Forward inclusive production spectrum ofKS,Λ0,Λ¯0, andnin the collision of 200-GeV/cπ−,K−,p¯, andpon Be

Abstract

We have measured the forward production spectra of various neutral particles produced by ..pi../sup -/, K/sup -/, p-bar, and p at 200 GeV/c, and by ..pi../sup -/ at 290 GeV/c incident on a Be target. The salient features of these measurements are (1) copious production of K/sup 0//sub S/ at large Feynman x/sub L/ for incident ..pi../sup -/ and K/sup -/, (2) production of roughly equal fluxes of ..lambda../sup 0/ and ..lambda..-bar/sup 0/ for incident ..pi../sup -/, and (3) close similarity of the following spectra: ..pi../sup -/ ..-->.. n and K/sup -/ ..-->.. ..lambda../sup 0/; ..pi../sup -/ ..-->.. ..lambda../sup 0/, ..pi../sup -/ ..-->.. ..lambda..-bar/sup 0/; and p ..-->.. K/sup 0//sub S/; ..pi../sup 0/- ..-->.. K/sub s//sup 0/ and p ..-->.. ..lambda../sup 0/. The overall features of the various distributions seem to agree with the ideas of dimensional counting presented in the constituent-interchange model of quark collisions. Results are presented in terms of the invariant cross section Ed/sup 3/sigma (x/sub L/, P/sub perpendicular/ = 0)/dp/sup 3/ per Be nucleus for each inclusive reaction.