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Inverse Magnetic Catalysis in the Soft-Wall Model of AdS/QCD

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arxiv 1610.04618 v1 pith:RDMAH2Q4 submitted 2016-10-05 hep-th hep-ph

Inverse Magnetic Catalysis in the Soft-Wall Model of AdS/QCD

classification hep-th hep-ph
keywords magneticfieldchiralmodelsoft-walltransitionmodifiedphase
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Magnetic effects on chiral phase transition have been investigated in a modified soft-wall AdS/QCD model, in which the dilaton field is taken to be negative at the ultraviolet region and positive at the infrared region as in Phys.Rev.D93(2016),101901 and JHEP1604(2016)036. The magnetic field is introduced into the background geometry by solving the Einstein-Maxwell system. After embedding the magnetized background geometry into the modified soft-wall model, the magnetic field dependent behavior of chiral condensate is worked out numerically. It is found that, in the chiral limit, the chiral phase transition remains as a second order at finite magnetic field $B$, while the symmetry restoration temperature and chiral condensate decrease with the increasing of magnetic field in small $B$ region. When including finite quark mass effect, the phase transition turns to be a crossover one, and the transition temperature still decreases with increasing magnetic field $B$ when $B$ is not very large. In this sense, inverse magnetic catalysis effect is observed in this modified soft-wall AdS/QCD model.

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Cited by 4 Pith papers

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  3. From Magnetic to Inverse Magnetic Catalysis: The Interplay of Quark and Gluon Mass Generation in Magnetic Fields

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    Coupled DSE solutions show gluon screening mass increase suppresses quark-gluon interaction and drives inverse magnetic catalysis near the chiral phase transition.

  4. Holographic entanglement entropy in the QCD phase diagram under external magnetic field

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