Jun 10 – 14, 2019
Bonn, Campus Poppelsdorf
Europe/Zurich timezone

EtaMAID-2019 for η and η' photoproduction on nucleons

Jun 11, 2019, 3:30 PM
HS 7

HS 7

Partial wave analyses and baryon resonance parameter extraction Parallel Session A


Victor Kashevarov (Institut für Kernphysik, Mainz)


Results of the phenomenological analysis of $\eta$ and $\eta'$
photoproduction on the protons and the neutrons with updated version of
EtaMAID model are presented.The model includes 23 nucleon resonances parameterized with Breit-Wigner shapes, $t$-channel exchange of vector and axial-vector mesons with Regge cuts,and Born terms in $s$ and $u$ channels.
A new approach is discussed to avoid double counting in the overlap region of Regge and resonances. Parameters of the resonances were obtained from a fit to available experimental data. The model well describes both differential cross sections and polarization observables for photoproduction of $\eta$ and $\eta'$ on the nucleons at photon beam energies from the threshold up to 9 GeV.
A comparison is done among four newly updated partial waves analyses for
observables and partial waves. The nature of the most interesting specifics in the data is discussed.

Primary author

Victor Kashevarov (Institut für Kernphysik, Mainz)

Presentation materials