Strangeness production in jets in 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 STAR data and various jet algorithms.

Contribution

It provides new measurements of strange particle fragmentation functions and ratios in jets, comparing them to models and exploring methods to distinguish quark and gluon jets.

Findings

Fragmentation functions for Lambda, Bar{Lambda}, and K0Short measured.

Strange particle ratios in jets compared to inclusive spectra.

Jets tagged with strange baryons and mesons to identify jet flavor.

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 observed by the STAR experiment. We present new results on strange particle production in jets from p+p $\sqrt{s}$ = 200 GeV collisions measured by the STAR experiment. The fragmentation functions 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 will be obtained and compared to values obtained from the inclusive spectra. Finally, we will show jets tagged with leading strange baryons and mesons, in order to investigate whether gluon or quark jets can be isolated in this way.