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宇宙の揺らぎと構造の進化、その背後にある物理の究明

Planned

Project AreaWhy does the Universe accelerate? - Exhaustive study and challenge for the future -
Project/Area Number 15H05889
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionTohoku University

Principal Investigator

高橋 史宜  東北大学, 理学研究科, 教授 (60503878)

Co-Investigator(Kenkyū-buntansha) 樽家 篤史  京都大学, 基礎物理学研究所, 准教授 (40334239)
川崎 雅裕  東京大学, 宇宙線研究所, 教授 (50202031)
郡 和範  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, 准教授 (50565819)
Project Period (FY) 2015-06-29 – 2020-03-31
Project Status Granted (Fiscal Year 2019)
Budget Amount *help
¥40,170,000 (Direct Cost: ¥30,900,000、Indirect Cost: ¥9,270,000)
Fiscal Year 2019: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2018: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2017: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2016: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2015: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords暗黒物質 / インフレーション / 暗黒エネルギー / ダークマター / ダークエネルギー / 宇宙物理 / 密度揺らぎの進化 / 素粒子論 / 構造形成 / 超対称性理論 / 元素合成 / 宇宙背景輻射
Outline of Annual Research Achievements

高橋はインフラトンとダークマターをアクシオンで統一的に説明する模型を構築し,そのパラメター空間を詳細に調べることで将来の太陽アクシオン実験およびCMB観測で検証可能であることを示した,川崎は宇宙初期に原始ブラックホールを生成するインフレーション模型を構築し、この模型がLIGOで発見された重力波イベントと宇宙の暗黒物質の両方を説明することができることを示した。樽家は構造形成の非線形段階に現れるシェルクロッシングと呼ばれるコールドダークマター特有の現象をラグランジェ摂動論を用いて記述することに成功した。また、N体シミュレーションを用いてシェルクロッシング後に現れるコールドダークマターの位相空間構造を定量化することで、ハロー外縁部の構造が自己相似解でよく記述できることを見出した。郡は,IceCube実験が報告した100TeVから数PeVのエネルギーを持つ高エネルギーニュートリノが持つ複雑なスペクトルの特徴を崩壊するダークマターによってフィットするモデルを提案した。千葉は暗黒物質の正体に知見を得るために、銀河系周囲の暗黒物質構造を反映している矮小衛星銀河の探査を行い、幾つかの新しい銀河を発見した。また、その発見率が冷たい暗黒物質の予言と矛盾しないことが分かった。伊部は strong CP problem の解であると期待される Peccei-Quinn 機構に対する再考察行った。特に Peccei-Quinn 機構に重要な大域的対称性をゲージ対称性から導く簡潔な一般的処方箋を考案した。横崎はQCDアクシオンは強いCP問題の解の帰結として現れる新粒子である。高橋・横崎は大学院生の大道とともに、QCDアクシオンが隠れたゲージボソンと結合するとき、アクシオンと光子との結合が通常に比べて100倍程度大きくなり、将来実験で容易に観測出来ることを示した。

Current Status of Research Progress
Current Status of Research Progress

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

Reason

ダークマターとインフレーションを統一的に記述し,かつ将来CMBやレーザー実験において検証可能なアクシオン模型を構築するなど,他計画研究班および公募研究との連携に繋がる研究成果をあげることができた.また特筆すべき成果として,矮小衛星銀河探索したところ新しい銀河を発見し,冷たいダークマターと無矛盾な結果を得ることができた.また構造形成の非線形段階に現れるシェルクロッシングと呼ばれるコールドダークマター特有の現象をラグランジェ摂動論を用いて記述することに成功した他,原始ブラックホールがダークマターとなるシナリオに関してその生成機構を詳細に調べたり,アクシオンダークマターの基礎となるPeccei-Quinn対称性に対する新しい理解を得るなど着実に成果を上げている.

