Strangeness production in jets from p+p \sqrt{s} = 200 GeV collisions

TL;DR

This paper investigates strangeness production in jets from proton-proton collisions at 200 GeV to understand QCD fragmentation mechanisms and establish baselines for heavy-ion studies, using experimental data and model comparisons.

Contribution

It provides new measurements of strange particle production in jets, compares different jet algorithms and models, and explores methods to distinguish quark and gluon jets based on strange particle tagging.

Findings

Strange particle ratios in jets are quantified and compared to inclusive spectra.

Jet tagging with strange baryons and mesons offers a way to differentiate quark and gluon jets.

Experimental results are compared with various theoretical models.

Abstract

Measurements of strangeness production in jets help illuminate the QCD mechanisms in fragmentation. Furthermore, they provide a crucial baseline for heavy-ion studies where modifications in jet chemistry have recently been predicted. We present new results on strange particle production in jets from p+p \sqrt{s} = 200 GeV collisions measured by the STAR experiment. The momentum distributions of the \Lambda, \bar{\Lambda} and K0Short particles are obtained using various jet finding algorithms, and then compared to various models. Strange particle ratios in jets are obtained and compared to values obtained from the inclusive spectra. Finally, we show jets tagged with leading strange baryons and mesons, in order to investigate whether gluon or quark jets can be isolated in this way.