Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

Study of (multi-)strange particle production in jets and two-particle correlations with high-pT V0 particles in small collision systems with ALICE at the LHC

4 Nov 2019, 17:40

20m

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Small systems Poster Session

Speaker

Pengyao Cui (Central China Normal University CCNU (CN))

Description

Recent ALICE results on the yield of strange particles in pp and p-Pb collisions reveal the possibility that similar strange quark production mechanisms could be present in all collision systems. The $p_{\mathrm{T}}$-dependent baryon-to-meson yield ratio in hadronic and nuclear collisions is sensitive to the collective expansion of the system, the partonic recombination into hadrons, the jet fragmentation and hadronization.

In this work, we explore the connection between (multi-)strange hadron yields enhancement and jet production via the measurement of the $p_{\mathrm{T}}$-differential spectrum of strange and multi-strange particles (${\mathrm{K}}_{\mathrm{S}}^0$, $\mathrm{\Lambda }$, $\bar{\mathrm{\Lambda }}$ and $\mathrm{\Xi }$) within jets and in the underlying event, in pp collisions at $\sqrt{s}=13$ TeV and p-Pb collisions at $\sqrt{s_{\mathrm{N}\mathrm{N}}}=5.02$ TeV, respectively. To gain insight on the fragmentation of jets containing a ${\mathrm{V}}^0$s, an alternative approach that uses two-particle correlation is considered. Both the near-side and away-side components of the correlation functions between the high-momentum ${\mathrm{K}}_{\mathrm{S}}^0$, $\mathrm{\Lambda }$ and $\bar{\mathrm{\Lambda }}$ (${\mathrm{V}}^0$s) and charged hadrons as a function of $p_{\mathrm{T}}$ of the trigger and associated particles as well as the event multiplicity in pp collisions at $\sqrt{s}=13$ TeV will be presented. The comparison of ratios of yields from ${\mathrm{V}}^0$-hadron correlations to the yields from hadron-hadron correlations will be discussed as well.

Presentation materials

2019-oct-31-conference_presentation-strangenessinjet_qm2019poster_v5.pdf