$\Lambda$ and $K^0_s$ Production in pC Collisions at 10 Gev/c

TL;DR

This study measures the production cross sections of $\Lambda$ and $K^0_s$ particles in proton-carbon collisions at 10 GeV/c, revealing higher $\Lambda/\pi^+$ ratios than in proton-proton interactions and comparing experimental results with models.

Contribution

First measurement of $\Lambda$ and $K^0_s$ production cross sections in pC collisions at 10 GeV/c with comparison to models and other nuclear interactions.

Findings

$\Lambda$ production cross section: 13.3±1.7 mb.

$\K^0_s$ production cross section: 3.8±0.6 mb.

$\Lambda/\pi^+$ ratio is about twice that in pp reactions.

Abstract

The experimental data from the 2m propane bubble chamber have been analyzed for pC$\to \Lambda(K^0_s)X$ reactions at 10 GeV/c. The estimation of experimental inclusive cross sections for $\Lambda$ and $K^0_s$ production in the p$^{12}C$ collision is equal to $\sigma_{\Lambda}$= 13.3$\pm$1.7 mb and $\sigma_{K^0_s}$= 3.8$\pm$0.6 mb, respectively. The measured $\Lambda /\pi^+$ ratio from pC reaction is equal to (5.3$\pm0.8)*10^{-2}$. The experimental $\Lambda /\pi^+$ ratio in the pC reaction is approximately two times larger than the $\Lambda /\pi^+$ ratio from pp reactions or from simulated pC reactions by FRITIOF model for the same energy. The $\Lambda /\pi^+$ ratio in interaction C+C at momentum 10 Gev/c is four times larger than the $\Lambda/\pi^+$ ratio from p+p reactions at the same energy.