VARIATIONAL APPROACH TO THE QCD WAVE FUNCTIONAL - DYNAMICAL MASS GENERATION AND CONFINEMENT

被引：63
|
作者：
KOGAN, II
KOVNER, A
机构：
[1] PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544
[2] LOS ALAMOS NATL LAB,DIV THEORY,LOS ALAMOS,NM 87545
来源：
PHYSICAL REVIEW D | 1995年 / 52卷 / 06期
关键词：
D O I：
10.1103/PhysRevD.52.3719
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We perform a variational calculation in the SU(N) Yang-Mills theory in 3 + 1 dimensions. Our trial variational states are explicitly gauge invariant, and reduce to simple Gaussian states in the sere coupling limit. Our main result is that the energy is minimized for the value of the variational parameter away from the perturbative value. The best variational state is therefore characterised by a dynamically generated mass scale M. This scale is related to the perturbative scale Lambda(QCD) by the relation alpha(QCD)(M) = (pi/4N). Taking the one-loop QCD beta function and Lambda(QCD) = 150 MeV we find (for N = 3) the vacuum condensate (alpha/pi)[F-2] = 0.008 GeV4.
引用
收藏
页码：3719 / 3734
页数：16
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