TY  - JOUR
AU  - Ramos, A.
AU  - Oset, E.
PY  - 2013
DA  - 2013//
TI  - The role of vector-baryon channels and resonances in the gamma p -> K-0 Sigma(+) and gamma n -> K-0 Sigma(0) reactions near the K*Lambda threshold
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 287
EP  - 292
VL  - 727
IS  - 1-3
PB  - Elsevier Science Bv
AB  - We have studied the gamma p -> K-0 Sigma(+) reaction in the energy region around the K*Lambda and K*Sigma thresholds, where the CBELSA/TAPS cross section shows a sudden drop and the differential cross section experiences a transition from a forward-peaked distribution to a flat one. Our coupled-channel model incorporates the dynamics of the vector meson-baryon interaction which is obtained from the hidden gauge formalism. We find that the cross section in this energy region results from a delicate interference between amplitudes having K*Lambda and K*Sigma intermediate states. The sharp downfall is dictated 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 results for the complementary gamma n -> K-0 Sigma(0) reaction, the measurement of which would test the mechanism proposed in this work.
SN  - 0370-2693
UR  - http://arxiv.org/abs/1304.7975
UR  - https://doi.org/10.1016/j.physletb.2013.10.012
DO  - 10.1016/j.physletb.2013.10.012
LA  - English
N1  - WOS:000328518400041
ID  - Ramos+Oset2013
ER  -