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Long-range magnetic fields in the ground state of the Standard Model plasma

Authors
  • Boyarsky, Alexey
  • Ruchayskiy, Oleg
  • Shaposhnikov, Mikhail
Type
Published Article
Publication Date
Apr 16, 2012
Submission Date
Apr 16, 2012
Identifiers
DOI: 10.1103/PhysRevLett.109.111602
Source
arXiv
License
Yellow
External links

Abstract

In thermal equilibrium the ground state of the plasma of Standard Model particles is determined by temperature and exactly conserved combinations of baryon and lepton numbers. We show that at non-zero values of the global charges a translation invariant and homogeneous state of the plasma becomes unstable and the system transits into a new state, containing a large-scale magnetic field. The origin of this effect is the parity-breaking character of weak interactions and chiral anomaly. This situation can occur in the early Universe and may play an important role in its subsequent evolution.

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