Investigation of the phase structure and excited modes under extremum environment in the strong intaraction

强内陷极值环境下的相结构和激发模式研究

• 批准号: 23540311
• 负责人: TSUE Yasuhiko
• 金额: $ 2.83万
• 依托单位: Kochi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23540311/
• 关键词: 高密度クォーク物質; QCD物性; クォーク物質; フェルミオン多体系; クォーク強磁性; 相転移; 極限環境; クォーク・ハドロン; グルオン多体系

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.

在量子色动力学（QCD）控制的强相互作用中，利用具有张量型四点相互作用的 Nambu-Jana-Lasinio（NJL）模型表明，夸克自旋极化是在高重子密度下实现的夸克之间。随着夸克数密度的增加，自旋极化发生。然后，二味彩色超导性消失。通过使用包含夸克之间八点相互作用的扩展NJL模型，表明该模型中存在一个新相，其中手性对称性恢复，但真空上的基本激发对应于核子。对于纯杨-米尔斯规范理论，在高斯函数逼近中构造了瞬态变分方法。给出了标量和伪标量胶球质量，并阐明了胶球质量对 QCD 运行耦合常数和 QCD 尺度参数的依赖性。

项目成果

A Role of the Quasiparticle in the Conservation of the Fermion Number--- An Example Illustrative of the Deformation of the Cooper Pair ---

准粒子在费米子数守恒中的作用---库珀对变形的示例说明---

• DOI: 10.1143/ptp.128.717
• 发表时间: 2012
• 作者: Y. Tsue; C. Providencia; J. da Providencia;M. Yamamura
• 通讯作者: M. Yamamura

On the Color-Singlet States in Many-Quark Model with the su(4)-Algebraic Structure. II

具有su(4)-代数结构的多夸克模型中的颜色单线态。

• DOI: 10.1143/ptp.126.293
• 发表时间: 2011
• 作者: Y. Tsue; C. Providencia; J. da Providencia;M. Yamamura
• 通讯作者: M. Yamamura

On the Color-Singlet States in Many-Quark Model with the su(4)-Algebraic Structure.III --Transition from the Quark-Triplet to the Quark-Pair Phase ---

关于su(4)-代数结构多夸克模型中的颜色单线态III --从夸克三重态到夸克对相的转变---

• DOI: 10.1143/ptp.126.313
• 发表时间: 2011
• 作者: Y. Tsue; C. Providencia; J. da Providencia;M. Yamamura
• 通讯作者: M. Yamamura

高密度クォーク物質でのクォークスピン偏極

稠密夸克物质中的夸克自旋极化

• 作者: 津江保彦;J da Providencia; C.Providencia;山村正俊
• 通讯作者: 山村正俊

Re-formation of Many-Quark Model with the su(4)-Algebraic Structure in the Schwinger Boson Realization--- Reconsideration in the Original Fermion Space ---

施温格玻色子实现中用su(4)-代数结构重构多夸克模型---原费米子空间中的重新思考---

• DOI: 10.1143/ptp.127.751
• 发表时间: 2012
• 作者: Y. Tsue; C. Providencia; J. da Providencia;M. Yamamura
• 通讯作者: M. Yamamura