K/sup +/ and. pi. /sup +/ momentum spectra from 2. 5--3. 1 GeV/c protons on carbon and two-body final-state spectral peaks from (p, K/sup +/) and (p,. pi. /sup +/) reactions

A partially separated 0.9--1.8 GeV/c K/sup +/ beam at the Bevatron was utilized as a spectrometer (0.9% full width at half-maximum) to study the K/sup +/ and ..pi../sup +/ momentum spectra of 0degree from carbon and other target elements bombarded by 2.5--3.1 GeV/c protons. Searches were made for possible spectral peaks resulting from two-body final state reactions such as /sup 12/C(p, K/sup +/)/sup 13/C/sub Lambda/ and /sup 12/C(p, ..pi../sup +/)/sup 13/C. Spectral peaks observed from p (p, ..pi../sup +/) d assisted in calibrating the apparatus, and a spectral structure attributed to p(p, K/sup +/)(p..lambda..) * was observed, where (p..lambda..) * represents p and ..lambda.. with low relative momentum. No other K/sup +/ or ..pi../sup +/ spectral peaks appeared above background; upper limits are given which this experiment places on (dsigma/d..cap omega..)/sub c.m./ at 0degree. The K/sup +/ and ..pi../sup +/ momentum spectra at 0degree from carbon bombarded by 2.50, 2.70, 2.89, and 3.10 GeV/c protons are also given. (AIP)