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Forward-angle<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mi>Λ</mml:mi></mml:mrow></mml:math>photoproduction in a Regge-plus-resonance approach
We present an effective-Lagrangian description for forward-angle ${K}^{+}\ensuremath{\Lambda}$ photoproduction from the proton, valid for photon lab energies from threshold up to $16\phantom{\rule{0.3em}{0ex}}\mathrm{GeV}$. The high-energy part of the amplitude is modeled in terms of t-channel Regge-trajectory exchange. The sensitivity of the calculated observables to the Regge-trajectory phase is investigated in detail. …