Masamichi Zaizen

Profile Information

Affiliation: Project Researcher, Department of Earth Science and Astronomy, Graduate School of Arts and Sciences, The University of Tokyo

Degree: Doctor of Philosophy(Mar, 2022, The University of Tokyo)

Contact information: mzizng.ecc.u-tokyo.ac.jp
Researcher number: 61000089
ORCID iD: https://orcid.org/0000-0001-7305-1683
J-GLOBAL ID: 202401012938343253
researchmap Member ID: R000065140

External link: https://mzizn.github.io/

Research Areas

Natural sciences / Astronomy / Supernova
Natural sciences / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics / Neutrino
Natural sciences / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics / Supernova

Research Interests

Research History

Sep, 2024 - Present

Project Researcher, Department of Earth Science and Astronomy, Graduate School of Arts and Sciences, The University of Tokyo
Apr, 2022 - Aug, 2024

JSPS Fellow PD, Faculty of Science and Engineering, Waseda University
Sep, 2023 - Mar, 2024

Part-time Instructor, Faculty of Science and Technology, Tokyo University of Science
2020 - Mar, 2022

JSPS Fellow DC2, Graduate School of Science Department of Astronomy, The University of Tokyo

Education

Apr, 2019 - Mar, 2022

Ph.D., Department of Astronomy, Graduate School of Science, The University of Tokyo
Apr, 2017 - Mar, 2019

M.S., Department of Astronomy, Graduate School of Science, The University of Tokyo
Apr, 2013 - Mar, 2017

B.S., Department of Astronomy, Faculty of Science, The University of Tokyo

Awards

Oct, 2024

第11回成果報告会におけるHPCI利用研究課題優秀成果賞, 高エネルギー天体現象中の量子運動論的ニュートリノ輸送シミュレーション (hp230033), 一般財団法人高度情報科学技術研究機構(RIST)

長倉洋樹, 原田了, 財前真理, 加藤ちなみ, 赤穂龍一郎
May, 2021

ポスター優秀発表賞, 新学術「地下宇宙」2021年領域研究会

財前真理
Mar, 2019

研究奨励賞, 東京大学大学院理学系研究科

財前真理
Jul, 2018

オーラルアワード, 第48回天文・天体物理若手夏の学校

財前真理
Mar, 2017

学修奨励賞, 東京大学理学部

財前真理

Papers

Resolution requirements for numerical modeling of neutrino quantum kinetics

Hiroki Nagakura, Masamichi Zaizen, Jiabao Liu, Lucas Johns

Physical Review D, Feb 11, 2025 Peer-reviewed
Quasisteady evolution of fast neutrino-flavor conversions

Jiabao Liu, Hiroki Nagakura, Masamichi Zaizen, Lucas Johns, Ryuichiro Akaho, Shoichi Yamada

Physical Review D, Jan 28, 2025 Peer-reviewed
Muon-induced collisional flavor instability in core-collapse supernova

Jiabao Liu, Hiroki Nagakura, Ryuichiro Akaho, Akira Ito, Masamichi Zaizen, Shun Furusawa, Shoichi Yamada

Physical Review D, 110(4), Aug 27, 2024 Peer-reviewed
Fast neutrino-flavor swap in high-energy astrophysical environments

Masamichi Zaizen, Hiroki Nagakura

Physical Review D, Apr 25, 2024 Peer-reviewed
Bhatnagar-Gross-Krook subgrid model for neutrino quantum kinetics

Hiroki Nagakura, Lucas Johns, Masamichi Zaizen

Physical Review D, Apr 9, 2024 Peer-reviewed
Collisional and fast neutrino flavor instabilities in two-dimensional core-collapse supernova simulation with Boltzmann neutrino transport

Ryuichiro Akaho, Jiabao Liu, Hiroki Nagakura, Masamichi Zaizen, Shoichi Yamada

Physical Review D, Jan 8, 2024 Peer-reviewed
Universality of the neutrino collisional flavor instability in core-collapse supernovae

Jiabao Liu, Ryuichiro Akaho, Akira Ito, Hiroki Nagakura, Masamichi Zaizen, Shoichi Yamada

Physical Review D, Dec 14, 2023 Peer-reviewed
Basic characteristics of neutrino flavor conversions in the postshock regions of core-collapse supernova

Hiroki Nagakura, Masamichi Zaizen

Physical Review D, Dec 4, 2023 Peer-reviewed
Flavor conversions with energy-dependent neutrino emission and absorption

Chinami Kato, Hiroki Nagakura, Masamichi Zaizen

Physical Review D, Jul 5, 2023 Peer-reviewed
Characterizing quasisteady states of fast neutrino-flavor conversion by stability and conservation laws

Masamichi Zaizen, Hiroki Nagakura

Physical Review D, Jun 16, 2023 Peer-reviewed
Systematic study of the resonancelike structure in the collisional flavor instability of neutrinos

Jiabao Liu, Masamichi Zaizen, Shoichi Yamada

Physical Review D, Jun 9, 2023 Peer-reviewed
Simple method for determining asymptotic states of fast neutrino-flavor conversion

