Evidence for the Onset of Semi-inclusive Scaling in Proton-Proton Collisions in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>5</mml:mn><mml:mn>0</mml:mn><mml:mo>−</mml:mo><mml:mn>3</mml:mn><mml:mn>0</mml:mn><mml:mn>0</mml:mn><mml:mo>−</mml:mo><mml:mfrac><mml:mrow><mml:mi mathvariant="normal">GeV</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:mfrac></mml:math>Momentum Range

Evidence is presented to support the onset, in the $50\ensuremath{-}300\ensuremath{-}\frac{\mathrm{GeV}}{c}$ region of incident momentum, of the asymptotic prediction of Koba, Nielsen, and Olesen regarding the scaling behavior of the charged-prong multiplicity distribution in proton-proton collisions. Lower-energy data, typified by data at $19\frac{\mathrm{GeV}}{c}$, are found not to demonstrate this limiting behavior.

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