6533b86ffe1ef96bd12cdcef

RESEARCH PRODUCT

Vector meson-baryon dynamics in photoproduction reactions around 2 GeV

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We investigate the role of vector mesons and coupled-channel unitarization on photoproduction reactions off the proton at energies around 2 GeV. We explain the sudden drop on the γp → K 0 Σ + cross section, observed recently by the CBELSA/TAPS collaboration, by a delicate interference between amplitudes having K ∗ Λ and K ∗ Σ in- termediate states modulated by the presence of a nearby N ∗ resonance produced by our model, a feature that we have employed to predict its properties. We also show the impor- tance of coupled-channel unitarization in the γp → K ∗ 0 Σ + reaction, measured recently by CBELSA/TAPS and CLAS with conflicting results.