Abstract
A two-component duality framework for electroproduction is proposed in which the resonance contributionW R toνW 2 is dual to the tensor Regge trajectories (f0, A2) and the background contributionW B is dual to the sum of the pomeron trajectory and a suitably defined fixed (J=0) pole extrapolation. The framework is seen to be consistent with the SLAC data and with resonance models. Consistency with locality (causality) is implemented by the use of the locality sum rules which we have recently derived and which are in very good agreement with experiment. Locality, with some other assumptions, is shown to imply a universal fall-off rate (−q 2)−d for excitation form factors and the connection2d=p+1 with the threshold behavior (1−ω) p of the scaling functionF 2 (ω). It is argued thatW R is not local, so that neither isW B . Fixed-pole extrapolations consistent with these restrictions are exhibited.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