Strategy for Future Research Activity

川崎はバリオン等曲率揺らぎに関して、その生成メカニズムとそれが原始ブラックホールを生成する可能性や宇宙初期の軽元素合成に与える影響を調べる。樽家はコールドダークマター優勢宇宙における構造形成の精密理論構築に向け、新しい計算手法の開発を引き続き進める。特に、3次元重力系で起こるシェルクロッシング後の現象を解析的に記述する手法を模索するとともに、N体シミュレーションをもとにダークマターハローの位相空間構造を明らかにし、より精密なコールドダークマターの検証方法を探求する。郡はガンマ線の次世代実験であるCTA計画では、我々の銀河に付随するdwarf galaxyの内部で起こると期待されるダークマターの対消滅もしくは崩壊に起因するガンマ線の空間分布を検出することが期待されている。その観測と比べられる理論テンプレートの製作の準備を行う。伊部はゲージ対称性に基づく Peccei-Quinn 機構に関する発展として axion 暗黒物質や domain wall 問題、その他宇宙論との整合性を考察していくことを計画している。千葉は引き続き矮小銀河の探査を行って、その発見率の統計を高めるとともに、個々の矮小銀河の暗黒物質分布を求めるための観測とその解析を進める。横崎は超対称性を破る場のシフトに対して不変な理論は、超対称性理論に伴うCP問題を解決することが出来る。この理論において、超対称性を破る場は自然にQCDアクシオンを含む。この理論に基づき、アクシオンや超対称性粒子に対する宇宙論的・実験的制限を明らかにする。高橋は研究の総括をするとともに,ダークマターの様々な模型構築および制限を導くほか,加速宇宙の謎の解明に向けて他計画研究班との研究協力に尽力する,

Report

(3 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report

Research Products

(116 results)

All 2018 2017 2016 2015 Other

All Int'l Joint Research Journal Article Presentation Book Remarks Funded Workshop

  • [Int'l Joint Research] プリンストン大学/カリフォルニア工科大学/ジョンズ・ホプキンス大学(アメリカ)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] 上海天文台/IHEP(中国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] 中央研究所天文及天文物理研究所(台湾)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] KASI(韓国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] IAP/Paris Observatory(フランス)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] IBS/Pusan University/APCTP(大韓民国)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] Pusan University(韓国)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] The ALP miracle revisited2018

    • Author(s)
      Daido Ryuji、Takahashi Fuminobu、Yin Wen
    • Journal Title

      Journal of High Energy Physics

      Volume: 02 Pages: 104-104

    • DOI
      10.1007/jhep02(2018)104
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Adiabatic suppression of the axion abundance and isocurvature due to coupling to hidden monopoles,2018

    • Author(s)
      Masahiro KawasakiFuminobu TakahashiMasaki Yamada
    • Journal Title

      JHEP

      Volume: 01 Pages: 53-53

    • DOI
      10.1007/jhep01(2018)053
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Metallicity Distribution of Disk Stars and the Formation History of the Milky Way2018

    • Author(s)
      Toyouchi Daisuke、Chiba Masashi
    • Journal Title

      Astrophysical Journal

      Volume: 855 Pages: 104-104

    • DOI
      10.3847/1538-4357/aab044
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Searches for new Milky Way satellites from the first two years of data of the Subaru/Hyper Suprime-Cam survey: Discovery of Cetus III2018

    • Author(s)
      D.Homma, M.Chiba, S. Okamoto, Y.Komiyama,M.Tanaka, M.Ishigaki, K.Hayashi, N.Arimoto et al.
    • Journal Title

      PASJ

      Volume: 70 Pages: 1-12

    • DOI
      10.1093/pasj/psx050
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stellar Stream and Halo Structure in the Andromeda Galaxy from a Subaru/Hyper Suprime-Cam Survey2018

    • Author(s)
      Komiyama, Yutaka; Chiba, Masashi; Tanaka, Mikito; Tanaka, Masayuki; Kirihara, Takanobu; Miki, Yohei; Mori, Masao; Lupton, Robert H.; Guhathakurta, Puragra; Kalirai, Jason S.; Gilbert, Karoline; Kirby, Evan; Lee, Myun Gyoon; Jang, In Sung; Sharma, Sanjib; Hayashi, Kohei
    • Journal Title

      Astrophysical Journal

      Volume: 853 Pages: 29-29

    • DOI
      10.3847/1538-4357/aaa129
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Migdal Effect in Dark Matter Direct Detection Experiments2018

    • Author(s)
      Masahiro Ibe, Wakutaka Nakano, Yutaro Shoji, Kazumine Suzuki
    • Journal Title

      Journal of High Energy Physics

      Volume: 03 Pages: 194-194

    • DOI
      10.1007/jhep03(2018)194
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enhanced axion-photon coupling in GUT with hidden photon2018

    • Author(s)
      Daido Ryuji、Takahashi Fuminobu、Yokozaki Norimi
    • Journal Title

      Physics Letters

      Volume: 780 Pages: 538-542

    • DOI
      10.1016/j.physletb.2018.03.039
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Constraints on small-scale primordial power by annihilation signals from extragalactic dark matter minihalos2018

    • Author(s)
      Tomohiro Nakama, Teruaki Suyama, Kazunori Kohri, and Nagisa Hiroshima
    • Journal Title

      Physical Review D

      Volume: 97 Pages: 023539-023539

    • DOI
      10.1103/physrevd.97.023539
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Revisiting Big-Bang Nucleosynthesis Constraints on Long-Lived Decaying Particles2018

    • Author(s)
      Kawasaki Masahiro、Kohri Kazunori、Moroi Takeo、Takaesu Yoshitaro
    • Journal Title

      Phys. Rev.

