Inclusive ϱ0 production in νp charged-current interactions

Using data from the Fermilab 15 ft hydrogen bubble chamber, we have studied inclusive ?⁰ production in antineutrino-proton charged-current interactions. We measure (0.21 ± 0.03) ?⁰/event, corresponding to ?⁰/π^?=0.12 ± 0.02. As a function of Q² and for hadronic masses above a threshold region, the ?⁰/π^? ratio shows little variation. At least 50% of the ?⁰'s are consistent with coming from the current fragmentation region. The results agree reasonably well with the predictions of the quark fragmentation model of Feynman and field.     

Properties of K0 and Λ inclusive production in charged-current antineutrino-nucleon interactions

In this paper we discuss inclusive spectra of K⁰'s and Λ's produced in charged in charged-current $\text{ν}{}_{\mathrm{\mu }}\text{N}$ interactions in the Fermilab 15 ft bubble chamber filled with a 64% Ne-H₂ mixture. Data presented in terms of the invariant cross section show, when compared with results from experiments with other incident beams, that the behavior of these distributions is approximately the same. The K⁰ and Λ fragmentation functions are presented and the shape of the K⁰ fragmentation function is found to be consistent with the parametrization of Field and Feynman.The average K⁰ and Λ transverse momentum squared as a function of Q², W², x and z is presented. Comparisons for the K⁰'s produced in the current fragmentation region are in qualitative agreement with QCD predictions. The value of the Λ polarization is measured and a positive normal polarization P_N = 0.34±0.18 is found.