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Unlocking "imprints" of conserved charges in the initial state of heavy-ion collisions

2024/11/01 by Fernando G. Gardim, Dekrayat Almaalol, Gardim, Fernando G. +6
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · pdf · doi:10.48550/arxiv.2411.00590

openalex publication_date 2024/11/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Hydrodynamic approaches to modeling relativistic high-energy heavy-ion collisions are based on the conservation of energy and momentum. However, the medium formed in these collisions also carries additional conserved quantities, including baryon number (B), strangeness (S), and electric charge (Q). In this Letter, we propose a new set of anisotropic flow observables designed to be exclusively sensitive to the effects of conserved BSQ charge fluctuations, providing insight into the initial state. Using the recently developed hydrodynamic framework \iccing+\ccake, we show that these new observables provide a measurable effect of initial BSQ charge fluctuations (ranging up to ∼ 10%), which can be tested by experiments.

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