ニュートリノで探る対称性と宇宙像

• Project Area: Exploration of Particle Physics and Cosmology with Neutrinos
• Project/Area Number: 18H05542
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: The University of Tokyo
• Principal Investigator: 伊部 昌宏 東京大学, 宇宙線研究所, 准教授 (50599008)
• Co-Investigator(Kenkyū-buntansha): 渡利 泰山 東京大学, カブリ数物連携宇宙研究機構, 准教授 (40451819) ; 石渡 弘治 金沢大学, 数物科学系, 准教授 (40754271) ; 北野 龍一郎 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (50543451) ; 永田 夏海 東京大学, 大学院理学系研究科(理学部), 助教 (60794328)
• Project Period (FY): 2018-06-29 – 2023-03-31
• Project Status: Granted (Fiscal Year 2022)
• Budget Amount: ¥93,860,000 (Direct Cost: ¥72,200,000、Indirect Cost: ¥21,660,000); Fiscal Year 2022: ¥20,150,000 (Direct Cost: ¥15,500,000、Indirect Cost: ¥4,650,000); Fiscal Year 2021: ¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000); Fiscal Year 2020: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000); Fiscal Year 2019: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000); Fiscal Year 2018: ¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
• Keywords: 素粒子論 / 宇宙論 / 弦理論 / 統一模型 / ニュートリノ / 暗黒物質 / 物質反物質非対称性

Outline of Annual Research Achievements

本研究の目的は素粒子標準模型における未解決問題を解決する模型や大統一模型に対する新たなアイデアを提案し、ニュートリノ物理で探ることの出来る新物理の範囲を広げていくことにある。以下本年度の主な成果例を挙げる。 (1)レプトンの磁気双極子モーメントの精密計算をコンピュータ上で自動的に実行する方法論を提案し、実際に可能であることを示した。また、ハドロンの世界に関する新しい提案も行い、 素粒子理論の枠組みに関する重要かつ有用な成果が得られた。 (2) 大統一理論における二重項三重項質量分離問題を解決するため，R-対称性を持つ Flipped SU(5)大統一模型を構築し，将来の陽子崩壊実験における検証可能性を議論した。また，Flipped SU(5)大統一理論に基づくインフレーション模型に関してその予言を系統的に調べレビュー論文として報告した。 (3)カイラルで電荷を持つフェルミオンは宇宙ひも上に超伝導をもたらすことが知られている。最近その超伝導電流によってループ状の宇宙ひもが安定化し暗黒物質の候補(Vorton)となり得る可能性が提案された。しかしながら本研究によって宇宙ひもが有限な幅を持つことを考慮すると宇宙ひもに閉じ込められたカイラルフェルミオンが外部粒子に崩壊するため Vorton の寿命が宇宙論的にはならないことを示した。 (4) 超共形対称性を背後にもつハイブリッドインフレーションの臨界点以下のダイナミクスを一般化した形式のもとで詳細に調べ、従来とは違った予言を与えることを見つけた。 (5) モジュラー不変な超弦理論のコンパクト化の低エネルギー有効場の理論であっても、Witten のSU(2) アノマリーは必ずしも消えないことを示した。弦理論の解に課すべき整合性の条件がまだほかにあることを意味する。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

本年度も素粒子標準模型における未解決問題である暗黒物質の模型や、ニュートリを含む大統一模型の新たな提案など宇宙論と対称性を繋ぐ様々な研究を推進した。またモジュラー不変な超弦理論の低エネルギー有効場の理論がアノマリーを持ち得ることは、弦理論の解にまだ知られていない課すべき整合性の条件が存在することを意味しており、量子重力まで含めた究極理論の構築にとって重要な示唆を与える成果と言える。また、上述の成果以外にも Xenon 1T 実験で示唆された電子反跳信号の超過の問題をニュートリノと相互作用する新しいスカラー粒子で説明する提案を宇宙論的考察から否定できることを示すなど多くの成果を得た。

Strategy for Future Research Activity

引き続き新物理模型の提案およびそれらの発展的な研究を行う。またこれまでの新提案を発展させ、検証可これらの研究を通してニュートリノ物理 に対する新たなインプットを与えていく。以下いくつかの研究計画を挙げる。
1. Lmu-Ltau ゲージ対称性はミュー中間子の異常磁気能率の標準模型と実験値の乖離をゲージ理論で説明する有力な新物理候補となっている。 Lmu-Ltau ゲージ対称性の破れの初期宇宙での様相を調べ、レプジェネシスなど物質・反 物質非対称性の起源との整合性について研究を行う。
