photoproduction with coupled-channel effects

Ryu, Hui-Young (Korea Institute of Science and Technology Information (KISTI) 245, Daejeon 305-806, Korea) (Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan) ; Titov, Alexander I. (Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan) (Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980, Russia) ; Hosaka, Atsushi (Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980, Russia) ; Kim, Hyun-Chul (Department of Physics, Inha University, Incheon 402-751, Republic of Korea) (School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Republic of Korea)

03 February 2014

Abstract: We study photoproduction with various hadronic rescattering contributions included, in addition to the Pomeron and pseudoscalar meson-exchange diagrams. We find that the hadronic rescattering diagrams can explain the recent experimental data in the vicinity of the threshold. In particular, the bump-like structure at the photon energy GeV is well explained by the rescattering amplitude in the intermediate state, which is the dominant contribution among other hadronic contributions. We also find that the hadronic rescattering diagrams are consistent with the observed spin-density matrix elements near the threshold region.


Published in: PTEP 2014 (2014) 023D03
Published by: Oxford University Press/Physical Society of Japan
DOI: 10.1093/ptep/ptu004
arXiv: 1212.6075
License: CC-BY-3.0



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