UToyamaTheory:top

Theoretical Physics Group, Faculty of Science, Univ. of Toyama

We are studying particle physics in theoretical & phenomenological approaches

●	Topics	:	Particle phenomenology・Particle cosmology
●	Keywords	:	Higgs・Dark matter・Gravitational wave・Phase transition・Neutrino
●	Features	:	A small but focused team of faculty & students advancing research together
		:	Collaborations with experimental astroparticle phys. group
		:	We invite many visitors from various institutes
		:	(List of External members・Previous visitors)

News

2025/07/29: Upcoming Motoko Fujiwara gives a seminar @Shinshu U.:
"Particle Dark Matter: A Bird’s-Eye View of Recent Progress"
2025/07/26: Upcoming Y. Takenami(D1), Y. Iwazaki(D2), S. Ohzawa(D3) & M. Fujiwara give Presentations @Hokuriku Summer Camp:
2025/07/14: Seminar by Prof. M. Eto :
"Topological solitons in field theories: How ubiquitous are they in nature?"
2025/07/03: Article of Shuhei Ohzawa(D3) & Motoko Fujiwara(Ass. Prof.) was published in U. Toyama's Web page:
"Research stay at Mainz University (Germany)"
2025/07/02: Motoko Fujiwara gave a seminar @Tokyo Women's Christian University:
"Particle Dark Matter: A Bird’s-Eye View of Recent Progress"
2025/06/26: Prof. T. Toma (Kanazawa U.) visits us for discussion
2025/06/23: Seminar by K. Mizukoshi (Tohoku U.) :
"南極長期周回気球を用いた暗黒物質探索実験GAPS"
2025/06/17: Motoko Fujiwara submitted a new paper:
"Dark matter spikes with strongly self-interacting particles"
2025/06/12: Shuhei Ohzawa(D3) presented his poster @HPNP2025
"Feasibility of Higgs Potential Shape Classification at Future Colliders"
2025/06/09: Motoko Fujiwara gave a talk @HPNP2025
"Resummed multi-line gamma-ray spectra for Cherenkov Telescopes from heavy spin-1 dark matter"
2025/06/09: Mitsuru Kakizaki organized an international workshop @Osaka
International Workshop on "Higgs as a Probe of New Physics 2025 (HPNP2025)
2025/05/19: Seminar by L. Treuer (YITP・Sokendai) :
"Higgs Boson Production at µ^+ µ^+ Colliders"
2025/05/13: 🇩🇪 Motoko Fujiwara gave a seminar @JSPS career forum in Bonn
"What's next for two-year research stay in Germany?"
2025/05/08: 🇩🇪 Motoko Fujiwara gave a seminar @Mainz Institute for Theoretical Physics
"Soft Collinear Eﬀective Theory for heavy dark matter annihilation: spin-0, 1/2 & 1"
2025/05/05: 🇩🇪 Shuhei Ohzawa (D3) & Motoko Fujiwara (Ass. Prof.) have started 2-week visit in U. Mainz, Germany
2025/04/21: Seminar by K. Nakamori (Yamagata U.) :
"Science communication activities on cosmic-rays and astronomy"
2025/04/01: Congrats! M. Kikuchi (our almunus: 2011-2016) has started her associate prof. position @Saga U.
2025/04/01: Congrats! K. Yagu (our almunus: 2007-2012) has started his associate prof. position @Tokyo U. of Science
2025/03/25: New B4 students have been assigned
*+* Welcome to Theoretical Phys. Group *+*
2025/03/24: Seminar by M. Tachibana (Saga U.) [on blackboards] :
"Neutron Stars and Quark-Hadron Continuity"
2025/03/24: Seminar by K. Funakubo (Saga U.) :
"Renormalization group improvement for thermally resummed effective potential"
2025/03/18: Final lecture by Prof. Kurimoto
2025/03/18: Motoko Fujiwara gave an lecture @the JPS 2025 Spring meeting:
Neutron star as dark matter probe [Lecture of the Young Scientist Award of JPS]
2025/03/17: Seminar by S. Lederer (Tokyo U. of Science) :
"Excited bound states and their role in dark matter production"
2025/03/13: Seminar by T. Sora (U. Osaka) :
"An extended Higgs model for neutrino mass, dark matter, and baryon asymmetry"
2025/03/3: Motoko Fujiwara submited a new paper:
Resummed multi-line gamma-ray spectra for Cherenkov Telescopes from heavy spin-1 dark matter
2025/02/20: Shuhei Ohzawa (D2) gave an oral presentation @KEK-PH2025:
"Constraints on Trilinear Higgs Couplings Including One-loop Correction in Nearly Aligned Higgs Models"
2025/02/20: Motoko Fujiwara gave an plenary talk @KEK-PH2025:
"Soft Collinear Effective Theory for heavy dark matter annihilation"
2025/02/17: Seminar by K. Hashino (NIT, Fukishima College) :
"Probing BSM effects for realizing first-order phase transition"
2025/02/13: Seminar by S. Mishima (Saitama Medical U.) :
"Current status of B anomalies"
2025/01/28: Seminar by N. Osamura (Nagoya U.) :
"Impact of the Electroweak Weinberg Operator on the Electric Dipole Moment of Electron"
2025/01/27: Seminar by N. Osamura (Nagoya U.) :
"Novel loop-diagrammatic approach to QCD theta parameter"
2025/1/21: Motoko Fujiwara submited a new paper:
Boosted dark matter from semi-annihilations in the Galactic Center
2024/12/1: Motoko Fujiwara submited a new paper:
Neutrino Diffusion within Dark Matter Spikes
2024/12/1: Motoko Fujiwara has started her assistant professor position