2.超弦理論の痕跡ともいえるモジュラー対称性に的を絞り、ニュートリノセクターが及ぼす加速膨張宇宙への影響を調べる。その 結果をニュートリノセクターへフィードバックさせ、宇宙バリオン数生成に重要なCP位相を定量的に評価する。
3. 大統一理論における二重項・三重項分離問題の解の一つに，ヒッグス場が南部・ゴールドストーン場であるというシナリオのおける陽子寿命の予言を定量的に与える。
4. 電子やμ粒子の磁気双極子能率の理論計算には量子電気力学の高次の摂動計算が必須である。これまでファインマン図の評価による方法で 高精度の予言が得られているが、その評価には職人的な技術を要し、より高次の評価には新たな計算方法が望まれる。今年度は、コンピュータを用いた摂動計算法を確立し、その有用性を探る。
5. 引き続き超弦理論の真空に対する理論的制約条件がモジュラー不変性+共形不変性のみなのかという問題を追及する。

Research Products

• [Int'l Joint Research] Minnesota University/Texas A&M University,(米国)
• [Int'l Joint Research] Madrid, IFT(スペイン)
• [Int'l Joint Research] Kings College of London(英国)
• [Int'l Joint Research] Tsung-Dao Lee Institute(中国)
• [Int'l Joint Research] Minnesota University/Texas A and M University(米国)
• [Int'l Joint Research] Kings College(英国)
• [Int'l Joint Research] University of Amsterdam(オランダ)
• [Int'l Joint Research] Tsung-Dao Lee Institute(中国)
• [Int'l Joint Research] Minnesota University/University of Wisonsin/Texas A&M University(米国)
• [Int'l Joint Research] Madrid Autonoma University(スペイン)
• [Int'l Joint Research] King's College. London(英国)
• [Int'l Joint Research] The Technical University of Munich(ドイツ)
• [Int'l Joint Research] Institute for Basic Science(韓国)
• [Int'l Joint Research]
• [Journal Article] Vector mesons on the wall (2021)
  • Author(s): Kitano Ryuichiro、Matsudo Ryutaro
  • Journal Title: Journal of High Energy Physics Volume: 2021 Issue: 3 Pages: 023-023
  • DOI: 10.1007/jhep03(2021)023
  • Peer Reviewed / Open Access
• [Journal Article] Stochastic computation of g ? 2 in QED (2021)
  • Author(s): Kitano Ryuichiro、Takaura Hiromasa、Hashimoto Shoji
  • Journal Title: Journal of High Energy Physics Volume: 2021 Issue: 5 Pages: 1-28
  • DOI: 10.1007/jhep05(2021)119
  • Peer Reviewed / Open Access
• [Journal Article] On stability of fermionic superconducting current in cosmic string (2021)
  • Author(s): Ibe Masahiro、Kobayashi Shin、Nakayama Yuhei、Shirai Satoshi
  • Journal Title: Journal of High Energy Physics Volume: 2021 Issue: 5 Pages: 1-24
  • DOI: 10.1007/jhep05(2021)217
  • Peer Reviewed / Open Access
• [Journal Article] Probing dark matter self-interaction with ultrafaint dwarf galaxies (2021)
  • Author(s): Hayashi Kohei、Ibe Masahiro、Kobayashi Shin、Nakayama Yuhei、Shirai Satoshi
  • Journal Title: Physical Review D Volume: 103 Issue: 2 Pages: 023017-023017
  • DOI: 10.1103/physrevd.103.023017
  • Peer Reviewed / Open Access
• [Journal Article] Proton decay in product group unification (2021)
  • Author(s): Evans Jason L.、Ibe Masahiro、Yanagida Tsutomu T.
