2013 Fiscal Year Final Research Report
Investigation of the phase structure and excited modes under extremum environment in the strong intaraction
| Project/Area Number |
23540311
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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 | Kochi University |
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Principal Investigator |
TSUE Yasuhiko 高知大学, 教育研究部自然科学系, 教授 (10253337)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 高密度クォーク物質 / QCD物性 |
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| Research Abstract |
In the strong interaction governed by the quantum chromodynamics (QCD), it has been shown that the quark-spin polarization is realized at high baryon density by using the Nambu-Jana-Lasinio (NJL) model with the tensor-type four-point interaction between quarks. As the quark-number density is increasing, the spin-polarization occurs. Then, the two-flavor color superconductivity disappears. By using the extended NJL model which incorporates the eight-point interaction between quarks, it has been shown that there exists a new phase in this model in which the chiral symmetry recovers but the elementary excitation on the vacuum corresponds to nucleon. For the pure Yang-Mills gauge theory, the time-dependent variational method has been constructed within the Gaussian functional approximation. The scalar and pseudo scalar glueball masses have been given and the dependence of glueball masses on the QCD running coupling constant and QCD scale parameter has been clarified.
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Research Products
(25 results)
