Large-angle inclusive production of charged pions at the CERN ISR with transverse moment a less than 1.0 GeV/c

Abstract The inclusive production of π ± in proton-proton collisons has been measured for the transverse momentum range 0.15 to 1.0 GeV/ c over an angular range of 29° to 89° in the centre-of-mass system and for centre-of-mass energies √ s = 30.6 and 52.8 GeV. For each energy the invariant cross-section foe fixed transverse momentum was found to increase by about 15% as the centre-of-mass rapidity decreases from 1 to 0, i.e. the “central plateau” has not yet been reached.