Large-pT π0Production in High-EnergyπpCollisions

It is pointed out that the recently measured difference in $p_T$ spectrum between ${\pi }^{\pm }p\to {\pi }^{0}X$ and $\mathrm{pp}\to {\pi }^{0}X$, with a large-$p_T {\pi }^0$, seems to be a consequence only of the smaller number of quarks per projectile in a pion beam.