Publications [#246110] of Haiyan Gao

Papers Published

1. al, HGWNE, Nuclear transparency and effective kaon-nucleon cross section from the $A(e,e' K^+$) reaction, Phys. Rev. C, vol. 84 no. 1 (2011), pp. 015210, American Physical Society (APS), ISSN 0556-2813 [doi]
   (last updated on 2026/01/14)

   Abstract:
   We have determined the transparency of the nuclear medium to kaons from A(e,e′K+) measurements on C12, Cu63, and Au197 targets. The measurements were performed at the Jefferson Laboratory and span a range in four-momentum-transfer squared Q2=1.1-3.0GeV2. The nuclear transparency was defined as the ratio of measured kaon electroproduction cross sections with respect to deuterium (σA/σD). We further extracted the atomic number (A) dependence of the transparency as parametrized by T=(A/2)α-1 and, within a simple model assumption, the in-medium effective kaon-nucleon cross sections. The effective cross sections extracted from the electroproduction data were found to be smaller than the free cross sections determined from kaon-nucleon scattering experiments, and the parameter α was found to be significantly larger than those obtained from kaon-nucleus scattering. We have included similar comparisons between pion- and proton-nucleon effective cross sections as determined from electron-scattering experiments and pion-nucleus and proton-nucleus scattering data. © 2011 American Physical Society.