      Volume: 97 Pages: 023502-023502

    • DOI
      10.1103/physrevd.97.023502
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High-energy Neutrinos from Multi-body Decaying Dark Matter2018

    • Author(s)
      Hiroshima Nagisa、Kitano Ryuichiro、Kohri Kazunori、Murase Kohta
    • Journal Title

      Physical Review D

      Volume: 97 Pages: 023006-023006

    • DOI
      10.1103/physrevd.97.023006
    • NAID
      120006457176
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] O(10) solarmass primordial black holes and string axion dark matter2018

    • Author(s)
      Inomata Keisuke、Kawasaki Masahiro、Mukaida Kyohei、Tada Yuichiro、Yanagida Tsutomu T.
    • Journal Title

      Phys. Rev. D

      Volume: 96 Pages: 123527-123527

    • DOI
      10.1103/physrevd.96.123527
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Double inflation as a single origin of primordial black holes for all dark matter and LIGO observations2018

    • Author(s)
      Inomata Keisuke、Kawasaki Masahiro、Mukaida Kyohei、Yanagida Tsutomu T.
    • Journal Title

      Phys. Rev. D

      Volume: 97 Pages: 043514-043514

    • DOI
      10.1103/physrevd.97.043514
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Gravitational waves from domain walls and their implications2017

    • Author(s)
      Nakayama Kazunori、Takahashi Fuminobu、Yokozaki Norimi
    • Journal Title

      Physics Letters

      Volume: 770 Pages: 500-506

    • DOI
      10.1016/j.physletb.2017.05.010
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The sign of the dipole-dipole potential by axion exchange2017

    • Author(s)
      Daido Ryuji、Takahashi Fuminobu
    • Journal Title

      Physics Letters B

      Volume: 772 Pages: 127-129

    • DOI
      10.1016/j.physletb.2017.06.027
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Gauge coupling unification with hidden photon, and minicharged dark matter2017

    • Author(s)
      R. Daido, F. Takahashi and N. Yokozak
    • Journal Title

      Physics Letters B

      Volume: 768 Pages: 30-30

    • DOI
      10.1016/j.physletb.2017.01.085
    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] The ALP miracle: unified inflaton and dark matter2017

    • Author(s)
      Daido Ryuji、Takahashi Fuminobu、Yin Wen
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 05 Pages: 044-044

    • DOI
      10.1088/1475-7516/2017/05/044
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Precision cosmology with redshift-space bispectrum: A perturbation theory based model at one-loop order2017

    • Author(s)
      Ichihiko Hashimoto, Yann Rasera, and Atsushi Taruya
    • Journal Title

      Physical Review D

      Volume: 96 Pages: 043526-043526

    • DOI
      10.1103/physrevd.96.043526
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Moving around the cosmological parameter space: A nonlinear power spectrum reconstruction based on high-resolution cosmic responses2017

    • Author(s)
      Nishimichi Takahiro、Bernardeau Francis、Taruya Atsushi
    • Journal Title

      Physical Review D

      Volume: 96 Pages: 123515-123515

    • DOI
      10.1103/physrevd.96.123515
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Post-collapse perturbation theory in 1D cosmology ? beyond shell-crossing2017

    • Author(s)
      Taruya Atsushi、Colombi Stphane
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 470 Pages: 4858-4884

    • DOI
      10.1093/mnras/stx1501
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Universal Dark Halo Scaling Relation for the Dwarf Spheroidal Satellites2017

    • Author(s)
      Hayashi Kohei、Ishiyama Tomoaki、Ogiya Go、Chiba Masashi、Inoue Shigeki、Mori Masao
    • Journal Title

      Astrophysical Journal

      Volume: 843 Pages: 97-106

    • DOI
      10.3847/1538-4357/aa74d9
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Resolved Stellar Streams around NGC 4631 from a Subaru/Hyper Suprime-Cam Survey2017

    • Author(s)
      Tanaka Mikito、Chiba Masashi、Komiyama Yutaka
    • Journal Title

      The Astrophysical Journal

      Volume: 842 Pages: 127-127

    • DOI
      10.3847/1538-4357/aa6d11
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dynamical clockwork axions2017

