A1 Journal article (refereed)
Measurement of Λ(1520) production in pp collisions at √s = 7 TeV and p–Pb collisions at √sNN = 5.02 TeV (2020)

ALICE Collaboration. (2020). Measurement of Λ(1520) production in pp collisions at √s = 7 TeV and p–Pb collisions at √sNN = 5.02 TeV. European Physical Journal C, 80(2), Article 160. https://doi.org/10.1140/epjc/s10052-020-7687-2

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: European Physical Journal C

ISSN: 1434-6044

eISSN: 1434-6052

Publication year: 2020

Volume: 80

Issue number: 2

Article number: 160

Publisher: Springer

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.1140/epjc/s10052-020-7687-2

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67978

Web address of parallel published publication (pre-print): https://arxiv.org/abs/1909.00486

Abstract

The production of the Λ(1520) baryonic resonance has been measured at midrapidity in inelastic pp collisions at √s = 7 TeV and in p–Pb collisions at √sNN = 5.02 TeV for non-single diffractive events and in multiplicity classes. The resonance is reconstructed through its hadronic decay channel Λ(1520) →pK− and the charge conjugate with the ALICE detector. The integrated yields and mean transverse momenta are calculated from the measured transverse momentum distributions in pp and p–Pb collisions. The mean transverse momenta follow mass ordering as previously observed for other hyperons in the same collision systems. A Blast-Wave function constrained by other light hadrons (π, K, K0S, p, Λ) describes the shape of the Λ(1520) transverse momentum distribution up to 3.5 GeV/c in p–Pb collisions. In the framework of this model, this observation suggests that the Λ(1520) resonance participates in the same collective radial flow as other light hadrons. The ratio of the yield of Λ(1520) to the yield of the ground state particle Λ remains constant as a function of charged-particle multiplicity, suggesting that there is no net effect of the hadronic phase in p–Pb collisions on the Λ(1520) yield.

Keywords: particle physics

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2020

JUFO rating: 2