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The contributions of the resonances $D_{13}(1520)$, $S_{11}(1535)$,$S_{11}(1650)$, $D_{15}(1675)$, $F_{15}(1680)$, $D_{13}(1700)$, $P_{11}(1710)$,$P_{13}(1720)$ to $\gamma p\to \eta p$ are found from the data on crosssections, beam and target asymmetries using two approaches: fixed-t dispersionrelations and an isobar model. Utilization of the two approaches and comparisonof the results obtained with different parametrizations of the resonancecontributions allowed us to make conclusions about the model-dependence ofthese contributions. We conclude that the results for the contributions of theresonances $D_{13}(1520)$, $S_{11}(1535)$, $F_{15}(1680)$ to correspondingmultipole amplitudes are stable. With this the results for $D_{13}(1520)$ and$F_{15}(1680)$, combined with their PDG photoexcitation helicity amplitudes,allowed us to find the branching ratios $Br (D_{13}(1520)\to \eta N)=0.05\pm0.02%$, $Br (F_{15}(1680)\to \eta N)=0.16\pm0.04%$ which have significantlybetter accuracy than the PDG data. The total Breit-Wigner width of the$S_{11}(1535)$ is model-dependent, we have obtained $\Gamma (S_{11}(1520))=142MeV$ and $195 MeV$ using dispersion relations and the isobar model,respectively. The results for the $S_{11}(1650)$, $D_{15}(1675)$,$P_{11}(1710)$, $P_{13}(1720)$ are model dependent, only the signs and ordersof magnitude of their contributions to multipole amplitudes are determined. Theresults for the $D_{13}(1700)$ are strongly model-dependent.Comment: 26 pages, 6 figure

physical review. c. nuclear physics/physical review. c, nuclear physics

Resonance contributions to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>η</mml:mi></mml:mrow></mml:math>photoproduction on protons found using dispersion relations and an isobar model

Resonance contributions toηphotoproduction on protons found using dispersion relations and an isobar model