Λ and Λ global polarization from the core-corona model

2022/07/21 by Alejandro Ayala, Ayala, Alejandro, Isabel Domínguez +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2207.10560

openalex publication_date 2022/07/21 · openalex created_date 2022/07/23 · openalex updated_date 2026/07/28

Abstract

We report on work aimed to describe the Λ and Λ global polarizations in a heavy-ion collision environment using the core-corona model, where the source of these hyperons is a high-density core and a less dense corona. We show that the overall properties of the polarization excitation functions can be linked to the relative abundance of Λs and Λs coming from the core versus those coming from the corona. Both global polarizations peak at collision energies √s_NN \lesssim 10 GeV. The exact positions and heights of these peaks depend not only on a reversal of relative abundances with collision energy, but also on the centrality class, both related to the QGP volume and lifetime.

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