2004/08/10 by A. E. Kudryavtsev, V. E. Tarasov, I. I. Strakovsky +2
Chemistry · Physics and Astronomy · #Chemistry #Crystallography #Energy (signal processing) #High-Energy Particle Collisions Research #Meson #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Resonance (particle physics) #Scattering #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.71.035202
published as Phys.Rev.C71:035202,2005 · 16 pages, 7 figures, submitted to PRC
arxiv created 2004/08/10 · openalex publication_date 2005/03/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We consider the reaction \ensuremathγd\ensuremath→\ensuremathπ0d in a wide energy range around and above the \ensuremathη-meson photoproduction threshold at backward c.m. angles of the outgoing pions. Our theoretical analysis is motivated by the recent measurements of the CLAS Collaboration at Jefferson Lab, where this kinematical region of the reaction has been thoroughly studied for the first time and an enhancement in the energy dependence of the differential cross section in the region of E_\ensuremathγ~600\text\ensuremath-800\phantom\rule0.3em0exMeV has been observed. Our preliminary and qualitative analysis, based on single- and double-scattering diagrams, shows that the observed structure can be explained by the contribution of the double-scattering diagram with intermediate production of the \ensuremathη meson. The effect, to a considerable extent, is due to the contribution of the N(1535) resonance to the amplitudes of subprocesses on the nucleons.