Production of hadrons at large transverse momentum at 200, 300, and 400 GeV

We have measured, as a function of transverse momentum (p/sub perpendicular/), the invariant cross section E dsigma/d3p for the production of π+-, K+-, p, anti p, d, and anti d in proton collisions with a tungsten (W) target at incident proton energies of 200, 300, and 400 GeV. The measurements were made in the region of 90 degrees in the c.m. system of the incident proton and a single nucleon at rest. Measurements were also made with 300-GeV protons incident on Be, Ti, and W targets of equal interaction length. These p--nucleus measurements, which show a strong dependence on atomic number at high p/sub perpendicular/, were used to extract effective proton--nucleon cross sections by extrapolation to atomic number unity. At large values of the scaling variable x/sub perpendicular/ = 2p/sub perpendicular//√s, where s is the square of the c.m. energy, the pion data are found to be well represented by the expression (νs/sup -n/e/sup -ax/sub perpendicular//, with n = 11.0 plus-or-minus 0.4 and a = 36.0 plus-or-minus 0.4. At x/sub perpendicular/ < 0.35, where similar measurements have been made at the CERN Intersecting Storage Rings (ISR), our data are in good agreement with the ISR data