Volume 476 - 42nd International Conference on High Energy Physics (ICHEP2024) - Strong Interactions and Hadron Physics Posters
Exploring the $\Lambda(1520)$ resonance in high-multiplicity proton–proton collisions at LHC energies with ALICE
S. Padhan*  on behalf of the ALICE collaboration
*: corresponding author
Full text: pdf
Pre-published on: December 17, 2024
Published on: April 29, 2025
Abstract
Resonances play a crucial role in probing the characteristics of the hadronic phase created in ultra-relativistic heavy-ion collisions. Rescattering and regeneration processes influence the measurable resonance yields and $p_\mathrm{T}$ distributions. The observation of strangeness enhancement in high-multiplicity pp and p--Pb collisions, similar to that observed in Pb--Pb collisions, highlights the need for further measurements to better understand the hadronic phase in smaller systems. The $\Lambda(1520)$ resonance, with a lifetime of approximately $13 \, \mathrm{fm/\it c}$, provides additional insights into the hadronic phase compared to the $\rm K^{*0}$ ($4 \, \mathrm{fm/\it c}$) and $\rm \phi$ ($46 \, \mathrm{fm/\it c}$) resonances.

These proceedings describe recent results on the measurement of the $\Lambda(1520)$ resonance production in high-multiplicity pp collisions, including $p_\mathrm{T}$-integrated yield $\langle \mathrm{d}N/\mathrm{d}y \rangle$, mean transverse momentum $\langle p_\mathrm{T} \rangle$, and ratio to $\Lambda(1520)$ production as a function of charged-particle multiplicity.
DOI: https://doi.org/10.22323/1.476.0570
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