Cambridge High Energy Workshop 2021 - Axion Physics

Session

Session 2

27 Jul 2021, 14:00

Zoom / Gather.town

56. Microphysics from Astrophysics

Chanda Prescod-Weinstein (University of New Hampshire)

27/07/2021, 14:00

In this talk, I will discuss a range of approaches to better understand ultralight and light scalar dark matter candidates, including axion-like particles. I will discuss results from PySiUltraLight, a modification of the PyUltraLight code that includes self-interaction terms to model the dynamical evolution of axion fields. I will discuss work that shows that the self-interaction should not...

44. Constraints on Axions from Cosmic Distance Measurements

Manuel A. Buen-Abad (Brown University)

27/07/2021, 14:30

Axion couplings to photons could induce photon-axion conversion in the presence of magnetic fields in the Universe. This conversion could impact various cosmic distance measurements, such as luminosity distances to type Ia supernovae and angular distances to galaxy clusters, in different ways. In this talk we consider different combinations of the most up-to-date distance measurements to...

38. The Cosmic Axion Background

Jeff Dror (UC Santa Cruz)

27/07/2021, 15:00

Existing searches for cosmic axions relics have relied heavily on the axion being non-relativistic and making up dark matter. However, light axions can be copiously produced in the early Universe and remain relativistic today, thereby constituting a Cosmic axion Background (CaB). As prototypical examples of axion sources, we consider thermal production, dark-matter decay, parametric resonance,...