Cambridge High Energy Workshop 2021 - Axion Physics

Session

Session 8

30 Jul 2021, 13:00

Zoom / Gather.town

49. Is Our Universe the Remnant of Chiral Anomaly in Axion Inflation?

Azadeh Maleknejad (CERN)

30/07/2021, 13:00

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, and massive neutrinos, as well as the particle physics of dark...

40. New Roles of the Axion in Dark Matter, Baryogenesis, and Gravitational Waves

Raymond Co (University of Minnesota)

30/07/2021, 13:30

We propose a paradigm where the QCD axion’s unexplored cosmological evolution, a rotation in the field space, gives rise to dark matter, the baryon asymmetry, and/or gravitational waves. The rotation is initiated by explicit Peccei-Quinn (PQ) symmetry breaking effective in the early Universe. The abundance of axion dark matter is determined by the rotational speed via what we call kinetic...

48. P Not PQ

Isabel Garcia Garcia (KITP)

30/07/2021, 14:00

Parity solutions to the strong CP problem are a compelling alternative to approaches based on Peccei-Quinn symmetry, particularly given the expected violation of global symmetries in a theory of quantum gravity. The most natural of these solutions break parity at a low scale, giving rise to a host of experimentally accessible signals. We assess the status of the simplest parity-based solution...