Bayesian inference of the magnetic component of quark-gluon plasma

2025/10/19 by Yu Guo, Guo, Yu, Jinfeng Liao +3 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #Pulsars and Gravitational Waves Research

paper · pdf · doi:10.48550/arxiv.2510.16838

Abstract

The chromo-magnetic monopoles (CMM), emergent topological excitations of non-Abelian gauge fields carrying chromo-magnetic charge, have long been postulated to play an important role in the vacuum confinement of quantum chromodynamics (QCD), the deconfinement transition at temperature T_c≈ 160\rm MeV, as well as the strongly coupled nature of quark-gluon plasma (QGP). While such CMMs have been found to provide solutions for challenging puzzles from heavy-ion collision measurements, they were typically introduced as model assumptions in the past. Here we show how their very existence can be determined and their abundance extracted in a data-driven way for the first time. Using the cujet3 framework for calculations of jet energy loss and analyzing a comprehensive experimental data set for nuclear modification factor (R_AA) and elliptic flow (v₂) of high-transverse-momentum hadrons, the fraction of CMMs in the QGP is obtained by Bayesian inference and is found to be substantial in the 1∼ 2 T_c region. The posterior CMM fraction is further validated by excellent agreement with additional data and is also shown to predict QGP transport properties quantitatively consistent with the state-of-the-art knowledge.

Citations

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Cited by

• Data-Driven Analysis for the Bottomonium Potential in the Quark-Gluon Plasma

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