  • Journal Title: Physical Review D Volume: 103 Issue: 3 Pages: 035009-035009
  • DOI: 10.1103/physrevd.103.035009
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] R-symmetric flipped SU(5) (2020)
  • Author(s): Hamaguchi Koichi、Hor Shihwen、Nagata Natsumi
  • Journal Title: Journal of High Energy Physics Volume: 2020 Issue: 11 Pages: 1-1
  • DOI: 10.1007/jhep11(2020)140
  • Peer Reviewed / Open Access
• [Journal Article] Building models of inflation in no-scale supergravity (2020)
  • Author(s): Ellis John、Garc?a Marcos A. G.、Nagata Natsumi、Nanopoulos Dimitri V.、Olive Keith A.、Verner Sarunas
  • Journal Title: International Journal of Modern Physics D Volume: 29 Issue: 16 Pages: 2030011-2030011
  • DOI: 10.1142/s0218271820300116
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Witten anomaly in 4d heterotic compactificaitons with $$ \mathcal{N} $$ = 2 supersymmetry (2020)
  • Author(s): Enoki Yuichi、Sato Yotaro、Watari Taizan
  • Journal Title: Journal of High Energy Physics Volume: 2020 Issue: 7 Pages: 1-14
  • DOI: 10.1007/jhep07(2020)180
  • Peer Reviewed / Open Access
• [Journal Article] Cosmic string in Abelian-Higgs model with enhanced symmetry ? Implication to the axion domain-wall problem (2020)
  • Author(s): Hiramatsu Takashi、Ibe Masahiro、Suzuki Motoo
  • Journal Title: Journal of High Energy Physics Volume: 2020 Issue: 9 Pages: 1-21
  • DOI: 10.1007/jhep09(2020)054
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess (2020)
  • Author(s): Ibe Masahiro、Kobayashi Shin、Nakayama Yuhei、Shirai Satoshi
  • Journal Title: Journal of High Energy Physics Volume: 2020 Issue: 12 Pages: 004-004
  • DOI: 10.1007/jhep12(2020)004
  • Peer Reviewed / Open Access
• [Journal Article] Detection capability of the Migdal effect for argon and xenon nuclei with position-sensitive gaseous detectors (2020)
  • Author(s): Nakamura Kiseki D、Miuchi Kentaro、Kazama Shingo、Shoji Yutaro、Ibe Masahiro、Nakano Wakutaka
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2021 Issue: 1 Pages: 1-14
  • DOI: 10.1093/ptep/ptaa162
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Probing heavy dark matter decays with multi-messenger astrophysical data (2020)
  • Author(s): Koji Ishiwata, Oscar Macias, Shin'ichiro Ando, Makoto Arimoto
  • Journal Title: JCAP Volume: 01 Issue: 01 Pages: 003-003
  • DOI: 10.1088/1475-7516/2020/01/003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Cosmological constraint on dark photon from Neff (2020)
  • Author(s): Ibe Masahiro、Kobayashi Shin、Nakayama Yuhei、Shirai Satoshi
  • Journal Title: Journal of High Energy Physics Volume: 2020 Issue: 4 Pages: 009-009
  • DOI: 10.1007/jhep04(2020)009
  • Peer Reviewed / Open Access
• [Journal Article] Superstring-inspired particle cosmology: inflation, neutrino masses, leptogenesis, dark matter & the SUSY scale (2020)
  • Author(s): Ellis John、Garcia Marcos A.G.、Nagata Natsumi、Nanopoulos Dimitri V.、Olive Keith A.