Masamichi Zaizen, Hiroki Nagakura

Physical Review D, May 11, 2023 Peer-reviewed
Connecting small-scale to large-scale structures of fast neutrino-flavor conversion

Hiroki Nagakura, Masamichi Zaizen

Physical Review D, Mar 30, 2023 Peer-reviewed
Time-Dependent and Quasisteady Features of Fast Neutrino-Flavor Conversion

Hiroki Nagakura, Masamichi Zaizen

Physical Review Letters, Dec 19, 2022 Peer-reviewed
Code comparison for fast flavor instability simulations

Sherwood Richers, Huaiyu Duan, Meng-Ru Wu, Soumya Bhattacharyya, Masamichi Zaizen, Manu George, Chun-Yu Lin, Zewei Xiong

Physical Review D, Aug 10, 2022 Peer-reviewed
Nonlinear evolution of fast neutrino flavor conversion in the preshock region of core-collapse supernovae

Masamichi Zaizen, Taiki Morinaga

Physical Review D, Oct 27, 2021 Peer-reviewed
Three-flavor collective neutrino conversions with multi-azimuthal-angle instability in an electron-capture supernova model

Masamichi Zaizen, Shunsaku Horiuchi, Tomoya Takiwaki, Kei Kotake, Takashi Yoshida, Hideyuki Umeda, John F. Cherry

Physical Review D, 103(6), Mar 8, 2021 Peer-reviewed
Neutrino halo effect on collective neutrino oscillation in iron core-collapse supernova model of a 9.6 M⊙ star

Masamichi Zaizen, John F. Cherry, Tomoya Takiwaki, Shunsaku Horiuchi, Kei Kotake, Hideyuki Umeda, Takashi Yoshida

Journal of Cosmology and Astroparticle Physics, 2020(06) 011-011, Jun 4, 2020 Peer-reviewed
Collective flavor conversion including the neutrino halo in core-collapse supernovae

Masamichi Zaizen, John F. Cherry, Tomoya Takiwaki, Shunsaku Horiuchi, Kei Kotake, Hideyuki Umeda, Takashi Yoshida

Journal of Physics: Conference Series, 1468 012137-012137, Feb, 2020
Collective neutrino oscillations and detectabilities in failed supernovae

Masamichi Zaizen, Takashi Yoshida, Kohsuke Sumiyoshi, Hideyuki Umeda

Physical Review D, 98(10), Nov 27, 2018 Peer-reviewed

Presentations

Nonlinear Dynamics of Neutrino Flavor Conversion in Supernovae

Masamichi Zaizen

Breaking New Ground in Supernova Physics 2025 (BNGSP25), Feb 26, 2025
Flavor coherence and asymptotic state in fast neutrino-flavor conversion

Masamichi Zaizen

JOINT N3AS - iTHEMS Meeting on Quantum Information Science in Multimessenger Astrophysics, Jun 16, 2024 Invited
Stability and Boundary Constraints Characterizing Asymptotic Behaviors of Fast Flavor Conversion

Masamichi Zaizen

Focus workshop on collective oscillation and chiral transport of neutrinos, Mar 17, 2023 Invited
Development of collective fast neutrino flavor conversion

Masamichi Zaizen

Probe into core-collapse SuperNovae via Gravitational-Wave and neutrino signals (SNeGWv2021), Dec 2, 2021 Invited
Fast neutrino flavor conversion induced by the coherent backward scatterings in the core-collapse supernovae

Masamichi Zaizen

17th International Conference on Topics in Astroparticles and Underground Physics (TAUP2021), Aug 31, 2021
Neutrino halo on collective neutrino oscillation in core-collapse supernovae

Masamichi Zaizen

Multi-dimensional Modeling and Multi-Messenger observation from Core-Collapse Supernovae (4M-COCOS), Oct 22, 2019
Collective flavor conversion including the neutrino halo in core-collapse supernovae

Masamichi Zaizen

16th International Conference on Topics in Astroparticles and Underground Physics (TAUP2019), Sep 11, 2019
Collective neutrino oscillations

Masamichi Zaizen

Workshop on core-collapse supernova explosions and related physics, Aug 6, 2019

Research Projects

超新星爆発内部で自己相互作用が引き起こすニュートリノ集団振動の影響の研究

科学研究費助成事業, 特別研究員奨励費, 日本学術振興会, Mar, 2023 - Mar, 2025

財前真理
超新星爆発時のニュートリノ相互作用が引き起こすニュートリノ振動の多次元効果の研究

科学研究費助成事業, 特別研究員奨励費, 日本学術振興会, Apr, 2020 - Mar, 2022

財前真理

Teaching Experience

Sep, 2023 - Mar, 2024

Exercises in Quantum Mechanics (Tokyo University of Science)

Professional Memberships

May, 2024 - Present

Physical Society of Japan
May, 2020 - Present

Community of Theoretical Astrophysics
May, 2017 - Present

Astronomical Society of Japan

Academic Activities

Reviewers, Physical Review D

Peer review

American Physical Society

Profile Information

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