Over the past decade, the study of QCD matter under the influence of magnetic fields has received widespread attention, yet several unresolved puzzles remain, including: inverse magnetic catalysis (IMC), diamagnetism (negative magnetic susceptibility) at low temperature and the nonmonotonic behavior of charged pion mass under magnetic fields. We present a brief overview of these unresolved challenges and discuss potential solutions.
Zhai et al. (Mon,) studied this question.
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