Renormalization flow of bound states
Abstract
A renormalization group flow equation with a scaledependent transformation of field variables gives a unified description of fundamental and composite degrees of freedom. In the context of the effective average action, we study the renormalization flow of scalar bound states which are formed out of fundamental fermions. We use the gauged NambuJonaLasinio model at weak gauge coupling as an example. Thereby, the notions of a bound state or fundamental particle become scale dependent, being classified by the fixedpoint structure of the flow of effective couplings.
 Publication:

Physical Review D
 Pub Date:
 March 2002
 DOI:
 10.1103/PhysRevD.65.065001
 arXiv:
 arXiv:hepth/0107221
 Bibcode:
 2002PhRvD..65f5001G
 Keywords:

 11.10.Hi;
 Renormalization group evolution of parameters;
 High Energy Physics  Theory;
 High Energy Physics  Phenomenology
 EPrint:
 25 pages, 3 figures, v2: minor corrections, version to appear in PRD