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

International audienceTwo-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 ($\mathrm {K_S}^{0}$) 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 $\mathrm {K_S}^{0}$ 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