A1 Journal article (refereed)
Multiplicity-dependent production of Σ(1385)± and Ξ(1530)0 in pp collisions at s√=13 TeV (2024)

The ALICE collaboration. (2024). Multiplicity-dependent production of Σ(1385)± and Ξ(1530)0 in pp collisions at s√=13 TeV. Journal of High Energy Physics, 2024, Article 317. https://doi.org/10.1007/JHEP05(2024)317

JYU authors or editors

Publication details

All authors or editors: The ALICE collaboration

Journal or series: Journal of High Energy Physics

ISSN: 1126-6708

eISSN: 1029-8479

Publication year: 2024

Publication date: 29/05/2024

Volume: 2024

Article number: 317

Publisher: Springer Nature

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.1007/JHEP05(2024)317

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/97639

Web address of parallel published publication (pre-print):  https://doi.org/10.48550/arXiv.2308.16116

Abstract

The production yields of the Σ(1385)± and Ξ(1530)0 resonances are measured in pp collisions at s√=13 TeV with ALICE. The measurements are performed as a function of the charged-particle multiplicity ⟨dNch/dη⟩, which is related to the energy density produced in the collision. The results include transverse momentum (pT) distributions, pT-integrated yields, mean transverse momenta of Σ(1385)± and Ξ(1530)0, as well as ratios of the pT-integrated resonance yields relative to yields of other hadron species. The Σ(1385)±/π± and Ξ(1530)0/π± yield ratios are consistent with the trend of the enhancement of strangeness production from low to high multiplicity pp collisions, which was previously observed for strange and multi-strange baryons. The yield ratio between the measured resonances and the long-lived baryons with the same strangeness content exhibits a hint of a mild increasing trend at low multiplicity, despite too large uncertainties to exclude the flat behaviour. The results are compared with predictions from models such as EPOS-LHC and PYTHIA 8 with Rope shoving. The latter provides the best description of the multiplicity dependence of the Σ(1385)± and Ξ(1530)0 production in pp collisions at s√=13 TeV.

Keywords: hadrons; particle physics

Free keywords:  hadron-hadron scattering; particle and resonance production

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Ministry reporting: Yes

VIRTA submission year: 2024

Preliminary JUFO rating: 3