    • Author(s)
      Rupert Coy,Michele Frigerio and Masahiro Ibe
    • Journal Title

      Journal of High Energy Physics

      Volume: 10 Pages: 002-002

    • DOI
      10.1007/jhep10(2017)002
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A “gauged” U (1) Peccei-Quinn symmetry2017

    • Author(s)
      Fukuda Hajime、Ibe Masahiro、Suzuki Motoo、Yanagida Tsutomu T.
    • Journal Title

      Physics Letters

      Volume: 771 Pages: 327-331

    • DOI
      10.1016/j.physletb.2017.05.071
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dark matter candidates in a visible heavy QCD axion model2017

    • Author(s)
      Hajime Fukuda, Masahiro Ibe, and Tsutomu T. Yanagida
    • Journal Title

      Physical Review D

      Volume: 95 Pages: 095017-095017

    • DOI
      10.1103/physrevd.95.095017
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] CMB bounds on disk-accreting massive Primordial Black Holes2017

    • Author(s)
      Vivian Poulin, Pasquale D. Serpico, Francesca Calore, Sebastien Clesse, and Kazunori Kohri
    • Journal Title

      Physical Review D

      Volume: 96 Pages: 083524-083524

    • DOI
      10.1103/physrevd.96.083524
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Spins of primordial black holes formed in the matter-dominated phase of the Universe2017

    • Author(s)
      Tomohiro Harada, Chul-Moon Yoo, Kazunori Kohri, Ken-ichi Nakao
    • Journal Title

      Physical Review D

      Volume: 96 Pages: 083517-083517

    • DOI
      10.1103/physrevd.96.083517
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Can decaying particle explain cosmic infrared background excess?2017

    • Author(s)
      Kohri Kazunori、Moroi Takeo、Nakayama Kazunori
    • Journal Title

      Phys.Lett.B

      Volume: 772 Pages: 628-633

    • DOI
      10.1016/j.physletb.2017.07.026
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multi-field effects in a simple extension of R2 inflation2017

    • Author(s)
      Mori Taro、Kohri Kazunori、White Jonathan
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2017 Pages: 044-044

    • DOI
      10.1088/1475-7516/2017/10/044
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Axion-Like Particles and Recent Observations of the Cosmic Infrared Background Radiation2017

    • Author(s)
      Kazunori Kohri and Hideo Kodama
    • Journal Title

      Physical Review D

      Volume: 96 Pages: 051701-051701

    • DOI
      10.1103/physrevd.96.051701
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Constraints on long-lived electrically charged massive particles from anomalous strong lens systems2017

    • Author(s)
      Kamada Ayuki、Inoue Kaiki Taro、Kohri Kazunori、Takahashi Tomo
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2017 Pages: 008-008

    • DOI
      10.1088/1475-7516/2017/11/008
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cosmological constant problem and renormalized vacuum energy density in curved background2017

    • Author(s)
      Kohri Kazunori、Matsui Hiroki
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2017 Pages: 006-006

    • DOI
      10.1088/1475-7516/2017/06/006
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inflationary primordial black holes for the LIGO gravitational wave events and pulsar timing array experiments.2017

    • Author(s)
      Inomata Keisuke、Kawasaki Masahiro、Mukaida Kyohei、Tada Yuichiro、Yanagida Tsutomu T.
    • Journal Title

      PHYSICAL REVIEW D

      Volume: 95 Pages: 123510-123510

    • DOI
      10.1103/physrevd.95.123510
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Relaxation leptogenesis, isocurvature perturbations, and the cosmic infrared background2017

    • Author(s)
      Kawasaki Masahiro、Kusenko Alexander、Pearce Lauren、Yang Louis
    • Journal Title

      Physical Review D

      Volume: 95 Pages: 103006-103006

    • DOI
      10.1103/physrevd.95.103006
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Inflationary Primordial Black Holes as All Dark Matter2017

    • Author(s)
      Inomata Keisuke、Kawasaki Masahiro、Mukaida Kyohei、Tada Yuichiro、Yanagida Tsutomu T.
    • Journal Title

      Phys. Rev. D

      Volume: 96 Pages: 043504-043504

    • DOI
      10.1103/physrevd.96.043504
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] New type of charged Q -ball dark matter in gauge mediated SUSY breaking models2017

    • Author(s)
      Hong Jeong-Pyong、Kawasaki Masahiro
    • Journal Title

      Physical Review D

      Volume: 95 Pages: 123532-123532

    • DOI
      10.1103/physrevd.95.123532
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gauged Q-ball decay rates into fermions2017

