Large N gauge theories -- Numerical results(4)

Some physical results in four dimensional large N gauge theories on a periodic torus are summarized.

4

4.PionsinlargeNQCD

SincechiralsymmetryisbrokeninlargeNQCDevenin nitevolume,oneshouldbeabletoobservemasslesspionsin nitevolume.Thisresultemergesinthefollowingmanner9.Propertiesofasinglequarkinaback-groundgauge eldAµ(x)cannotdependonashiftofAµ(x)→Aµ(x)+p

µ

otherseesAµ(x)→Aµ(x)

pµ

2l

andthe