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Search for physics beyond the Standard Model with lepton flavor

Research Project

Project/Area Number 18H01210
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionYokohama National University (2021-2022)
Saitama University (2018-2020)

Principal Investigator

Sato Joe  横浜国立大学, 大学院工学研究院, 教授 (60322294)

Co-Investigator(Kenkyū-buntansha) 下村 崇  宮崎大学, 教育学部, 准教授 (00447278)
荒木 威  奥羽大学, 歯学部, 講師 (40645884)
上坂 優一  九州産業大学, 理工学部, 特任講師 (60826618)
Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Keywordsレプトンフレーバー / レプトン数 / 大統一理論 / ミューオン / Lμ-Lτ / レプトンフレーバ / タウ / μーτ対称性 / μーτ / ミューオン原子 / レプトン混合 / LμーLτ模型 / 超対称性 / ニュートリノ / Lμ-Lτ模型 / 長寿命粒子 / μe->ee
Outline of Final Research Achievements

We sought to construct a theory of physics beyond the standard model of the article physics, using the conservation and violation of lepton flavor or lepton number, which is strictly conserved in the standard model, as a clue. We have attempted to explain inconsistencies in current experimental observations by extending the Standard Model, and proposed new experiments to observe the degree of violation. We also actively made predictions for future experiments. At the same time, we also tried to construct a new model. Specifically, we examined the possibility of embedding a theory that gauges Lμ-Lτ into the grand unified theory.

Academic Significance and Societal Importance of the Research Achievements

自然をより深く理解するために世界中で素粒子実験や宇宙の観測が行われており、その結果を基に素粒子標準理論の整合性やこれを超える理論の構築が行われている。この流れの中、この研究グループのメンバーもそれぞれの自然観に基づいて、理論の検証や新しい実験の提案、さらには新しい理論の構築を行ってきた。これらの行為は人類の知の地平線を広げる行為であり、地道ではあるものの、人類の総体としての知的欲求を満たす行為である。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (56 results)

All 2023 2022 2021 2020 2019 2018

All Journal Article (16 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 16 results,  Open Access: 14 results) Presentation (40 results) (of which Int'l Joint Research: 13 results,  Invited: 17 results)

  • [Journal Article] Determination of coupling patterns by parallel searches for μ??→?e+ and μ??→?e? in muonic atoms2023

    • Author(s)
      Sato Joe、Sugawara Kohei、Uesaka Yuichi、Yamanaka Masato
    • Journal Title

      Physics Letters B

      Volume: 836 Pages: 137617-137617

    • DOI

      10.1016/j.physletb.2022.137617

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Search for lepton flavor violating decay at FASER2023

    • Author(s)
      Araki Takeshi、Asai Kento、Otono Hidetoshi、Shimomura Takashi、Takubo Yosuke
    • Journal Title

      Journal of High Energy Physics

      Volume: 2023 Issue: 1

    • DOI

      10.1007/jhep01(2023)145

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Aiming for unification of Lμ ? Lτ and the standard model gauge group2022

    • Author(s)
      Sato Joe
    • Journal Title

      Journal of High Energy Physics

      Volume: 2022 Issue: 7

    • DOI

      10.1007/jhep07(2022)011

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Asymmetric Mediator in Scotogenic Model2022

    • Author(s)
      K. Asai, Y. Sakai, J. Sato, Y. Takanishi, M. Yamanaka
    • Journal Title

      Physics Letters B

      Volume: 836 Pages: 137627-137627

    • DOI

      10.1016/j.physletb.2022.137627

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transverse positron polarization in the polarized μ+ decay related with the muonium-to-antimuonium transition2022

    • Author(s)
      Fukuyama Takeshi、Mimura Yukihiro、Uesaka Yuichi
    • Journal Title

      Physical Review D

      Volume: 105 Issue: 7

    • DOI

      10.1103/physrevd.105.075024

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neutrinoless double beta decay and the muonium-to-antimuonium transition in models with a doubly charged scalar2022

    • Author(s)
      Takeshi Fukuyama, Yukihiro Mimura, Yuichi Uesaka
    • Journal Title

      Physical Review D

      Volume: 106 Issue: 5

    • DOI

      10.1103/physrevd.106.055041

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Revisiting sterile neutrino dark matter in gauged U(1)B-L model2022

    • Author(s)
      Eijima Shintaro、Seto Osamu、Shimomura Takashi
    • Journal Title

      Physical Review D

      Volume: 106 Issue: 10 Pages: 103513-103513

    • DOI

      10.1103/physrevd.106.103513

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Isotope dependence of muon decay in orbit2022

    • Author(s)
      Heeck Julian、Szafron Robert、Uesaka Yuichi
    • Journal Title

      Physical Review D

      Volume: 105 Issue: 5

    • DOI

      10.1103/physrevd.105.053006

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electron beam dump constraints on light bosons with lepton flavor violating couplings2021