    • Author(s)
      Hong Jeong-Pyong、Kawasaki Masahiro
    • Journal Title

      Physical Review D

      Volume: 96 Pages: 103526-103526

    • DOI
      10.1103/physrevd.96.103526
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Oscillating Affleck-Dine condensate and its cosmological implications2017

    • Author(s)
      Hasegawa Fuminori、Kawasaki Masahiro
    • Journal Title

      Physical Review D

      Volume: 96 Pages: 063518-063518

    • DOI
      10.1103/physrevd.96.063518
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Consistency relations for large-scale structures with primordial non-Gaussianities2017

    • Author(s)
      P.~Valageas, A.~Taruya and T.~Nishimichi,
    • Journal Title

      Physical Review D

      Volume: 95 Pages: 023504-023504

    • DOI
      10.1103/physrevd.95.023504
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Effects of electrically charged dark matter on cosmic microwave background anisotropies2017

    • Author(s)
      A.~Kamada, K.~Kohri, T.~Takahashi and N.~Yoshida
    • Journal Title

      Physical Review D

      Volume: 95 Pages: 023502-023502

    • DOI
      10.1103/physrevd.95.023502
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Elucidating Dark Energy with Future 21 cm Observations at the Epoch of Reionization2017

    • Author(s)
      K.~Kohri, Y.~Oyama, T.~Sekiguchi and T.~Takahashi,
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 02 Pages: 024-024

    • DOI
      10.1088/1475-7516/2017/02/024
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Constructing perturbation theory kernels for large-scale structure in generalized cosmologies2016

    • Author(s)
      A.~Taruya
    • Journal Title

      Physical Review D

      Volume: 94 Pages: 023504-023504

    • DOI
      10.1103/physrevd.94.023504
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Detecting Black-Hole Binary Clustering via the Second-Generation Gravitational-Wave Detectors2016

    • Author(s)
      T.~Namikawa, A.~Nishizawa and A.~Taruya,
    • Journal Title

      Phys. Rev. D

      Volume: 94 Pages: 024013-024013

    • DOI
      10.1103/physrevd.94.024013
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] A New Milky Way Satellite Discovered In The Subaru/Hyper Suprime-Cam Survey2016

    • Author(s)
      Homma, D., China, M., Okamoto, S. et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 832 Pages: 21-21

    • DOI
      10.3847/0004-637x/832/1/21
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Evidence for a Dusty Dark Dwarf Galaxy in the Quadruple Lens MG 0414+05342016

    • Author(s)
      Inoue, K, T., Matsushita, S., Minezaki, T., Chiba, M.
    • Journal Title

      Astrophysical Journal

      Volume: 835 Pages: 23-28

    • DOI
      10.3847/2041-8213/835/2/l23
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Charged Q-ball Dark Matter from B and L direction2016

    • Author(s)
      J.~P.~Hong, M.~Kawasaki and M.~Yamada,
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 08 Pages: 053-053

    • DOI
      10.1088/1475-7516/2016/08/053
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Revisiting constraints on small scale perturbations from big-bang nucleosynthesis2016

    • Author(s)
      K.~Inomata, M.~Kawasaki and Y.~Tada,
    • Journal Title

      Physical Review D

      Volume: 94 Pages: 043527-043527

    • DOI
      10.1103/physrevd.94.043527
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Primordial black holes as dark matter in supergravity inflation models.2016

    • Author(s)
      M.~Kawasaki, A.~Kusenko, Y.~Tada and T.~T.~Yanagida,
    • Journal Title

      Physical Review

      Volume: 94 Pages: 083523-083523

    • DOI
      10.1103/physrevd.94.083523
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Primordial black hole formation in the matter-dominated phase of the Universe2016

    • Author(s)
      T.~Harada, C.~M.~Yoo, K.~Kohri, K.~i.~Nakao and S.~Jhingan
    • Journal Title

      Astrophys. J.

      Volume: 833 Pages: 1-61

    • DOI
      10.3847/1538-4357/833/1/61
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Topological Defects and nano-Hz Gravitational Waves in Aligned Axion Models,2016

    • Author(s)
      Higaki, Tetsutaro and Jeong, Kwang Sik and Kitajima, Naoya and Sekiguchi, Toyokazu and Takahashi, Fuminobu
    • Journal Title

      Journal of High Energy Physics

      Volume: 08 Pages: 044-044

    • DOI
      10.1007/jhep08(2016)044
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Viable Chaotic Inflation as a Source of Neutrino Masses and Leptogenesis2016