2024/02/28: Theoretical Physics Seminar "Overview of flavor anomaly" is held.
2024/01/29: Theoretical Physics Seminar "行列正則化の一般化とその応用" is held.
2024/01/16: Theoretical Physics Seminar "WIMP DM Heating in Neutron Stars" is held.
2024/01/10: Theoretical Physics Seminar "ヒッグスセクターと新物理、地上実験と宇宙実験での検証" is held.
2023/12/12: Theoretical Physics Seminar "The birth of binary compact objects" is held.
2023/11/16: Theoretical Physics Seminar "Lepton Flavor and Neutrino Oscillation" is held.
2023/10/31: Theoretical Physics Seminar "21cm line as a probe of BSM" is held.
2023/08/07: Theoretical Physics Seminar "A primordial black hole tale: from cosmological aspects to astrophysical searches" is held.
2023/07/18: Theoretical Physics Seminar "Dynamical small field inflation triggered in the supercooled universe" is held.
2023/06/27: Theoretical Physics Seminar "Formulation of mixed/polychronic tunneling in a quantum many-body system" is held.
2023/06/23: Theoretical Physics Seminar "原子超流動体中の不純物間に働くファン・デル・ワールス力" is held.
2023/06/21: A special lecture course "有効場の理論入門ー非相対論的多体問題を例にして" by Dr. Masaru Hongo (Niigata U.) is held on Jun. 21, 22, and 23.
2023/06/19: Theoretical Physics Seminar "Asymmetric SIMP Dark Matter" is held.
2023/05/31: Theoretical Physics Seminar "Multi-photon signatures at LHC and future linear colliders as a probe of CP-Violation in 2HDMs" is held.
2023/04/01: Mr. Ozawa is accepted to the "Support for Pioneering Research Initiated by the Next Generation" of University of Toyama.
2023/04/01: Our alumni Dr. Hashino (Ph.D in Mar.2019) arrives at the assistant professor of the National Institue of Technology, Fukushima College.
2023/04/01: Our alumni Dr. Matsui (Ph.D in Mar.2016) arrives at the assistant professor of the National Institue of Technology, Kure College.
2023/03/31: Theoretical Physics Seminar U(1)ゲージ対称性の破れによる素粒子３大問題の同時解決" is held.
2023/02/06: Theoretical Physics Seminar "Gravitational Waves from Feebly Interacting Particles in a First Order Phase Transition" is held. (PCF2022-2023)
2022/11/01: Our alumni Dr. Sakurai (Ph.D in Mar.2019) arrives at the assistant professor of the University of Warsaw.
2022/10/31: Theoretical Physics Seminar "Searches for Dark Matter with Cherenkov telescopes: Latest results and a glimpse into the future" is held. (PCF2022-2023)
2022/10/05: Theoretical Physics Seminar "First Identification of a CMB Lensing Signal Produced by 1.5 Million Galaxies at z∼4" is held. (PCF2022-2023)
2022/07/21: dissertation hearing of Mr. Ogata is held.
Place: A425, Time: 14:45-
2022/06/14: Special lecture by Dr. Naruko (YITP) is held.
2022/05/27: Theoretical Physics Seminar "SU(N)-natural inflation" is held.
2022/04/25: Theoretical Physics Seminar "A new measurement of the cosmic birefringence" is held.
2022/04/01: Our alumni Dr. Hashino (Ph.D in Mar.2019) arrives at the postdoctoral fellow of Tokyo University of Science.
2022/03/10: Theoretical Physics Seminar by Dr. Hayashi (Ichinoseki College) is held.
