Long-Range Magnetic Fields in the Ground State of the Standard Model Plasma

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 nonzero values of the global charges a translation invariant and homogeneous state of the plasma becomes unstable and the system transits into a new equilibrium 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 could occur in the early Universe and may play an important role in its subsequent evolution.


Published in:
Physical Review Letters, 109, 11, 111602
Year:
2012
Publisher:
American Physical Society
ISSN:
0031-9007
Laboratories:




 Record created 2013-02-27, last modified 2018-09-13

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