Is our Universe the Remnant of Chiral Anomaly in Inflation?
by
Azadeh Maleknejad(CERN)
→
Europe/Zurich
CERN
CERN
Description
Modern cosmology has been remarkably successful in describing the Universe from
a second after the Big Bang until today. However, its physics before that time
is still much less certain. It profoundly involves particle theory beyond the
Standard Model to explain long-standing puzzles: the origin of the observed
matter asymmetry, nature of dark matter, and cosmic inflation. In this talk, I
will explain that fractions of a second after the Big Bang, relic SU(2)𝑅
gauge field with its axion in inflation can possibly relate and explain these
seemingly unrelated pillars of modern cosmology. Thus, it can naturally explain
the observed coincidences among cosmological parameters. The baryon asymmetry
and dark matter today are remnants of a pure quantum effect (chiral anomaly) in
inflation, which, thanks to flavor effects, are memorized by cosmic evolution.
As a smoking gun, this setup has a robust observable signature on the GW
background.
