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軽いスカラー粒子を含む電弱カイラル有効理論による新物理の探索

Research Project

Project/Area Number 14J03947
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionNagoya University

Principal Investigator

長井 遼  名古屋大学, 理学研究科, 特別研究員(DC1)

Project Period (FY) 2014-04-25 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2016: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2015: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2014: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywordsヒッグス粒子 / LHC実験 / ユニタリティ / スピン1粒子 / ユニタリティー / 電弱精密測定
Outline of Annual Research Achievements

2012年に大型ハドロン衝突型加速器(LHC)実験によってヒッグス粒子が発見され、素粒子標準模型が確立されて以降、素粒子標準模型を超える新物理探索が精力的に行われている。そこで申請者は、"ユニタリティ(確率の保存則)"という理論が満たすべき性質に着目して、模型の詳細に立ち入らない立場から素粒子標準模型を超える新物理の可能性について検討した。まず申請者は、TeVスケールに新たなスピン1粒子が存在する可能性について調べた。このような新たなスピン1粒子は、電弱対称性の拡張を伴う新物理模型や、動力学的に電弱対称性を破るような新物理模型にしばしば現れる。LHC実験でもこのようなスピン1粒子の実験的探索がなされており、この実験探索は、スピン1粒子がクォークやレプトンに崩壊する場合、つまり、フェルミオンに崩壊する場合だけでなく、スピン1粒子が電弱ゲージ粒子やヒッグス粒子とったボソンに崩壊する場合についても精力的になされている。本年度の研究において、申請者は、摂動論的ユニタリティという理論的要請のみを使って、スピン1粒子のボソン崩壊が抑制されることを見出した。この成果は、将来新たなスピン1粒子のボソン崩壊が発見された場合に、仮定された理論的性質が成り立たず、スピン1粒子以外の新たな粒子探索に示唆を与えるものである。この研究成果は学術論文としてまとめた。また、新たなスピン1粒子を含む新物理探索に加え、前年度に引き続き、拡張ヒッグス模型など新たなスピン0粒子を含む模型の研究についても共同研究者とともに議論をすすめた。特に、荷電スカラー粒子を含む新物理模型に関して、摂動論的ユニタリティと理論のくりこみ可能性との間に新たに非自明な関係を見出すことができている。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • Research Products

    (34 results)

All 2017 2016 2015 2014

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results,  Acknowledgement Compliant: 4 results) Presentation (30 results) (of which Int'l Joint Research: 8 results,  Invited: 4 results)

  • [Journal Article] Classification of simple heavy vector triplet models2017

    • Author(s)
      阿部智広, 長井 遼
    • Journal Title

      Physical Review D

      Volume: 95 Issue: 7 Pages: 075022-075022

    • DOI

      10.1103/physrevd.95.075022

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Unitarity sum rules, three site moose model, and the ATLAS 2TeV diboson anomalies2015

    • Author(s)
      阿部 智広、長井 遼、大川 翔平、棚橋 誠治
    • Journal Title

      Physical Review D

      Volume: 92

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Effective theories for dark matter nucleon scattering2015

    • Author(s)
      久野 純治、長井 遼、永田 夏海
    • Journal Title

      Journal of High Energy Physics

      Volume: 2015 Pages: 37-37

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Does unitarity imply finiteness of electroweak oblique corrections at one loop? -constraining extra neutral Higgs bosons-2015

    • Author(s)
      長井 遼、棚橋 誠治、津村 浩二
    • Journal Title

      Physical Review D

      Volume: 91

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Perturbative Unitarity vs. Electroweak Precision Tests in Extended Higgs Sectors2017

    • Author(s)
      長井 遼
    • Organizer
      Toyama International Workshop on Higgs as a Probe of New Physics 2017
    • Place of Presentation
      富山大学
    • Year and Date
      2017-03-03
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Classification of simple W' models2017

    • Author(s)
      長井 遼
    • Organizer
      KEK Theory Meeting on Particle Phenomenology 2017
    • Place of Presentation
      高エネルギー加速器研究機構
    • Year and Date
      2017-02-16
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Sum rules for extended electroweak symmetry breaking sectors2016

    • Author(s)
      長井 遼
    • Organizer
      東北大学 素粒子論グループセミナー
    • Place of Presentation
      東北大学
    • Year and Date
      2016-12-22
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] ユニタリティ和則とW'/Z'の現象論2016

