Experimental study of low-p/sub t/ hadron fragmentation

We present high-statistics results on the reactions a + p ..-->.. c + X where a and c can be any of ..pi../sup +/, K/sup + -/, p, or p-bar. The data were taken at 100 and 175 GeV/c incident momenta using the Fermilab Single-Arm Spectrometer operated over the kinematic range 0.2 < x < 1.0 and p/sub t/ < or = 1.0 GeV/c. Investigating the x dependence of the data, we find agreement with a quark-parton picture, namely the cross sections have a power-law behavior in 1 - x independent of p/sub beam/ and p/sub t/.