BROKEN SCALE INVARIANCE AND SCALING LAWS IN ELEMENTARY PARTICLE PHYSICS.
California Inst. of Tech., Pasadena, CA (US). W. M. Keck Lab. of Engineering Materials, Curtis G. Callan · 1970
By scale invariance of a theory,.we usually mean .invariance of the physics under changes of t h e scale of energy.In t h e r e a l world, such, a symmetry i s , of course, a t best a broken symmetry, since the masses of the p a r t i c l e s provide a n a t u r a l fixed scale of energy.Many people -most notably ~a s t r u ~, Mack,' and Wilson -have suggested t h a t Fcale