HAL : in2p3-00185061, version 1
 arXiv : nucl-ex/0701036
 Physical Review C 75 (2007) 042201(R)
 Cross Sections for the $\gamma p \to K^{*0}\Sigma^+$ Reaction at $E_\gamma = 1.7 - 3.0$ GeV
 CLAS Collaboration(s)
 (2007)
 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.
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 Lien vers le texte intégral : http://fr.arXiv.org/abs/nucl-ex/0701036
 in2p3-00185061, version 1 http://hal.in2p3.fr/in2p3-00185061 oai:hal.in2p3.fr:in2p3-00185061 Contributeur : Suzanne Robert <> Soumis le : Lundi 5 Novembre 2007, 11:21:09 Dernière modification le : Mardi 6 Novembre 2007, 08:59:33