Date:
19. February 2021 - 11:30
Speaker:
Azadeh Maleknejad (CERN)
Abstract: 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.