Strangeness in Quark Matter 2024 (SQM 2024)

New insights into strange-quark hadronization measuring multiple (multi-)strange hadron production in small collision systems with ALICE

4 juin 2024, 19:28

1m

Hall Schweitzer, ground floor (PMC)

Poster Light-flavours and Strangeness Posters

Orateur

Mlle Sara Pucillo (Università di Torino & INFN)

Description

Among the most important results from Run1 and Run2 at the LHC is the observation of enhanced production of (multi-)strange to non-strange hadron yields, gradually rising from low-multiplicity to high-multiplicity pp and p--Pb collisions, reaching values close to those measured in peripheral Pb--Pb collisions. More insightful information about the production mechanism could be provided by measuring the (multi-)strange particle multiplicity distribution, P(nS), using a novel method based on counting the number of strange particles event-by-event. This measurement extends the study of strangeness production beyond the average of the distribution and represents a unique opportunity to test the connection between charged and strange particle multiplicity production.
In this contribution, new ALICE results on $K_S^0$, $\mathrm{\Lambda }$, $\mathrm{\Xi }$ and $\mathrm{\Omega }$ multiplicity distributions in pp collisions at $\sqrt{s}$ = 5.02 TeV as a function of the charged particle multiplicity, together with the average probability for the production yield of more than one particle are presented. The results are compared to state-of-the-art phenomenological models implemented in commonly-used Monte Carlo event generators, drastically enhancing the sensitivity to the different processes implemented in each approach.

Documents de présentation

Poster_SQM2024.pdf