Measurements of hadron production in 90 GeV/c proton-carbon interactions

Abstract

This paper presents the multiplicity of neutral and charged hadrons produced in 90 GeV$/c$ proton-carbon interactions from a dataset taken by the NA61/SHINE experiment in 2017. Particle identification via dE/dx was performed for the charged hadrons ${\pi }^{\pm }$, $K^{\pm }$, and $p/\bar{p}$; the neutral hadrons $K_S^0$, $\Lambda$, and $\bar{\Lambda }$ were identified via an invariant mass analysis of their decays to charged hadrons. Double-differential multiplicity results as a function of laboratory momentum and polar angle are presented for each particle species; these results provide vital constraints on the predicted neutrino beam flux for current and future long-baseline neutrino oscillation experiments.

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