Abstract
We have measured, as a function of transverse momentum (), the invariant cross section for the production of , , , , , and 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° 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 -nucleus measurements, which show a strong dependence on atomic number at high , were used to extract effective proton-nucleon cross sections by extrapolation to atomic number unity. At large values of the scaling variable , where is the square of the c.m. energy, the pion data are found to be well represented by the expression , with and . , where similar measurements have been made at the CERN ISR, our data are in good agreement with the ISR data.
- Received 5 December 1974
DOI:https://doi.org/10.1103/PhysRevD.11.3105
©1975 American Physical Society