Systematic Study on Precursory Phenomena of Chiral Phase Transition in Hadronic Matter

强子物质手性相变前驱现象的系统研究

基本信息

批准号：
14540263
负责人：
KUNIHIRO Teiji
金额：
$ 1.98万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

The purposes of this project is to investigate systematically the characteristic properties and the precursory phenomena of the chiral transition and the color superconductivity(CSC) at finite T and density, and thereby elucidate the possible methods to verify them experimentally :(1)We have clarified how the possible chiral restoration affects the strength function in the sigma and the rho meson channels in a nonlinear sigma model.(2)We have explored the possibility to create the σ mesic nuclei using (d,^3He) and (d,t) reactions.(3)We have indicated that the anomalous behavior of the π in deeply bound pionic nuclei and also the anomalous enhancement of the strength function near the 2m_π threshold in π- or γ-induced 2π creations can be unifiedly described in terms of the wave function renormalization of the π in the nuclear media.(4)We have shown that the σ meson with a mass roughly degenerate with the rho meson can exist in the full Lattice QCD simulation.(5)We have shown that the quark spectra can be drastically modified due to the coupling with the soft mode of the chiral transition at finite T.(6)We have shown that the vector-type interaction can modify the phase diagram at low temperature so as to make another critical end point in the QCD phase diagram.(7)The precursory soft mode of the CSC can exist with a prominent strength even well above the critical temperature of the CSC.(8)The soft mode of the CSC affects the quark properties near but above Tc so that the quark matter may become a non-Fermi liquid, making a pseudogap in the density of states of the quarks.

The purposes of this project is to investigate systematically the characteristic properties and the precursory phenomena of the chiral transition and the color superconductivity(CSC) at finite T and density, and thereby elucidate the possible methods to verify them experimentally :(1)We have clarified how the possible chiral restoration affects the strength function in the sigma and the rho meson channels in a nonlinear sigma model.(2)We已经探索了使用（d，^3he）和（d，t）反应创建σ介质核的可能性。（3）我们表明，在深层的先驱核中，π的异常行为的异常行为以及在π-或γ诱导的2π创造中的2m_πthreshold的强度的异常增强功能的异常增强功能，从而在π-或γ诱导的范围内进行了指定。（4）我们已经表明，具有质量大致与Rho Meson大致退化的σ介子可以在完整的晶格QCD模拟中存在。（5）我们已经表明，由于可以在较低的温度下，Quark Spectra可以彻底修改QCD。 QCD相图中的另一个关键终点。（7）CSC的前体软模式可以以明显的强度甚至高于CSC的临界温度。（8）CSC的软模式会影响附近但高于TC的夸克特性，从而使夸克物质成为非fermi液体，从而使Quarks of Quarks of Quarks的液体成为一个pseudogap。