Photoproduction of K+Lambda and K+Sigmaknot from Hydrogen from 5 to 16 GeV
A. Boyarski · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2019
Cross sections for the reactions 3/p-K% and w -K+X' have been measured at four-momentum transfer squared (-t) from 0.005 to 2 GeV2, w. at photon energies 5, 8, 11, and 16 GeV.For -t > 0.2 GeV2 each of the K+ cross sections are about l/3 of the m'n photoproduction cross section, having nearly the same energy and momentum transfer dependence.The K+ cross sections fall off at small 1 t I, however, in contrast to the sharp forward spike seen in n+n; this.leads to a disagreement with an SU(3) prediction for -t < 0.1 GeV2.The ratio of KcXo to K+A cross sections is typically between 0.5 and 1. 0, .