arXiv:hep-ph/0401180·v4·High Energy Physics — Phenomenology
How to measure the Pomeron phase in diffractive dipion photoproduction
I. F. Ginzburg (1) · I. P. Ivanov (1 and 2) · ((1) Sobolev Institute of Mathematics, Novosibirsk, Russia, (2) INFN, Cosenza, Italy)
Abstract
The study of charge asymmetry of pions in the high-energy process gamma p -> pi+ pi- p (e p -> e pi+ pi- p) at very small dipion momenta offers a method to measure the phase of the forward hadronic (quasi)elastic amplitude gamma p -> rho p. We estimate potential of such measurements at HERA.
Comments: 12 pages, 2 figures; v4: more elaborate parametrizations of dipion spectra implemented, discussion extended