    • Author(s)
      Araki Takeshi、Asai Kento、Shimomura Takashi
    • Journal Title

      Journal of High Energy Physics

      Volume: 2021 Issue: 11 Pages: 082-082

    • DOI

      10.1007/jhep11(2021)082

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Resolving the Hubble tension in a U(1)$_{L_\mu-L_\tau}$ model with the Majoron2021

    • Author(s)
      Araki Takeshi、Asai Kento、Honda Kei、Kasuya Ryuta、Sato Joe、Shimomura Takashi、Yang Masaki J S
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2021 Issue: 10 Pages: 103-103

    • DOI

      10.1093/ptep/ptab108

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Model identification in μ-→e-\mu^-\to e^-μ-→e- conversion with invisible boson emission using muonic atoms2020

    • Author(s)
      Uesaka Yuichi
    • Journal Title

      Physical Review D

      Volume: 102 Issue: 9 Pages: 1-9

    • DOI

      10.1103/physrevd.102.095007

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] COMET Phase-I Technical Design Report2020

    • Author(s)
      R. Abramishvili, M. Moritsu et al. [COMET Collaboration]
    • Journal Title

      Prog. Theor. Exp. Phys.

      Volume: 2020 Issue: 3 Pages: 1-102

    • DOI

      10.1093/ptep/ptz125

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Low scale seesaw models for low scale U(1)Lμ-Lτ symmetry2019

    • Author(s)
      Araki Takeshi、Asai Kento、Sato Joe、Shimomura Takashi
    • Journal Title

      Physical Review D

      Volume: 100 Issue: 9 Pages: 1-12

    • DOI

      10.1103/physrevd.100.095012

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Distinguishing muon LFV effective couplings using μ+e-→e-+e-2019

    • Author(s)
      J. Sato,* Y. Uesaka, Y. Kuno, T. Sato, M. Yamanaka
    • Journal Title

      PoS

      Volume: 341 Pages: 126-126

    • DOI

      10.22323/1.341.0126

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Momentum distribution of the electron pair from the charged lepton flavor violating process μe→ee in muonic atoms with a polarized muon2019

    • Author(s)
      Kuno Yoshitaka、Sato Joe、Sato Toru、Uesaka Yuichi、Yamanaka Masato
    • Journal Title

      Physical Review D

      Volume: 100 Issue: 7 Pages: 075012-075012

    • DOI

      10.1103/physrevd.100.075012

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Big-bang nucleosynthesis and leptogenesis in the CMSSM2018

    • Author(s)
      M. Kubo, J. Sato, T. Shimomura, Y. Takanishi, M. Yamanaka
    • Journal Title

      Physical Review D

      Volume: 97 Issue: 11 Pages: 115013-115013

    • DOI

      10.1103/physrevd.97.115013

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Determination of coupling patterns by parallel searches for μ^- → e^+ and μ^- → e^- in muonic atoms2023

    • Author(s)
      Joe Sato
    • Organizer
      Third International Workshop on the Extension Project for the J-PARC Hadron Experimental Facility (3rd J-PARC HEF-ex WS)
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Determination of coupling patterns by parallel searches for μ^- → e^+ and μ^- → e^- in muonic atoms2023

    • Author(s)
      Joe Sato
    • Organizer
      素粒子現象論研究会2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 8次元商空間を用いたCoset space dimensional reductionから得られる模型の分類2023

    • Author(s)
      須田亮介
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] U(1)Lμ - LτゲージボソンとMajoronによるHubble Tensionの解決2023

    • Author(s)
      浅野友哉
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Type-II seesaw models with modular A4 symmetry2023

    • Author(s)
      Takashi Shimomura
    • Organizer
      Recent development of modular flavor symmetry
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Aiming for Unification of Lμ-Lτ and the standard model gauge group2022

    • Author(s)
      Joe Sato
    • Organizer
      ICCSME2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Aiming for Unification of Lμ-Lτ and the standard model gauge group2022

    • Author(s)
      Joe
    • Organizer
      MMQS22
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] ミューオニウム-反ミューオニウム転換で探るレプトンフレーバー混合2022

    • Author(s)
      上坂優一
    • Organizer
      Kagoshima Workshop on Paritlces, Fields, and Strings 2023
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Scotogenic Model におけるダークマターとバリオンの起源の追求2022

    • Author(s)
      酒井裕平
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 「気がついたら益川さんの研究を追っていた。 KMとニュートリノ、BKMUとCoset Space Unification、それから・・・」2022

    • Author(s)
      佐藤丈
    • Organizer
      素粒子論のこの 50 年、そして未来 ― 益川さんを偲んで
    • Related Report
      2021 Annual Research Report
  • [Presentation] Electron beam dump実験によるcLFV探索2021

    • Author(s)
      荒木威
    • Organizer
      素粒子物理学の進展2021,京都大学基礎物理研究所
    • Related Report
      2021 Annual Research Report
  • [Presentation] Theoretical motivations for the muonium and anti-muonium transition2021

    • Author(s)
      Yuichi Uesaka
    • Organizer
      Second Internatinal Workshoponthe Extension Project for the J-PARC Hadron Experimental Facility
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Unification of L_μ - L_τ and the standard model gauge group2021