    • Author(s)
      K.Nakayama, F.Takahashi, T.T.Yanagida
    • Journal Title

      Physics Letters

      Volume: 757 Pages: 32-28

    • DOI
      10.1016/j.physletb.2016.03.051
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Diphoton excess from hidden U(1) gauge symmetry with large kinetic mixing2016

    • Author(s)
      F.~Takahashi, M.~Yamada and N.~Yokozaki
    • Journal Title

      Physics Letter B

      Volume: 760 Pages: 013-013

    • DOI
      10.1016/j.physletb.2016.07.013
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Spontaneous Baryogenesis from Asymmetric Inflaton2016

    • Author(s)
      F. Takahashi and M. Yamada
    • Journal Title

      Physics Letters

      Volume: 756 Pages: 216-216

    • DOI
      10.1016/j.physletb.2016.03.020
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Suppressing the QCD Axion Abundance by Hidden Monopoles2016

    • Author(s)
      M. Kawasaki, F. Takahashi and M. Yamada
    • Journal Title

      Physics letter B

      Volume: 753 Pages: 677-677

    • DOI
      10.1016/j.physletb.2015.12.075
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] The QCD Axion from Aligned Axions and Diphoton Excess2016

    • Author(s)
      T. Higaki, K. S. Jeong, N. Kitajima and F. Takahashi,
    • Journal Title

      Physics Letters

      Volume: 755 Pages: 13-13

    • DOI
      10.1016/j.physletb.2016.01.055
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Revisiting Big-Bang Nucleosynthesis Constraints on Dark-Matter Annihilation2016

    • Author(s)
      M. Kawasaki, K. Kohri, T. Moroi and Y. Takaesu
    • Journal Title

      Phys. Lett. B

      Volume: 751 Pages: 246-246

    • DOI
      10.1016/j.physletb.2015.10.048
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] CMB constraint on dark matter annihilation after Planck 20152016

    • Author(s)
      M.Kawasaki, K.Nakayama, T.Sekiguchi
    • Journal Title

      Physics Letter B

      Volume: 756 Pages: 212-212

    • DOI
      10.1016/j.physletb.2016.03.005
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Constraints on the neutrino parameters by future cosmological 21 cm line and precise CMB polarization observations2016

    • Author(s)
      Y. Oyama, K. Kohri, M. Hazumi
    • Journal Title

      JCAP

      Volume: 1602 Pages: 008-008

    • DOI
      10.1088/1475-7516/2016/02/008
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Anisotropies of gravitational-wave standard sirens as a new cosmological probe without redshift information2016

    • Author(s)
      T.~Namikawa, A.~Nishizawa, and A.~Taruya,
    • Journal Title

      Physical Review Letters

      Volume: 116 Pages: 121302-121302

    • DOI
      10.1103/physrevlett.116.121302
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Dynamics of Peccei-Quinn Breaking Field after Inflation and Axion Isocurvature Perturbations.2015

    • Author(s)
      K. Harigaya, M. Ibe, M. Kawasaki and T. T. Yanagida
    • Journal Title

      JHEP

      Volume: 1511 Pages: 003-003

    • DOI
      10.1088/1475-7516/2015/11/003
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Structural Properties of Non-spherical Dark Halos in Milky Way …2015

    • Author(s)
      K.~Hayashi, M.~Chiba,
    • Journal Title

      Structural properties of dark halos in the Milky Way and Andromeda dwarf spheroidal galaxies

      Volume: 810 Pages: 1-17

    • DOI
      10.1088/0004-637x/810/1/22
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Gas Inflow and Outflow Histories in Disk Galaxies ...2015

    • Author(s)
      D.~Toyouchi, M.~Chiba
    • Journal Title

      The Astrophysical Journal

      Volume: 810 Pages: 1-11

    • DOI
      10.1088/0004-637x/810/1/18
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] すばるPFSが拓く近傍宇宙論と銀河暗黒物質の正体の解明2018

    • Author(s)
      千葉柾司
    • Organizer
      日本天文学会春季年会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Nonlinear structure formation in cold dark matter cosmology2018

    • Author(s)
      Atsushi Taruya
    • Organizer
      Innovative area symposium
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Grid-based calculation for perturbation theory of large-scale structure2018

    • Author(s)
      Atsushi Taruya
    • Organizer
      天文学会春の年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Formation of primordial black holes in multi-field inflation models2018

    • Author(s)
      Masahiro Kawasaki
    • Organizer
      14th Interational Conference of Computational Method in Science and Engineering
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Galactic Archaeology2017

    • Author(s)
      千葉柾司
    • Organizer
      PFS Collaboration Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Novel scheme for perturbation theory calculation of large-scale structure2017

