A NONLOCAL, COVARIANT GENERALIZATION OF THE NJL MODEL

被引:149
作者
BOWLER, RD
BIRSE, MC
机构
[1] Theoretical Physics Group, Department of Physics and Astronomy, The University of Manchester, Manchester
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1016/0375-9474(94)00481-2
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
We solve a nonlocal generalisation of the NJL model in the Hartree approximation. This model has a separable interaction, as suggested by instanton models of the QCD vacuum. The choice of form factor in this interaction is motivated by the confining nature of the vacuum. A conserved axial current is constructed in the chiral limit of the model and the pion properties are shown to satisfy the Gell-Mann-Oakes-Renner relation. For reasonable values of the parameters the model exhibits quark confinement.
引用
收藏
页码:655 / 664
页数:10
相关论文
共 34 条
  • [1] BALL RD, 1993, T93138 SACL PREPR
  • [2] BALL RD, 1993, IN PRESS P C MANY BO
  • [3] NAMBU-JONA-LASINIO-LIKE MODELS AND THE LOW-ENERGY EFFECTIVE ACTION OF QCD
    BIJNENS, J
    BRUNO, C
    DERAFAEL, E
    [J]. NUCLEAR PHYSICS B, 1993, 390 (02) : 501 - 541
  • [4] BIJNENS J, 1994, NORDITA9427 PREPR
  • [5] CURRENTS AND WARD-TAKAHASHI IDENTITIES FOR NONLOCAL QUANTUM-FIELD THEORIES
    BOS, JW
    KOCH, JH
    NAUS, HWL
    [J]. PHYSICAL REVIEW C, 1991, 44 (01): : 485 - 490
  • [6] MESON MASSES IN A CHIRALLY SYMMETRICAL, COVARIANT EFFECTIVE QUARK-MODEL WITHOUT FREE QUARKS
    BUBALLA, M
    KREWALD, S
    [J]. PHYSICS LETTERS B, 1992, 294 (01) : 19 - 22
  • [7] A CHIRAL THEORY OF NUCLEONS
    DIAKONOV, DI
    PETROV, VY
    POBYLITSA, PV
    [J]. NUCLEAR PHYSICS B, 1988, 306 (04) : 809 - 848
  • [8] A THEORY OF LIGHT QUARKS IN THE INSTANTON VACUUM
    DYAKONOV, DI
    PETROV, VY
    [J]. NUCLEAR PHYSICS B, 1986, 272 (02) : 457 - 489
  • [9] DYAKONOV DI, 1985, ZH EKSP TEOR FIZ, V62, P204
  • [10] DYAKONOV DI, 1985, ZH EKSP TEOR FIZ, V62, P431