11th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

Two-particle jet-like angular correlations with identified strange hadrons allow the measurements of both jet and non-jet components of strange particle production, and in this way to investigate the extent to which the strangeness enhancement observed in small collision systems is a result of soft (medium-like) or hard (jet-like) processes. Relative contributions of these processes to strangeness production mechanisms can be probed by examining changes in the strange hadron over non-strange hadron ratios within jets and in the underlying event separately. In addition, changes to the jet hadrochemistry are studied by measuring strangeness production in the away-side jet.

In this talk, we present the first measurements of the $\varphi$/h, $(\mathrm{\Lambda }+\bar{\mathrm{\Lambda }})$/h and ${\mathrm{K}}_{\mathrm{S}}^0$/(${\pi }^{+}+{\pi }^{-}$), $(\mathrm{\Lambda }+\bar{\mathrm{\Lambda }})$/(${\pi }^{+}+{\pi }^{-}$) ratios in jets and underlying event as a function of charged-particle multiplicity using jet-like di-hadron angular correlations in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$= 5.02 TeV and pp collisions at $\sqrt{s}$= 13 TeV measured with ALICE. The results suggest that the strangeness enhancement originates in the underlying event.