Abstract
We analyze coherent photoproduction in the interaction near the threshold. We demonstrate that the effect of the coherent production becomes manifest in a comparison of the invariant mass distribution when the system is on the mass. Our model calculations indicate a sizable contribution of resonant and nonresonant background processes in the reaction that generally exceeds the contribution of the coherent resonance channel. However, we find that coherent photoproduction is enhanced relative to the background processes in the forward hemisphere of pair photoproduction. Moreover, the coherence effect does not depend on the photoproduction amplitude and is defined by the probabilities of photoproduction and the transition. Therefore, this effect may be used as an independent method for studying the production mechanism and properties of .
15 More- Received 23 June 2005
- Publisher error corrected 19 October 2005
DOI:https://doi.org/10.1103/PhysRevC.72.035206
©2005 American Physical Society
Corrections
19 October 2005