Two-dimensional Yang-Mills theory in the leading 1/N expansion revisited

被引:6
|
作者
Bassetto, A
Nardelli, G
Shuvaev, A
机构
[1] IST NAZL FIS NUCL, PADUA, ITALY
[2] UNIV TRENT, DIPARTIMENTO FIS, I-38050 POVO, TRENTO, ITALY
[3] IST NAZL FIS NUCL, GRP COLLEGATO TRENTO, I-38050 Trento, ITALY
[4] LENINGRAD NUCL PHYS INST, THEORY DEPT, GATCHINA 188350, ST PETERSBURG, RUSSIA
关键词
two-dimensional QCD; large-N QCD; bound state equation;
D O I
10.1016/S0550-3213(97)00207-1
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We obtain a formal solution of an integral equation for <q(q)over bar> bound states, depending on a parameter eta which interpolates between 't Hooft's (eta = 0) and Wu's (eta = 1) equations. We also get an explicit approximate expression for its spectrum for a particular value of the ratio of the coupling constant to the quark mass. The spectrum turns out to be in qualitative agreement with 't Hooft's as long as eta not equal 1. In the limit eta = 1 (Wu's case) the entire spectrum collapses to zero, in particular no rising Regge trajectories are found. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:451 / 460
页数:10
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