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2020 Issue: 01 Pages: 035-035
  • DOI: 10.1088/1475-7516/2020/01/035
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Throwing away antimatter via neutrino oscillations during the reheating era (2020)
  • Author(s): Eijima Shintaro、Kitano Ryuichiro、Yin Wen
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2020 Issue: 03 Pages: 048-048
  • DOI: 10.1088/1475-7516/2020/03/048
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] From 3D dualities to hadron physics (2020)
  • Author(s): Kan Naoto、Kitano Ryuichiro、Yankielowicz Shimon、Yokokura Ryo
  • Journal Title: Physical Review D Volume: 102 Issue: 12 Pages: 1-18
  • DOI: 10.1103/physrevd.102.125034
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] New type of string solutions with long range forces (2020)
  • Author(s): Hiramatsu Takashi、Ibe Masahiro、Suzuki Motoo
  • Journal Title: Journal of High Energy Physics Volume: 2020 Issue: 2 Pages: 1-21
  • DOI: 10.1007/jhep02(2020)058
  • Peer Reviewed / Open Access
• [Journal Article] Leptogenesis after superconformal subcritical hybrid inflation (2019)
  • Author(s): Yoshihiro Gunji, Koji Ishiwata
  • Journal Title: JHEP Volume: 09 Issue: 9 Pages: 065-065
  • DOI: 10.1007/jhep09(2019)065
  • Peer Reviewed / Open Access
• [Journal Article] Novel GUT with apparently complete SU(5) multiplets (2019)
  • Author(s): Ibe Masahiro、Shirai Satoshi、Suzuki Motoo、Yanagida Tsutomu T.
  • Journal Title: Physical Review D Volume: 100 Issue: 5 Pages: 055024-055024
  • DOI: 10.1103/physrevd.100.055024
  • Peer Reviewed / Open Access
• [Journal Article] Cosmology with a master coupling in flipped SU(5)×U(1): The λ6 universe (2019)
  • Author(s): Ellis John、Garcia Marcos A.G.、Nagata Natsumi、Nanopoulos Dimitri V.、Olive Keith A.
  • Journal Title: Physics Letters B Volume: 797 Pages: 134864-134864
  • DOI: 10.1016/j.physletb.2019.134864
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] String-Theory Realization of Modular Forms for Elliptic Curves with Complex Multiplication (2019)
  • Author(s): Kondo Satoshi、Watari Taizan
  • Journal Title: Communications in Mathematical Physics Volume: 367 Issue: 1 Pages: 89-126
  • DOI: 10.1007/s00220-019-03302-0
  • Peer Reviewed / Open Access
• [Journal Article] Long-lived particles at the energy frontier: the MATHUSLA physics case (2019)
  • Author(s): Curtin David, et.al.
  • Journal Title: Reports on Progress in Physics Volume: 82 Issue: 11 Pages: 116201-116201
  • DOI: 10.1088/1361-6633/ab28d6
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Minimal Gauged U(1)_{L_alpha - L_beta} Models Driven into a Corner (2019)
  • Author(s): Asai Kento, Hamaguchi Koichi, Nagata Natsumi, Tseng Shih-Yen, Tsumura Koji
  • Journal Title: Physical Review D Volume: 99 Issue: 5 Pages: 055029-055029
  • DOI: 10.1103/physrevd.99.055029
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Ultraviolet completion of a composite asymmetric dark matter model with a dark photon portal (2019)
  • Author(s): Ibe Masahiro、Kamada Ayuki、Kobayashi Shin、Kuwahara Takumi、Nakano Wakutaka
  • Journal Title: Journal of High Energy Physics Volume: 2019 Issue: 3 Pages: 1-20
  • DOI: 10.1007/jhep03(2019)173
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Limit on the axion decay constant from the cooling neutron star in Cassiopeia A (2018)
  • Author(s): Hamaguchi Koichi、Nagata Natsumi、Yanagi Keisuke、Zheng Jiaming
  • Journal Title: Physical Review D Volume: 98 Issue: 10 Pages: 103015-103015
  • DOI: 10.1103/physrevd.98.103015
