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

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

2012-04-16

arxiv.org/abs/1204.3604v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages. Comments are welcome

Scientific paper

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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