Magnetic catalysis and anisotropic confinement in QCD

V. A. Miransky, I. A. Shovkovy

Research output: Contribution to journalArticlepeer-review

184 Scopus citations

Abstract

The expressions for dynamical masses of quarks in the chiral limit in QCD in a strong magnetic field are obtained. A low energy effective action for the corresponding Nambu-Goldstone bosons is derived and the values of their decay constants as well as the velocities are calculated. The existence of a threshold value of the ' number of colors Ncthr, dividing the theories with essentially different dynamics, is established. For the number of colors Nc≪Ncthr, an anisotropic dynamics of confinement with the confinement scale much less than AΛQCD and a rich spectrum of light glueballs is realized. For Nc of order Ncthr or larger, a conventional confinement dynamics takes place. It is found that the threshold value Ncthr grows rapidly with the magnetic field [Ncthr≳ 100 for |eB|≳(1 Gev)2]. In contrast with QCD with a nonzero baryon density, there are no principal obstacles for examining these results and predictions in lattice computer simulations.

Original languageEnglish (US)
Article number045006
JournalPhysical Review D
Volume66
Issue number4
DOIs
StatePublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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