Magnetic susceptibility of QCD vacuum at finite density from the nonlocal chiral quark model

2007/12/13 by Seung-il Nam, Nam, Seung-il, Hyun-Chul Kim +1
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.0712.2151

5 pages, 2 figures, Talk given at International Workshop Chiral07, Osaka, Japan, 13-16 Nov 2007

openalex publication_date 2007/12/13 · arxiv created 2008/02/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present in this talk a recent investigation on the magnetic susceptibility (chi) of the QCD vacuum at finite density, utilizing the nonlocal chiral quark model from the instanton vacuum. We take into account the nonzero current-quark mass (m_q) explicitly to consider the effect of explicit flavor SU(3) symmetry breaking. It turns out that, when we turn on the current-quark mass, chi becomes smaller, indicating less response to the externally induced electromagnetic field, in comparison to that for m_q=0.

Related

• Magnetic susceptibility of the QCD vacuum
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• Magnetic properties in the inhomogeneous chiral phase
• Magnetic susceptibility in QCD
• Quark condensates and magnetization in chiral perturbation theory in a uniform magnetic field