    • Author(s)
      佐藤丈
    • Organizer
      素粒子物理学の進展2021,京都大学基礎物理研究所
    • Related Report
      2021 Annual Research Report
  • [Presentation] Theory Overview :CLFV at muon scale2020

    • Author(s)
      Joe Sato
    • Organizer
      Snowmass21
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] IceCube Gap and Lmu-Ltau model2020

    • Author(s)
      Joe Sato
    • Organizer
      the International Conference of Computational Methods in Sciences and Enginearing
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Low scale seesaw models for low scale U(1)Lμ-Lτ symmetry2020

    • Author(s)
      佐藤丈
    • Organizer
      素粒子現象論研究会2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] ミューオン原子を用いた最小U(1)_{L_\mu-L_\tau}模型の検証可能性2020

    • Author(s)
      柿澤広明
    • Organizer
      日本物理学会 2020年 秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ミューオンDecay In Orbitの精密測定による、最小U(1)X拡張標準模型の探索可能性の検証2020

    • Author(s)
      柿澤広明
    • Organizer
      日本物理学会 2021年 春季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Neutralino dark matter のSommerfeld enhancement機構 による間接検出の可能性2020

    • Author(s)
      永山未來
    • Organizer
      日本物理学会 2021年 春季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 繰り込み可能なL_\mu-L_\tau模型によるHubble tensionの解決2020

    • Author(s)
      粕谷竜太
    • Organizer
      日本物理学会 2021年 春季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Low scale seesaw models for low scale U(1)Lμ-Lτ symmetry2020

    • Author(s)
      J.Sato
    • Organizer
      International Conference on Neutrinos and Dark Matter (NDM-2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] COMET Data Analysis with Deep Learning2020

    • Author(s)
      J.Sato
    • Organizer
      Machine Learning at LHC
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] IceCube Gap and L_mu-L_tau model2020

    • Author(s)
      J.Sato
    • Organizer
      Ryukyu Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 原子軌道上のミューオン崩壊における高次補正の効果2020

    • Author(s)
      平良優奈
    • Organizer
      日本物理学会 2020年 年次大会 素粒子論領域
    • Related Report
      2019 Annual Research Report
  • [Presentation] Big-bang nucleosynthesis and Leptogenesis in CMSSM2019

    • Author(s)
      J.Sato
    • Organizer
      15th Computational Chemistry (CC) Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Big-bang nucleosynthesis and Leptogenesis in CMSSM2019

    • Author(s)
      J.Sato
    • Organizer
      Dark Side of the Universe 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Theoretical overview of Lepton Flavor Violation2019

    • Author(s)
      J.Sato
    • Organizer
      The 3rd J-PARC Symposium (J-PARC2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] COMET Data Analysis with Deep Learning2019

    • Author(s)
      佐藤丈
    • Organizer
      「ニュートリノで拓く素粒子と宇宙」研究会2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 深層学習による COMET 実験データ解析2019

    • Author(s)
      佐藤丈
    • Organizer
      素粒子物理学の進展 2019
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 深層学習による COMET 実験データ解析の試み2019

    • Author(s)
      佐藤丈
    • Organizer
      素粒子現象論研究会2019
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 深層学習によるCOMET実験データ解析の試み2019

    • Author(s)
      佐藤丈
    • Organizer
      日本物理学会 2019年 年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] レプトンと弱結合するMeVスケールのゲージ粒子の物理とその検証可能性2018

    • Author(s)
      下村崇
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Light Z' boson search from scalar boson decays in Lμ - Lτ model at collider experiments2018

    • Author(s)
      下村崇
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Search for light scalar boson in Lμ - Lτ model at ILC experiments2018

    • Author(s)
      Takashi Shimomura
    • Organizer
      基研研究会 素粒子物理学の進展2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] Light Z' boson from scalar boson decay at collider experiments in U(1)Lμ-Lτ model2018

    • Author(s)
      Takashi Shimomura
    • Organizer
      Asian Linear Collider Workshop
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高エネルギー宇宙ニュートリノから探る新物理2018

    • Author(s)
      荒木威
    • Organizer
      久保治助教授退官記念研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Big-bang nucleosynthesis and Leptogenesis in CMSSM2018

    • Author(s)
      Joe Sato
    • Organizer
      26th International Conference on Supersymmetry and Unification of Fundamental Interactions
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Distinguishing muon LFV effective couplings using μ^e^-→e^-e^- in a muonic atom2018

    • Author(s)
      Joe Sato
    • Organizer
      The 20th International Workshop on Neutrinos from Accelerators
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Physics with Muon2018

    • Author(s)
      Joe Sato
    • Organizer
      Symposium for muon and neutrino physics 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] COMET実験における電子のエネルギーの深層学習による決定2018

    • Author(s)
      佐藤丈
    • Organizer
      第二回琉球大学計算科学シンポジウム:“量子論の物理・化学的アプローチで迫る物質・自然界の謎”
    • Related Report
      2018 Annual Research Report
    • Invited

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Published: 2018-04-23   Modified: 2024-01-30  

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