Production of hadrons at large transverse momentum in 200, 300, and 400GeV pp and pnucleus collisions
Abstract
Measurements of the invariant cross section Ed^{3}σd^{3}p are presented for the production of hadrons (π, K, p, and p̄) at large transverse momentum (p_{⊥}) by 200, 300, and 400GeV protons incident on H_{2}, D_{2}, Be, Ti, and W targets. The measurements were made at a laboratory angle of 77 mrad, which corresponds to angles near 90° in the c.m. system of the incident proton and a single nucleon at rest. The range in p_{⊥} for the data is 0.77<=p_{⊥}<=6.91 GeV/c, corresponding to values of the scaling variable x_{⊥}=2p_{⊥}s from 0.06 to 0.64. For pp collisions, the pion cross sections can be represented in the region x_{⊥}>35 by the form (1p_{⊥}^{n})(1x_{⊥})^{b}, with n=8 and b=9. The ratio of π^{+} to π^{} production grows as a function of x_{⊥} to a value larger than 2 at x_{⊥}>~0.5. The ratios of the production of K^{+} and protons to π^{+} and of K^{} and antiprotons to π^{} also scale with x_{⊥} for pp collisions. The K^{+/}, p, and p̄ fitted values for n and b are given. Particle ratios are also presented for D_{2}, Be, Ti, and W targets and the dependences on atomic weight (A) are discussed.
 Publication:

Physical Review D
 Pub Date:
 February 1979
 DOI:
 10.1103/PhysRevD.19.764
 Bibcode:
 1979PhRvD..19..764A