title: Exact scale invariance of composite-field coupling constants.
abstract: We show that the coupling-constant of a quantum-induced composite field is scale invariant due to its compositeness condition. It is first demonstrated in next-to-leading order in 1/N in typical models, and then we argue that it holds exactly.
authors.affiliation: Department of Physics, Saitama Medical College, Saitama, 350-0496, Japan.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Akama
authors.forename: Takashi
authors.initials: T
authors.lastname: Hattori