Photoproduction of K^0 and Lambda at HERA and a Comparison with Deep Inelastic Scattering

Abstract

Inclusive $K^0$ and $\Lambda$ photoproduction has been investigated at HERA with the H1 detector at an average photon-proton center of mass energy of 200 GeV in the transverse momentum range 0.5 <p_t <5 GeV. The production rates as a function of $p_t$ and center of mass rapidity are compared to those obtained in deep inelastic scattering at $\av{Q^2}=23 GeV^2$. A similar comparison is made of the rapidity spectra of charged particles. The rate of strangeness photoproduction is compared with $p\bar{p}$ measurements. The observations are also compared with next-to-leading order QCD calculations and the predictions of a Monte Carlo model.

arXiv comment22 pages, latex, 7 Figures

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