K_s^0 and Lambda^0 Production Studies in pbar-p Collisions at sqrt(s)=1800 and 630 GeV

TL;DR

This study analyzes K_s^0 and Lambda^0 particle production in proton-antiproton collisions at two energies, revealing detailed transverse momentum distributions and their dependence on event multiplicity, with results extending to higher p_T than previous measurements.

Contribution

It provides new measurements of K_s^0 and Lambda^0 production at 1800 and 630 GeV, including high p_T data and multiplicity dependence, enhancing understanding of particle production mechanisms.

Findings

p_T distributions extend above 8 GeV/c

<p_T> higher than previous measurements

mean p_T depends on charged particle multiplicity

Abstract

We present a study of the production of K_s^0 and Lambda^0 in inelastic pbar-p collisions at sqrt(s)= 1800 and 630 GeV using data collected by the CDF experiment at the Fermilab Tevatron. Analyses of K_s^0 and Lambda^0 multiplicity and transverse momentum distributions, as well as of the dependencies of the average number and <p_T> of K_s^0 and Lambda^0 on charged particle multiplicity are reported. Systematic comparisons are performed for the full sample of inelastic collisions, and for the low and high momentum transfer subsamples, at the two energies. The p_T distributions extend above 8 GeV/c, showing a <p_T> higher than previous measurements. The dependence of the mean K_s^0(Lambda^0) p_T on the charged particle multiplicity for the three samples shows a behavior analogous to that of charged primary tracks.