K${}_{\mathrm{S}}^0$- and (anti-)$\Lambda$-hadron correlations in pp collisions at $\sqrt{s}=13$ TeV

Abstract

Two-particle azimuthal correlations are measured with the ALICE apparatus in pp collisions at $\sqrt{s}=13$ TeV to explore strangeness- and multiplicity-related effects in the fragmentation of jets and the transition regime between bulk and hard production, probed with the condition that a strange meson (K${}_{\mathrm{S}}^0$) or baryon ($\Lambda$) with transverse momentum $p_{\mathrm{T}}>3$ GeV/c is produced. Azimuthal correlations between kaons or $\Lambda$ hyperons with other hadrons are presented at midrapidity for a broad range of the trigger ($3<p_{\mathrm{T}}^{\mathrm{trigg}}<20$ GeV/$c$) and associated particle $p_{\mathrm{T}}$ (1 GeV/$c$ $<p_{\mathrm{T}}^{\mathrm{assoc}}<p_{\mathrm{T}}^{\mathrm{trigg}}$), for minimum-bias events and as a function of the event multiplicity. The near- and away-side peak yields are compared for the case of either K${}_{\mathrm{S}}^0$ or $\Lambda$($\overline{\Lambda }$) being the trigger particle with that of inclusive hadrons (a sample dominated by pions). In addition, the measurements are compared with predictions from PYTHIA 8 and EPOS LHC event generators.

25 pages, 10 captioned figures, 2 tables, authors from page 20, published version, figures at http://alice-publications.web.cern.ch/node/7263

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Cited by in corpus (4)

• Event Generators for High-Energy Physics Experiments
• Underlying-event studies with strange hadrons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Jet-like correlations with respect to K${}_{\mathrm{S}}^0$ and $\Lambda$ ($\bar{\Lambda }$) in pp and central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Investigating $\Lambda$ baryon production in p-Pb collisions in jets and the underlying event using angular correlations