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Leptogenesis via neutrino oscillation magic (2018)
  • Author(s): Hamada Yuta、Kitano Ryuichiro、Yin Wen
  • Journal Title: Journal of High Energy Physics Volume: 2018 Issue: 10 Pages: 178-178
  • DOI: 10.1007/jhep10(2018)178
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Unitarity constraint on the K?hler curvature (2018)
  • Author(s): Ema Yohei、Kitano Ryuichiro、Terada Takahiro
  • Journal Title: Journal of High Energy Physics Volume: 2018 Issue: 9 Pages: 075-075
  • DOI: 10.1007/jhep09(2018)075
  • Peer Reviewed / Open Access
• [Journal Article] Singlet Dirac fermion dark matter with mediators at loop (2018)
  • Author(s): Hisano Junji、Nagai Ryo、Nagata Natsumi
  • Journal Title: Journal of High Energy Physics Volume: 1812 Issue: 12 Pages: 059-059
  • DOI: 10.1007/jhep12(2018)059
  • Peer Reviewed / Open Access
• [Journal Article] Non-universal gaugino masses in the NMSSM (2018)
  • Author(s): Kawamura Junichiro、Kobayashi Tatsuo、Nagata Natsumi
  • Journal Title: Journal of High Energy Physics Volume: 1810 Issue: 10 Pages: 120-120
  • DOI: 10.1007/jhep10(2018)120
  • Peer Reviewed / Open Access
• [Journal Article] The swampland conjecture and the Higgs expectation value (2018)
  • Author(s): Hamaguchi Koichi、Ibe Masahiro、Moroi Takeo
  • Journal Title: Journal of High Energy Physics Volume: 2018 Issue: 12 Pages: 023-023
  • DOI: 10.1007/jhep12(2018)023
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Probing pseudo Nambu-Goldstone boson dark matter at loop level (2018)
  • Author(s): Ishiwata Koji、Toma Takashi
  • Journal Title: Journal of High Energy Physics Volume: 2018 Issue: 12 Pages: 1-1
  • DOI: 10.1007/jhep12(2018)089
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] バイオンを巡るリサージェンス予想への反証と新たな理解 (2021)
  • Author(s): 高浦大雅
  • Organizer: 日本物理学会第76回年次大会(2021年)
• [Presentation] 中性子星の温度観測を用いた暗黒物質探索 (2020)
  • Author(s): 永田夏海
  • Organizer: 日本物理学会2020年秋季大会
  • Invited
• [Presentation] SK/HKでのBSM理論レビュー (2020)
  • Author(s): 永田夏海
  • Organizer: CRC将来計画タウンミーティング
  • Invited
• [Presentation] Modular Forms as Classification Invariants of 4D N=2 Heterotic-IIA Dual Vacua (2020)
  • Author(s): 榎優一
  • Organizer: Strings and Fields 2020
  • Int'l Joint Research
• [Presentation] Witten anomaly in Heterotic compactifications (2020)
  • Author(s): 佐藤陽太郎
  • Organizer: Strings and Fields 2020
  • Int'l Joint Research
• [Presentation] Modern perturbation theory for more accurate predictions (2020)
  • Author(s): 高浦大雅
  • Organizer: 「ニュートリノで拓く素粒子と宇宙」研究会2020
• [Presentation] Sterile neutrino dark matter and freeze-in generation of lepton asymmetries (2020)
  • Author(s): 永島伸多郎
  • Organizer: 「ニュートリノで拓く素粒子と宇宙」研究会2020
• [Presentation] Oscillating Composite Asymmetric Dark Matter (2020)
  • Author(s): 小林伸
  • Organizer: KASHIWA DARK MATTER SYMPOSIUM 2020
  • Int'l Joint Research
• [Presentation] Cosmological Constraint on Dark Photon from Neff (2020)
  • Author(s): 中山悠平
  • Organizer: KASHIWA DARK MATTER SYMPOSIUM 2020
  • Int'l Joint Research
• [Presentation] New Type of String Solutions with Long Range Forces (2020)
  • Author(s): Masahiro Ibe
  • Organizer: Berkeley Week at Kavli IPMU
  • Int'l Joint Research / Invited
• [Presentation] Some Pheno-inspired Remaining Problems in F-theory Compactifications (2020)
  • Author(s): 渡利泰山
  • Organizer: KEK workshop
  • Int'l Joint Research / Invited
• [Presentation] Leptogenesis after superconformal subcritical hybrid inflation (2019)
  • Author(s): Koji Ishiwata
  • Organizer: Planck 2019
  • Int'l Joint Research
• [Presentation] Brief review of direct detection of dark matter (2019)
