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The production of $\eta'$ mesons in the reactions $\gamma p\to p\eta'$ and$pp\to pp\eta'$ is described consistently within a relativistic meson exchangemodel of hadronic interactions. The photoproduction can be described quite wellover the entire energy range of available data by considering an $S_{11}$ and a$P_{11}$ resonance, in addition to the $t$-channel mesonic current. Theobserved angular distribution is due to the interference between the$t$-channel and the nucleon resonance $s$- and $u$-channel contributions. Ouranalysis yields positions close to 1650 MeV and 1870 MeV for the $S_{11}$ and$P_{11}$ resonances, respectively. We argue that, at present, identifying thesestates with the known $S_{11}(1650)$ resonance and the missing $P_{11}$resonance predicted at 1880 MeV, respectively, would be premature. It is foundthat the nucleonic current is relatively small and that the $NN\eta^\prime$coupling constant cannot be much larger than $g_{NN\eta^\prime}=3$. As for the$p p \to p p \eta^\prime$ reaction, different current contributions areconstrained by a combined analysis of this and the photoproduction reaction.Difficulties to simultaneously account for the 47-MeV and 144-MeV angulardistributions measured by the COSY-11 and DISTO collaborations, respectively,are addressed.Comment: minor revision, scheduled to a appear in Phys. Rev. C 69 (May 2004),  revtex, 17 pages, 10 figures, 3 table

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

Consistent analysis of the reactions<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>γ</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi>p</mml:mi><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>p</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi>p</mml:mi><mml:mi>p</mml:mi><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml…

Consistent analysis of the reactionsγp→pη′andpp→ppη′