Cosmological magnetic fields and its implications on the early Universe and particle physics

Recent observations of TeV blazars by Fermi identified deficits of secondary GeV cascade photons.
These observations can be explained by intergalactic magnetic fields, which may have a primordial origin.
If magnetic fields are generated before the electroweak symmetry breaking,
nontrivial interaction between (hyper)magnetic fields and other particles can cause some interesting
and non negligible phenomena in the early Universe.
In this talk, I will show that the baryon asymmetry can be generated by the chiral anomaly and
this mechanism might be responsible for the present baryon asymmetry of the Universe.
If this mechanism is responsible for the present Universe, the BSM physics is needed for the generation
of (hyper)magnetic fields but not for the baryogenesis.