FeynmanDiagram Models of Fermion Daughter Regge Trajectories
Abstract
Some Feynmandiagram models of Regge poles are used to study daughter trajectories of fermions in backward pionnucleon scattering. Both the simple model with bare propagators and a generalized model that includes propagator selfenergy insertions are considered. It is found that, in the simple model, the first daughter is a fixed (as a function of the squared momentum transfer u) double pole in the complex J plane. When selfenergy corrections to the propagator are included, the fixed double pole breaks up into a moving daughter trajectory and a moving companion trajectory. It is found that away from u=0, the daughter and companion trajectories get mixed up in a complicated and modeldependent manner.
 Publication:

Physical Review D
 Pub Date:
 October 1970
 DOI:
 10.1103/PhysRevD.2.1596
 Bibcode:
 1970PhRvD...2.1596S