  • Author(s): Koji Ishiwata
  • Organizer: CRCタウンミーティング
  • Int'l Joint Research / Invited
• [Presentation] Axion Cooling in Neutron Stars (2019)
  • Author(s): 永田夏海
  • Organizer: BS-ICTP Workshop on Axion-Like Particles
  • Int'l Joint Research / Invited
• [Presentation] Dark Matter Heating vs. Rotochemical Heating in Old Neutron Stars (2019)
  • Author(s): 永田夏海
  • Organizer: 15th Rencontres du Vietnam
  • Int'l Joint Research / Invited
• [Presentation] Migdal Effect in Dark Matter Direct Detection Experiments and Its Applications (2019)
  • Author(s): Masahiro Ibe
  • Organizer: 43rd Johns Hopkins Workshop
  • Int'l Joint Research / Invited
• [Presentation] From 3d dualities to hadron physics (2019)
  • Author(s): 北野龍一郎
  • Organizer: International Joint Workshop on the Standard Model and beyond
  • Int'l Joint Research / Invited
• [Presentation] Leptogenesis via Neutrino Oscillation Magic (2019)
  • Author(s): 北野龍一郎
  • Organizer: International workshop on “Inten- sity Frontier in Particle Physics: Flavor, CP Violation and Dark Physics
  • Int'l Joint Research / Invited
• [Presentation] String-theory Perspective on Arithmetic Modular Forms (2019)
  • Author(s): 渡利泰山
  • Organizer: String and Fields 2019
  • Int'l Joint Research
• [Presentation] Dark Matter Theory (2019)
  • Author(s): Natsumi Nagata
  • Organizer: Revealing the history of the universe with underground particle and nuclear research 2019
  • Int'l Joint Research / Invited
• [Presentation] Brief review of dark matter and the detection (2019)
  • Author(s): Koji Ishiwata
  • Organizer: Toyama International Symposium on Physics at the Cosmic Frontier
  • Int'l Joint Research
• [Presentation] Asymmetric Dark Matter (2019)
  • Author(s): Masahiro Ibe
  • Organizer: Revealing the history of the universe with underground particle and nuclear research 2019
  • Int'l Joint Research / Invited
• [Presentation] Dark Matter Models and Neutrino Signals (2019)
  • Author(s): Masahiro Ibe
  • Organizer: VHEPA2019
  • Int'l Joint Research / Invited
• [Presentation] Non-Universal Gaugino Masses in the NMSSM (2019)
  • Author(s): Natsumi Nagata
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] Theoretical Developments in Dark Matter-Nucleon Scattering (2018)
  • Author(s): Natsumi Nagata
  • Organizer: Dark Side of the Universe 2018
  • Int'l Joint Research
• [Presentation] Long-Lived Particle Searches as a Probe of Dark Sectors: Theoretical Overview (2018)
  • Author(s): Natsumi Nagata
  • Organizer: LLP workshop 2018
  • Int'l Joint Research
• [Presentation] Limit on the Axion Decay Constant from the Cooling Neutron Star in Cassiopeia A. (2018)
  • Author(s): Natsumi Nagata
  • Organizer: KEK-PH
  • Int'l Joint Research / Invited
• [Presentation] Superconformal Subcritical Hybrid Inflation. (2018)
  • Author(s): Koji Ishiwata
  • Organizer: SUSY2018
  • Int'l Joint Research
• [Presentation] A Gauged U(1) PQ symmetry (2018)
  • Author(s): Masahiro Ibe
  • Organizer: Invisible 18
  • Int'l Joint Research / Invited
• [Presentation] インフレーションによるプランクスケール物理探索の可能性. (2018)
  • Author(s): Koji Ishiwata
  • Organizer: 質量階層性に対する新しい原理が導く多彩な物理現象とプランクスケールの物理
• [Presentation] 銀河外ガンマ線による宇宙暗黒物質探索. (2018)
  • Author(s): Koji Ishiwata
  • Organizer: 素粒子物理学の進展２０１８
• [Presentation] WIMP暗黒物質の現状 (2018)
  • Author(s): Natsumi Nagata
  • Organizer: 新テラスケール研究会
  • Invited
• [Presentation] Cassiopeia A 中性子星の冷却曲線とアクシオン (2018)
  • Author(s): Natsumi Nagata
  • Organizer: 素粒子物理学の進展2018
• [Presentation] フレーバー構造と陽子崩壊 (2018)
  • Author(s): Natsumi Nagata
  • Organizer: 新学術領域「ニュートリノで拓く素粒子と宇宙」研究会
  • Invited