Speaker
Description
We present an analysis to extract kaon parton distribution functions (PDFs) using meson-induced Drell-Yan and quarkonium production data. Starting from the statistical model, first developed for describing the partonic structure of nucleons and later applied to the pion, we have extended this approach to perform a global fit to existing kaon-induced Drell-Yan and charmonium production data. These data are well described by the statistical model, allowing an extraction of the kaon PDFs. We find that both the Drell-Yan and the charmonium data favor a harder valence distribution for strange quark than for up quark in kaon. The kaon gluon distribution is further constrained by the charmonium production data. In particular, the momentum fraction carried by gluons is found to be similar for pion and kaon.
