Measurements of hadron production in $\pi^{+}$ + C and $\pi^{+}$ + Be interactions at 60 GeV/$c$

TL;DR

This paper reports precise measurements of hadron production rates from 60 GeV/$c$ $^+$ interactions with carbon and beryllium, aiding neutrino flux predictions for long-baseline experiments.

Contribution

It provides new differential production multiplicities and cross sections for various hadrons from ^+ interactions with C and Be at 60 GeV/$c$, improving neutrino flux modeling.

Findings

Measured integrated production and inelastic cross sections for ^+ + C and Be.

Determined differential multiplicities of $K^0_{S}$, $mbda$, anti-$mbda$, $^+$, $^-$, $K^+$, $K^-$, and protons.

Abstract

Precise knowledge of hadron production rates in the generation of neutrino beams is necessary for accelerator-based neutrino experiments to achieve their physics goals. NA61/SHINE, a large-acceptance hadron spectrometer, has recorded hadron+nucleus interactions relevant to ongoing and future long-baseline neutrino experiments at Fermi National Accelerator Laboratory. This paper presents three analyses of interactions of 60 GeV/$c$ $\pi^+$ with thin, fixed carbon and beryllium targets. Integrated production and inelastic cross sections were measured for both of these reactions. In an analysis of strange, neutral hadron production, differential production multiplicities of $K^0_{S}$, $\Lambda$ and anti-$\Lambda$ were measured. Lastly, in an analysis of charged hadron production, differential production multiplicities of $\pi^+$, $\pi^-$, $K^+$, $K^-$ and protons were measured. These measurements will enable long-baseline neutrino experiments to better constrain predictions of their neutrino flux in order to achieve better precision on their neutrino cross section and oscillation measurements.