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Fang, Zhen

Anomalous dimension, chiral phase transition and inverse magnetic catalysis in soft-wall AdS/QCD. (English) Zbl 1365.81109

Phys. Lett., B 758, 1-8 (2016).
Summary: A modified soft-wall AdS/QCD model with a \(z\)-dependent bulk scalar mass is proposed. We argue for the necessity of a modified bulk scalar mass from the quark mass anomalous dimension and carefully constrain the form of bulk mass by the corresponding UV and IR asymptotics. After fixing the form of bulk scalar mass, we calculate the mass spectra of (axial-)vector and pseudoscalar mesons, which have a good agreement with the experimental data. The behavior of chiral phase transition is also investigated, and the results are consistent with the standard scenario and lattice simulations. Finally, the issue of chiral magnetic effects is addressed. We find that the inverse magnetic catalysis emerges naturally from the modified soft-wall model, which is consistent with the recent lattice simulations.

Cited in 2 Documents

MSC:

81V05 Strong interaction, including quantum chromodynamics

Keywords:

AdS/QCD; soft-wall; meson spectrum; chiral condensate; inverse magnetic catalysis
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