Determination Of The Pion And Kaon Structure Functions

Quark structure functions have been extracted from low-${p}_{T}$ inclusive hadron production data for the pion and kaon with use of the recombination model. ${n}^{\ensuremath{\pi}}=1.0\ifmmode\pm\else\textpm\fi{}0.1$ and ${n}^{K}=2.5\ifmmode\pm\else\textpm\fi{}0.6$ is obtained, where $n$ is the leading ($1\ensuremath{-}x$) power of the nonstrange-valence-quark distribution. Both the pion and kaon nonstrange-sea-quark functions have $n\ensuremath{\simeq}3.5$.