Inclusive Hadron Production in e^{+}e^{-} Annihilation at 〈s〉=53 GeV^{2}

We report on inclusive hadron production in e+e- annihilation at 〈s〉=53 GeV2, using a small solid-angle magnetic spectrometer with good particle identification at 90° to the beams at SPEAR II. The cross sections of π± and K± when compared with data at s=23 GeV2 exhibit scaling in (s/β)dσ/dx with x=2E/s1/2. The invariant cross section depends on the momentum as p-4.