Chiral asymmetry and axial anomaly in magnetized relativistic matter

E. V. Gorbar, V. A. Miransky, Igor Shovkovy

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

The induced axial current and the chiral anomaly are studied in the normal phase of magnetized relativistic matter. A special attention is paid to the role of the chiral shift parameter Δ, leading to a relative shift of the longitudinal momenta in the dispersion relations of opposite chirality fermions. In the Nambu-Jona-Lasinio model, it is shown directly from the form of the gap equation that Δ necessarily exists in the normal phase in a magnetic field. By making use of the gauge invariant point-splitting regularization, we then show that the presence of Δ essentially modifies the form of the axial current, but does not affect the conventional axial anomaly relation. By recalculating the axial current with the proper-time regularization, we conclude that the result is robust with respect to a specific regularization scheme used.

Original languageEnglish (US)
Pages (from-to)354-358
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume695
Issue number1-4
DOIs
StatePublished - Jan 10 2011

Keywords

  • Axial anomaly
  • Axial current
  • Chiral asymmetry
  • Dense relativistic matter
  • Magnetic field

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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