    • Author(s)
      長井 遼
    • Organizer
      日本物理学会2016年 秋季大会
    • Place of Presentation
      宮崎大学
    • Year and Date
      2016-09-23
    • Related Report
      2016 Annual Research Report
  • [Presentation] Classification of simple heavy vector triplet models2016

    • Author(s)
      長井 遼
    • Organizer
      基研研究会 素粒子物理学の進展2016
    • Place of Presentation
      京都大学 基礎物理学研究所
    • Year and Date
      2016-09-05
    • Related Report
      2016 Annual Research Report
  • [Presentation] Classification of simple heavy vector triplet models2016

    • Author(s)
      長井 遼
    • Organizer
      第18回新ヒッグス勉強会
    • Place of Presentation
      富山大学
    • Year and Date
      2016-08-16
    • Related Report
      2016 Annual Research Report
  • [Presentation] Unitarity sum rules and their implications2016

    • Author(s)
      長井 遼
    • Organizer
      KEK 素粒子論グループセミナー
    • Place of Presentation
      高エネルギー加速器研究機構
    • Year and Date
      2016-04-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Unitarity sum rules and their implications2016

    • Author(s)
      長井 遼
    • Organizer
      KEK素粒子論グループセミナー
    • Place of Presentation
      KEK
    • Year and Date
      2016-04-15
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] RG effect on WIMP-nucleon twist-2 operators2016

    • Author(s)
      長井 遼
    • Organizer
      松江素粒子物理学研究会
    • Place of Presentation
      島根大学
    • Year and Date
      2016-03-25
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Perturbative unitarity and W' coupling2016

    • Author(s)
      長井 遼
    • Organizer
      WRU Symposium 2016 "Interplay between LHC and Flavour Physics"
    • Place of Presentation
      名古屋大学
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Perturbative unitarity and Higgs boson(s)2016

    • Author(s)
      長井 遼
    • Organizer
      Symposium; New Generation Quantum Theory -Particle Physics, Cosmology, and Chemistry-
    • Place of Presentation
      京都大学
    • Year and Date
      2016-03-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Perturbative unitarity and W' coupling2016

    • Author(s)
      長井 遼
    • Organizer
      KEK Theory Meeting on Particle Physics Phenomenology
    • Place of Presentation
      KEK
    • Year and Date
      2016-02-09
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effective Theories for Dark Matter Nucleon Scattering2015

    • Author(s)
      長井 遼
    • Organizer
      日本物理学会2015年 秋季大会
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2015-09-25
    • Related Report
      2015 Annual Research Report
  • [Presentation] The ATLAS 2TeV diboson anomalies and perturbative unitarity2015

    • Author(s)
      長井 遼
    • Organizer
      基研研究会 素粒子物理学の進展2015
    • Place of Presentation
      基礎物理学研究所
    • Year and Date
      2015-09-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] Unitarity sum rules, three site moose model, and the ATLAS 2TeV diboson anomalies2015

    • Author(s)
      長井 遼
    • Organizer
      Kavli-IPMU-Durham-KIAS workshop: New particle searches confronting the first LHC run-2 data
    • Place of Presentation
      Kavli-IPMU
    • Year and Date
      2015-09-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Unitarity, Electroweak Precision Physics, and Higgs Coupling/The ATLAS 2TeV diboson amomalies and Unitarity sum rules2015

    • Author(s)
      長井 遼
    • Organizer
      北海道大学 素粒子論セミナー
    • Place of Presentation
      北海道大学
    • Year and Date
      2015-07-24
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Unitarity and Finiteness of Electroweak oblique corrections in extended Higgs sectors2015

    • Author(s)
      長井 遼
    • Organizer
      東京大学(本郷)素粒子論セミナー
    • Place of Presentation
      東京大学(本郷)
    • Year and Date
      2015-06-01
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Unitarity of Extended Higgs Sector2015

    • Author(s)
      長井 遼
    • Organizer
      Asian Linear Collider Workshop
    • Place of Presentation
      KEK
    • Year and Date
      2015-04-20
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Unitarity and Electroweak Oblique Corrections2015

