| Project/Area Number |
25400247
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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 | The Open University of Japan (2015-2016)
The University of Tokyo (2013-2014) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
藤井 宏次 東京大学, 大学院総合文化研究科, 助教 (10313173)
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| Research Collaborator |
Watanabe Kazuhiro 東京大学, 大学院総合文化研究科
Yamazaki Kanako 東京大学, 大学院理学系研究科
Taya Hidetoshi 東京大学, 大学院理学系研究科
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 高温ハドロン/クォーク物質 / クォーク閉じ込めの有効理論 / 高エネルギー重イオン衝突 / クォーク・グルーオンプラズマ / クォーク・ハドロン相転移 / クォークの有効模型 / PNJL模型 / QCD相図 / 相対論的原子核衝突 / カイラル相転移 / 非閉じ込め転移 / 高エネルギー原子核衝突 |
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| Outline of Final Research Achievements |
Transition from low temperature hadron phase to high temperature quark phase was studied theoretically in terms of an effective theory (PNJL model) incorporating chiral symmetry and quark confinement. In the baryon free regime as realized in high energy nuclear collisions, the low temperature phase is filled with thermal bosonic excitations of low mass pions and kaons, which turns into the high temperature phase filled with quark and anti-quark excitations in gluon thermal excitations. In this description, pions and kaons are described as collective excitations consisting of quark and antiquark. We studied how the degrees of thermal excitations change by varying temperature from boson-type to fermion-type excitations focusing on the entropy contents of the system.
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