Cross Sections for the $γp \to K^{*0}Σ^+$ Reaction at $E_γ= 1.7 - 3.0$ GeV

Details Cross Sections for the $γp \to K^{*0}Σ^+$ Reaction at $E_γ= 1.7 - 3.0$ GeV Cross Sections for the $γp \to K^{*0}Σ^+$ Reaction at $E_γ= 1.7 - 3.0$ GeV

2007-01-22

arxiv.org/abs/nucl-ex/0701036v3

Phys.Rev.C75:042201,2007; Erratum-ibid.C76:039905,2007

Physics

Nuclear Physics

Nuclear Experiment

7 pages, 5 figures, submitted to Phys. Rev. C (Rapid Commun.)

Scientific paper

10.1103/PhysRevC.75.042201

Differential cross sections for the reaction $\gamma p \to K^{*0} \Sigma^+$ are presented at nine bins in photon energy in the range from 1.7 to 3.0 GeV. The \kstar was detected by its decay products, $K^+\pi^-$, in the CLAS detector at Jefferson Lab. These data are the first \kstar photoproduction cross sections ever published over a broad range of angles. Comparison with a theoretical model based on the vector and tensor $K^*$-quark couplings shows good agreement with the data in general, after adjusting the model's two parameters in a fit to our data. Disagreement between the data at forward angles and the global angle-energy fit to the model suggests that the role of scalar $\kappa$ meson exchange in $t$-channel diagrams should be investigated.

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