    • Author(s)
      津村 浩二
    • Organizer
      The 2nd Joint Kyoto-NTU High Energy Theory Workshop
    • Place of Presentation
      台湾
    • Year and Date
      2015-03-27 – 2015-03-29
    • Related Report
      2014 Annual Research Report
  • [Presentation] Tree level unitarity and the finiteness of electroweak oblique parameters2015

    • Author(s)
      長井 遼
    • Organizer
      Sakata Memorial KMI Workshop on “Origin of Mass and Strong Coupling Gauge Theories” (SCGT15)
    • Place of Presentation
      名古屋大学
    • Year and Date
      2015-03-03 – 2015-03-06
    • Related Report
      2014 Annual Research Report
  • [Presentation] Tree level unitarity and the finiteness of electroweak oblique parameters2015

    • Author(s)
      長井 遼
    • Organizer
      Toyama International Workshop on “Higgs as a Probe of New Physics 2015”(2015)
    • Place of Presentation
      富山大学
    • Year and Date
      2015-02-11 – 2015-02-15
    • Related Report
      2014 Annual Research Report
  • [Presentation] Tree level unitarity and the finiteness of electroweak oblique parameters2015

    • Author(s)
      長井 遼
    • Organizer
      The 12th Regular Meeting of New Higgs Working Group
    • Place of Presentation
      富山大学
    • Year and Date
      2015-01-10 – 2015-01-11
    • Related Report
      2014 Annual Research Report
  • [Presentation] Constraining extra neutral Higgs bosons from unitarity and the electroweak precision data2014

    • Author(s)
      棚橋 誠治
    • Organizer
      Second KIAS-NCTS Joint Workshop on Particle Physics, String Theory and Cosmology
    • Place of Presentation
      台湾
    • Year and Date
      2014-12-26 – 2014-12-28
    • Related Report
      2014 Annual Research Report
  • [Presentation] Tree level unitarity and the finiteness of electroweak oblique corrections2014

    • Author(s)
      長井 遼
    • Organizer
      富山大学理論物理セミナー
    • Place of Presentation
      富山大学
    • Year and Date
      2014-11-28
    • Related Report
      2014 Annual Research Report
  • [Presentation] Constraints on extra neutral Higgs bosons through the Higgs coupling measurement2014

    • Author(s)
      長井 遼
    • Organizer
      International Workshop on future linear colliders -LCWS2014-
    • Place of Presentation
      セルビア ベオグラード
    • Year and Date
      2014-11-06 – 2014-11-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] Does unitarity imply finiteness of electroweak oblique corrections at one loop? -constraining extra neutral Higgs bosons-2014

    • Author(s)
      長井 遼
    • Organizer
      KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH 2014)
    • Place of Presentation
      KEK
    • Year and Date
      2014-10-21 – 2014-10-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] 電弱カイラルラグランジアンを用いたヒッグスセクターに関する新物理探索2014

    • Author(s)
      長井 遼
    • Organizer
      日本物理学会 2014 年 秋季大会
    • Place of Presentation
      佐賀大学
    • Year and Date
      2014-09-18 – 2014-09-21
    • Related Report
      2014 Annual Research Report
  • [Presentation] Constraining extended electroweak symmetry breaking scenarios using the unitarity sum rules and the oblique parameters2014

    • Author(s)
      長井 遼
    • Organizer
      Summer Institute 2014 -Phenomenology of Elementary Particles and Cosmology-
    • Place of Presentation
      富士吉田
    • Year and Date
      2014-08-21 – 2014-08-28
    • Related Report
      2014 Annual Research Report
  • [Presentation] Constraining extended electroweak symmetry breaking scenarios using the unitarity sum rules and the oblique parameters2014

    • Author(s)
      長井 遼
    • Organizer
      原子核三者若手夏の学校 2014
    • Place of Presentation
      パノラマランド木島平
    • Year and Date
      2014-08-04 – 2014-08-09
    • Related Report
      2014 Annual Research Report
  • [Presentation] ヒッグス粒子とゲージボソンの結合定数から探る拡張ヒッグスセクターの可能性2014

    • Author(s)
      長井 遼
    • Organizer
      加速器・物理合同 ILC 夏の合宿 2014
    • Place of Presentation
      関金温泉
    • Year and Date
      2014-07-19 – 2014-07-22
    • Related Report
      2014 Annual Research Report

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Published: 2015-01-22   Modified: 2024-03-26  

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