2022/02/08: The 2nd part of the international workshop The 3rd Toyama International Symposium on "Physics at the Cosmic Frontier" (PCF2021) is held on Feb. 8, 22, Mar. 8, and 21.
2022/02/04: dissertation hearing of Mr. Suzuki is held.
Place: A238, Time: 13:00-
2022/02/03: Presentation of the graduation theses in AY2021 is held.
2021/02/01: Our alumni Dr. Matsui (Ph.D in Mar.2016) arrives at the postdoctoral fellow of the KIAS.
2021/12/06: International workshop The 3rd Toyama International Symposium on "Physics at the Cosmic Frontier" (PCF2021) is held on Dec. 7, 14, and 21.
2021/11/29: Dr. Hiroshima have oral presentation at Kashiwa Dark Matter Symposium 2021(11/29-12/2) held online.
2021/11/08: Mr. Ogata, Mr. Suzuki, and Dr. Hiroshima have oral presentation at "Particle Phenomenology workshop 2021" held at Osaka City University.
2021/10/25: Mr. Ogata and Prof. Kakizaki submit a new paper arXiv.
2021/10/08: Theoretical Physics Seminar "Origin of pseudo-Nambu-Goldstone dark matter and grand unification" is held.
2021/10/08: Dr. Nagisa Hiroshima (Assistant Prof.) has received "The Award for Female Researchers of the University of Toyama".
2021/09/30: Theoretical Physics Seminar "Primordial magnetic fields and its impact on the baryon asymmetry of the Universe" is held.
2021/07/29: Mr. Suzuki and Prof. Kakizaki submit a new paper arXiv.
2021/06/28: Theoretical Physics Seminar "What if a neutrinoless double beta decay is absent?" (Dr. Ishida, Toyama Prefectural U.) is held.
2021/06/03: Annual workshop of the Hokuriku Branch of the Particle Physics Group is hosted by our group.
Spcial Lecture: Dr. Kei Yagyu and Dr. Koutarou Kyutoku
2021/05/14: Special lecture of Hokuriku branch of the JPS "The recent highlights from IceCube" (Dr.Yoshida, Chiba U.) is hosted by our group.
2019/04/01: Our alumni Dr. Sakurai (Ph.D in Mar.2019) arrives at the assistant professor of the Tohoku U.
2019/04/01: Our alumni Dr. Kikuchi (Ph.D in Mar.2016) arrives at the assistant professor of the Nihon U.
2021/03/30: Dr. Hiroshima and collaborators submit a new paper on arXiv.
2021/01/04: New site opens.(See here for previous version.)
2020/09/24: Press release about our international collaboration has been published.
2020/04/18: Dr. Hiroshima had a public talk at the online event iTHEMS×academist「数理で読み解く科学の世界」 (in Japanese).
2020/01/31: Short article by Dr. Hiroshima has been published in the Astronomical Herald (ver. 2020, Feb).
2020/01/01: Dr. Nagisa Hiroshima joins our group from RIKEN as an assistant professor.
2019/07/01: Our alumni Dr. Hashino (Ph.D in Mar.2019) arrives at the postdoctral position at Peking Univ.
2019/04/08: Our alumni Dr. Sakurai (Ph.D in Mar.2019) leaves to KIT for special research purpose.
2019/03/05: Proposal by Mr. Suzuki(Ph.D student) has been adopted the Sasakawa Scientific Research Grant.
2019/02/22: Mr. Hashino(Ph.D student) has been awarded the best poster award at the international conference HPNP2019.
2019/02/01: Our alumni Dr. Yagyu(Ph.D in Mar.2012) arrives at the assistant professor of the Osaka U.
: See here for previous news.