Measuring μB at the LHC with ALICE via antiparticle-over-particle ratios

Ciacco, M. (2023) Measuring μB at the LHC with ALICE via antiparticle-over-particle ratios. Il nuovo cimento C, 46 (3). pp. 1-7. ISSN 1826-9885

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The baryon chemical potential μB is a fundamental parameter for the statistical mechanical description of particle production in heavy-ion collisions: its value encodes the average net baryon content of the fireball at chemical freeze-out. The first μB measurement in high-energy Pb-Pb collisions at the LHC was published in 2018 in Nature, and it was found that μB = 0.7 ± 3.8 MeV. In this contribution, an improved μB measurement based on the study of antiparticle-to-particle ratios for protons, 3He and hypertriton (3ΛH) using the data collected by ALICE in Run 2 of the LHC, is presented. The isospin chemical potential is also determined via the π−/π+ ratio. The obtained μB represents the most precise measurement available.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 29 Jan 2024 12:02
Last Modified: 29 Jan 2024 12:02

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