| Project/Area Number |
15K05082
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Kyushu University |
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Principal Investigator |
Harada Koji 九州大学, 基幹教育院, 教授 (00202268)
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| Research Collaborator |
YAHIRO masanobu
SASABE satoru
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 核子系有効場理論 / 繰り込み群 / 格子シミュレーション / 核子系有効場 |
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| Outline of Final Research Achievements |
We study how to formulate Nuclear Effective Field Theory, in which nucleons (and pions) are treated as fundamental degrees of freedom, on a lattice to numerically simulate high-density systems at low temperature. In the physical values of four-nucleon coupling constants, the lattice action is complex so that the straightfoward Markov-chain Monte Carlo method is not feasible. We propose a reweighting method in which the "reference fermion determinant" is chosen on the basis of the renormalization group analysis.
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| Academic Significance and Societal Importance of the Research Achievements |
核物理学を支配する強い相互作用の基本理論はQCDであり、格子QCDシミュレーションはその非摂動論的な計算方法として広く認知されている。しかし、格子QCDシミュレーションには符号問題と呼ばれる障害があって、高密度・低温領域での計算は現段階では難しい。核子系有効場理論に基づく定量的な計算が実施されれば、中性子星の物理など、広い分野にわたって影響を与える結果を得ることが出来る。
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