    • Author(s)
      樽家篤史
    • Organizer
      One day workshop on modified gravity and large-scale structure 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Challenges in perturbation theory calculation of large-scale structure2017

    • Author(s)
      樽家篤史
    • Organizer
      Cosmological Quest for the Next Decade
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Relativistic distortions of large-scale structure2017

    • Author(s)
      樽家篤史
    • Organizer
      The 3rd CosKASI-ICG-NAOC-YITP joint workshop
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 大規模構造で探る宇宙と摂動論2017

    • Author(s)
      樽家篤史
    • Organizer
      物理学会秋季大会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 宇宙の大規模構造の記述:観測から理論まで2017

    • Author(s)
      樽家篤史
    • Organizer
      研究会「生物から宇宙までの非線形現象」
    • Related Report
      2017 Annual Research Report
  • [Presentation] Relativistic distortions of large-scale structure2017

    • Author(s)
      樽家篤史
    • Organizer
      KIAS-YITP joint workshop
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Perturbative description of Vlasov-Poisson system in cosmology2017

    • Author(s)
      Atsushi Taruya
    • Organizer
      Collisionless Boltzmann (Vlasov) Equation and Modeling of Self-Gravitating systems and Plasmas
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 理研シンポ・iTHES/iTHEMS研究会「非平衡物理の最前線」2017

    • Author(s)
      Atsushi Taruya
    • Organizer
      2017
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Primordial black holes in multi-field inflation models2017

    • Author(s)
      Masahiro Kawasaki
    • Organizer
      PASCOS 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cosmological problems of QCD axion2017

    • Author(s)
      Masahiro Kawasaki
    • Organizer
      International workshop on "Axion physics and dark matter cosmology
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The ALP miracle2017

    • Author(s)
      Fuminobu Takahashi
    • Organizer
      7th General IAXO Collaboration Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The ALP miracle: axionic unification of inflation and dark matter2017

    • Author(s)
      Fuminobu Takahashi
    • Organizer
      Post-inflationary String Cosmology
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Axions2017

    • Author(s)
      Fuminobu Takahashi
    • Organizer
      ダークマター研究会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Axions2017

    • Author(s)
      Fuminobu Takahashi
    • Organizer
      10th Anniversary Symposium of IPMU
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Cosmological evolution of axion and hidden sector2017

    • Author(s)
      Fuminobu Takahashi
    • Organizer
      Axion physics and dark matter cosmology
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Production of primordial black holes in the inflationary universe2017

    • Author(s)
      川崎 雅裕
    • Organizer
      Physics in LHC and the early universe
    • Place of Presentation
      東京大学(東京都文京区)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Dark matter on small scales - dwarf galaxies and J-factor2017

    • Author(s)
      千葉柾司
    • Organizer
      新学術領域シンポジウム
    • Place of Presentation
      高エネルギー加速器研究機構
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Cosmological roles of axions within the reach of future experiments2017

    • Author(s)
      高橋 史宜
    • Organizer
      CERN-EPFL-Korea Theory Institute “New Physics at the Intensity Frontier”
    • Place of Presentation
      CERN、ジュネーブ(スイス)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Gauge Coupling Unification with Hidden Photon and Minicharged Dark Matter2017

    • Author(s)
      横崎 統三
    • Organizer
      III Saha Theory Workshop: Aspects of Early Universe Cosmology
    • Place of Presentation
      Saha Institute of Nuclear Physics, India
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Post-collapse perturbation theory in 1D cosmology2016

    • Author(s)
      樽家篤史
    • Organizer
      日本天文学会春季年会
    • Place of Presentation
      首都大学東京(東京都,八王子)
    • Year and Date
      2016-03-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] Big bang nucleosynthesis and particle physics2016

    • Author(s)
      川崎雅裕
    • Organizer
      New Generation Quantum Theory
    • Place of Presentation
      京都大学(京都府,京都市)
    • Year and Date
      2016-03-08
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Cosmology with large-scale structure of the Universe2016

    • Author(s)
      樽家篤史
    • Organizer
      New generation quantum theory
    • Place of Presentation
      京都大学工学部(京都府,京都市)
    • Year and Date
      2016-03-08
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] A model of heavy QCD axion2016

    • Author(s)
      伊部昌宏
    • Organizer
      Beyond the Standard Model in Okinawa 2016
    • Place of Presentation
      沖縄科学技術大学(沖縄県,国頭郡)
    • Year and Date
      2016-03-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Updates from Local Group/GA WG2016

    • Author(s)
      千葉柾司
    • Organizer
      Subaru HSC Survey Collaboration Meeting
    • Place of Presentation
      台湾中央研究院天文及天文物理研究所(台湾)
    • Year and Date
      2016-01-15
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Formation of primordial black holes in double inflation2016

