Study of microscopic and macroscopic QGP phenomenon

微观和宏观QGP现象的研究

基本信息

批准号：
11440080
负责人：
NAKAMURA Atsushi
金额：
$ 4.93万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2002
项目状态：
已结题

项目摘要

At very high temperature or density such as the very early second of the universe and neutron stars, the confinement is expected to be broken, and QGP (quark-gluon plasma) state may be realized. Now high energy nuclear collision experiments are actively done to find the QGP.At low density and high temperature we have developed a formula to calculate derivatives of hadron masses etc. with respect to the chemical potential and observed the finite signals. We also studied SU(2) QCD and found the drop of the vector meson for the first time in lattice QCD calculations.In order to understand the phase structure of gauge theories in a non-perturbative manner, we have treated the longitudinal and transverse cornponents of gauge fields carefully with Schwinger-Dyson equation, and analyzed the phase structure in details.We studied also higher dimensional effects on low energy effective electro-weak theory in Randall-Sundrum space-time. We started RHIC experiment to search for QGP. We have observed large anisotropic flow, Jet quenching, the suppression of high transverse pion production and strong rapidity correlation in locally conserved quantities.We have developed a real 3+1 dimension relativistic fluid dynamics code, and together with an event-generator of nuclear reaction which describe the early stage of the collisions, we studied the unisotropic expansion of non-central collision under the realistic initial condition.

在非常高的温度或密度（例如宇宙和中子恒星的早期）下，预计限制将被损坏，并且可以实现QGP（夸克 - 格鲁恩等离子体）状态。现在，积极进行高能量核冲突实验以在低密度和高温下找到QGP。我们开发了一个公式来计算强子质量等方面的衍生物。相对于化学电位，并观察到有限的信号。我们还研究了SU（2）QCD，并在晶格QCD计算中首次发现了媒介媒介的下降。为了理解以非扰动方式衡量理论的相结构，我们已经仔细处理了纵向和较高的范围，并在较高的范围内进行了较高的范围，并在较高的范围内进行了逐步效应，并在较高的范围内进行了研究，并在较高的范围内进行了研究。 Randall-Sundrum时空。我们开始RHIC实验以搜索QGP。 We have observed large anisotropic flow, Jet quenching, the suppression of high transverse pion production and strong rapidity correlation in locally conserved quantities.We have developed a real 3+1 dimension relativistic fluid dynamics code, and together with an event-generator of nuclear reaction which describe the early stage of the collisions, we studied the unisotropic expansion of non-central collision under the realistic initial condition.