Cambridge High Energy Workshop 2021 - Axion Physics

Session

Session 4

28 Jul 2021, 14:00

Zoom / Gather.town

35. Audible Axions

Wolfram Ratzinger (University of Mainz)

28/07/2021, 14:00

Conventional approaches to probing axions and axion-like particles (ALPs)typically rely on a coupling to photons. However, if this coupling is extremely weak, ALPs become invisible and are effectively decoupled from the Standard Model. We show that such invisible axions, which are viable candidates for dark matter, can produce a stochastic gravitational wave background in the early universe...

25. New Physics and the Black Hole Mass Gap

Sam McDermott (Fermilab)

28/07/2021, 14:30

The LIGO/Virgo collaboration is making astonishing discoveries at a fantastic pace, including a heavy binary black hole merger with component masses in the “black hole mass gap,” which cannot be explained by standard stellar structure theory. In this talk, I will discuss how new light particles that couple to the Standard Model can act as an additional source of energy loss in the cores of...

45. Dynamical Axions and Gravitational Waves

Rachel Houtz (Durham IPPP)

28/07/2021, 15:00

In this talk I discuss the gravitational wave signals of dynamical axion models. In particular, I focus on models which solve the strong CP problem and include the confinement of a QCD-like gauge group at the TeV scale. Interestingly, the amplitude of the gravitational wave spectrum depends on the mass of the dynamical axion. The resulting spectra may be observed at future mid-range...