Scalar density fluctuation at the critical end point in the Nambu-Jona-Lasinio model

被引：108
作者：
Fujii, H [1 ]
机构：
[1] Univ Tokyo, Inst Phys, Tokyo 1538902, Japan
来源：
PHYSICAL REVIEW D | 2003年 / 67卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.67.094018
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The soft mode near the critical end point in the phase diagram of the two-flavor Nambu-Jona-Lasinio model is investigated within the leading 1/N-c approximation, with N-c being the number of colors. It is explicitly shown by studying the spectral function of the scalar channel that the relevant soft mode is the scalar density fluctuation, which is coupled with the quark number density, while the sigma meson mode stays massive.
引用
收藏
页数：7
相关论文
共 37 条
[1]   Fluctuation probes of quark deconfinement [J].
Asakawa, M ;
Heinz, U ;
Müller, B .
PHYSICAL REVIEW LETTERS, 2000, 85 (10) :2072-2075
[2]  
ASAKAWA M, 1989, NUCL PHYS A, V504, P668
[3]   Slowing out of equilibrium near the QCD critical point [J].
Berdnikov, B ;
Rajagopal, K .
PHYSICAL REVIEW D, 2000, 61 (10) :1-9
[4]   Color superconductivity and chiral symmetry restoration at non-zero baryon density and temperature [J].
Berges, J ;
Rajagopal, K .
NUCLEAR PHYSICS B, 1999, 538 (1-2) :215-232
[5]   Ising-like dynamical signatures and the end point of the QCD transition line -: art. no. 125011 [J].
Borsányi, S ;
Patkós, A ;
Sexty, D ;
Szép, Z .
PHYSICAL REVIEW D, 2001, 64 (12)
[6]   Baryon fluctuations and the QCD phase transition [J].
Bower, D ;
Gavin, S .
PHYSICAL REVIEW C, 2001, 64 (05) :5
[7]  
Fetter A. L., 1971, QUANTUM THEORY MANY
[8]   Lattice determination of the critical point of QCD at finite T and μ -: art. no. 014 [J].
Fodor, Z ;
Katz, SD .
JOURNAL OF HIGH ENERGY PHYSICS, 2002, (03) :217-226
[9]  
FUJII H, UNPUB
[10]   Spectral functions in the σ channel near the critical end point -: art. no. 025203 [J].
Fukushima, K .
PHYSICAL REVIEW C, 2003, 67 (02) :252031-2520310
1234