Inclusive $\pi^+$ to $\pi^-$ Ratios and Quark Distributions of Pions and Nucleons

Eisenberg, Y. ; Haber, B. ; Hochman, D. ; et al.
Phys.Lett.B 83 (1979) 127, 1979.
Inspire Record 131271 DOI 10.17182/hepdata.27334

The ratio R of inclusive π + π − production at low transverse momenta is measured in π + n and pn interactions at 195 GeV/ c . R ( 1 R ) in the proton (neutron) fragmentation region increases with Feynman- x and is smaller than R from π + fragmentation. The results agree with a quark-quark scattering model originally proposed for “hard” processes and disagree with a modified version of the model which includes gluon scattering.

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