. Lett.. B499. 38-52 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Two Higgs Doublet Model and Model Independent Interpretation of Neutral Higgs Boson Searches"Eur. Phys. J.. C18. 425-445 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] The OPAL Collaboration, G.Abbiendi et al.: "Searches for Prompt Light Gravitino Signatures in e+e-Collisions at sqrt(s)=189 GeV"Phys. Lett.. B501. 12-27 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Search for the Standard Model Higgs Boson in e+e- Collisions at sqrt (s) =192-209 GeV"Phys.Lett.. B. 38-52 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Two Higgs Doublet Model and Model Independent Interpretation of Neutral Higgs Boson Searches"Eur.Phys.J.. C(Accepted). (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Searches for Prompt Light Gravitino Signatures in e+e- Collisions at sqrt (s) =189 GeV"Phys.Lett.. B(Accepted). (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Photonic Events with Missing Energy in e+e- Collisions at sqrt (s) =189 GeV"Eur.Phys.J.. C18. 253-242 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Search for New Physics in Rare B Decays"Phys.Lett.. B476. 233-242 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Search for Unstable Heavy and Excited Leptons at LEP2"Eur.Phys.J.. C14. 73-84 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Search for Chargino and neutralino Production at sqrt (s)=189 GeV at LE"Eur.Phys.J.. C14. 187-198 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Search for Anomalous Production of Acoplanar Di-lepton Events in e^+e- collisions at sqrt (s)=183 and 189 GeV"Eur.Phys.J.. C14. 51-71 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Search for pair-produced leptoquarks in e+e- interactions at sqrt (s) =183 GeV"Eur.Phys.J.. C13. 15-27 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Search for Neutral Higgs Bosons in e+e- Collisions at sqrt (s) -189 GeV"Eur.Phys.J.. C12. 567-586 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration,G.Abbiendi et al.: "Search for R-parity Violating Decays of Scalar Fermions at LEP"Eur.Phys.J.. C12. 1-24 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for Neutral Higgs Bosons in e^+e^- Collisions at √<>sim189 GeV"(Accepted) Eur. Phys. J.C. C. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for Higgs Bosons and Other Massive States Decaying into Two Photons in e^+e^- Collisions at 189 GeV"Phys. Lett.. B464. 311-322 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for Higgs Bosons in e^+e^- Collisions at 183 Gev"Eur. Phys. J.. C7. 407-435 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for Chargino and neutralino Production at √<>s 189 GeV at LEP"(Accepted) Eur. Phys. J.. C. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for Anomalous Production of Acoplanar Di-lepton Events in e^+e^- Collisions at √<>s 183 and 189 GeV"(Accepted) Eur. Phys. J.. C. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for Scalar Top and Scalar Bottom Quarks at E_<CM> 189 GeV at LEP"Phys. Lett.. B456. 95-106 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for Anomalous Photonic Events with Missing Energy in e^+e^- Collisions at √<>s 130, 136 and 183 GeV"Eur. Phys. J.. C8. 23-40 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for Chargino and Neutralino Production at √<>s 181-184 GeV at LEP"Eur. Phys. J.. C8. 255-272 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for pair-produced leptoquarks in e^+e^- interactions at √<>s 183 GeV"(Accepted) Eur. Phys. J.. C. (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] The OPAL Collaboration, G. Abbiendi et al.: "Search for R-parity Violating Decays of Scalar Fermions at LEP"Eur. Phys. J.. C12. 1-24 (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2018-03-28  

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