    • Author(s)
      川崎 雅裕
    • Organizer
      Particle Astrophysics and Cosmology Including Fundamental Interactions
    • Place of Presentation
      Moorea, French Polynesia
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 近傍宇宙論:恒星系の化学動力学から探る銀河形成と進化2016

    • Author(s)
      千葉柾司
    • Organizer
      理論懇シンポジウム
    • Place of Presentation
      東北大学(宮城県仙台市)
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] Redshift-space distortions as a probe of gravity2016

    • Author(s)
      樽家 篤史
    • Organizer
      Nonlinear evolution of the LSS of the Universe: Theory meets Expectations
    • Place of Presentation
      Institut d'Astrophysique de Paris、フランス
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Gravitational waves and structure formation2016

    • Author(s)
      樽家 篤史
    • Organizer
      Gravitational waves and cosmology & 3rd eLISA cosmology working group workshop
    • Place of Presentation
      DESY、ハンブルク(ドイツ)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Higgs vacuum metastability in inflation, preheating, and reheating2016

    • Author(s)
      郡 和範
    • Organizer
      The First KEK-KIAS-NCTS Joint Workshop on Particle Physics Phenomenology
    • Place of Presentation
      NCTS, Hsinchu, Taiwan
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Dark matter in cosmology2016

    • Author(s)
      郡 和範
    • Organizer
      DBD16 workshop
    • Place of Presentation
      大阪大学吹田キャンパス(大阪府吹田市)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Axions2016

    • Author(s)
      高橋 史宜
    • Organizer
      Invisibles 16
    • Place of Presentation
      Padova(イタリア)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Galactic Archaeology2015

    • Author(s)
      千葉柾司
    • Organizer
      Subaru PFS Collaboration Meeting
    • Place of Presentation
      マルセイユ天体物理研究所(フランス)
    • Year and Date
      2015-12-16
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Reinterpretation of the Starobinsky-type inflation models2015

    • Author(s)
      郡 和範
    • Organizer
      LeCosPA
    • Place of Presentation
      National Taiwan University(台湾)
    • Year and Date
      2015-12-15
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Why do we need dr < 0.001 (Lyth bounds etc.)2015

    • Author(s)
      郡 和範
    • Organizer
      B-mode from Space
    • Place of Presentation
      IPMU、東大柏キャンパス(千葉県,柏市)
    • Year and Date
      2015-12-10
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Axion cosmology - The Witten effect and mixings -2015

    • Author(s)
      高橋史宜
    • Organizer
      Particle Cosmology and beyond 2015
    • Place of Presentation
      金沢大学(石川県,金沢市)
    • Year and Date
      2015-11-19
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Disappearing Inflaton Potential2015

    • Author(s)
      高橋史宜
    • Organizer
      CosPA2015
    • Place of Presentation
      IBS, Daejeong, Korea
    • Year and Date
      2015-10-12
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Particle physics theory: Cosmology2015

    • Author(s)
      郡 和範
    • Organizer
      The 4th Particle Physics School in South-East Asia
    • Place of Presentation
      Vietnam National University of Science、ハノイ、ベトナム
    • Year and Date
      2015-09-17
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A novel scheme for perturbation theory calculation of large-scale structure2015

    • Author(s)
      樽家篤史
    • Organizer
      Theoretical and Observational Progress on Large-sacle Structure
    • Place of Presentation
      欧州南天文台本部、ガルヒング
    • Year and Date
      2015-07-22
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Book] 宇宙はどのような時空でできているのか2016

    • Author(s)
      郡 和範
    • Total Pages
      288
    • Publisher
      ベレ出版
    • Related Report
      2015 Annual Research Report
  • [Remarks] 研究成果】大統一理論の新しい枠組み ~微細電荷を持った暗黒物質の予言~

    • URL
      http://www.sci.tohoku.ac.jp/news/20170529-9121.html
    • Related Report
      2017 Annual Research Report
  • [Remarks] アクシオンと宇宙論:共鳴現象による位相欠陥生成

    • URL
      http://www.phys.tohoku.ac.jp/topics/topics-468/
    • Related Report
      2015 Annual Research Report
  • [Funded Workshop] KEK-Cosmo 2017 workshop, ``Fundamental Physics in the Universe''2017

    • Place of Presentation
      KEK つくばキャンパス
    • Year and Date
      2017-02-20
    • Related Report
      2016 Annual Research Report

URL: 

Published: 2015-07-02   Modified: 2019-07-17  

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