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A new resonance in K+Lambda electroproduction: the D_{13}(1895) and its electromagnetic form factors

C. Bennhold·H. Haberzettl·T. Mart
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Abstract

New SAPHIR p(gamma,K+)Lambda total cross section data show a resonance structure at a total c.m. energy around 1900 MeV. We investigate this feature with an isobar model and find that the structure can be well explained by including a new D_{13} resonance at 1895 MeV. Such a state has been predicted by a relativistic quark model at 1960 MeV with significant gamma-N and K-Lambda branching ratios. We demonstrate how the measurement of single and double polarization observables can be used to obtain additional information on this resonance. Using recent (e,e'K+) JLab data from Hall C we extract the electromagnetic form factors of this state.

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C. Bennhold, H. Haberzettl, T. Mart. 1999-09-10. A new resonance in K+Lambda electroproduction: the D_{13}(1895) and its electromagnetic form factors. https://arxiv.org/abs/nucl-th/9909022

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