The Mitchell Conference on Collider, Dark Matter, and Neutrino Physics 2023

Session

Axion

18 May 2023, 09:30

Hawking Auditorium (Texas A&M University)

Conveners

Axion

• Adrian Raphael Thompson

39. Recurrent Axinovae and their Cosmological Constraints

Patrick James Fox

18/05/2023, 09:30

Axion-like dark matter whose symmetry breaking occurs after the end of inflation predicts enhanced primordial density fluctuations at small scales. This leads to dense axion minihalos (or miniclusters) forming early in the history of the Universe. Condensation of axions in the minihalos leads to the formation and subsequent growth of axion stars at the cores of these halos. If, like the QCD...

24. Building non-vanilla QCD axion models

Felix Yu (Johannes Gutenberg University Mainz)

18/05/2023, 09:55

In [1] and [2], my co-authors and I revisit the the field theory of axion model building from two separate perspectives. We first considered [1] the effects of small-size instantons arising from enlarged color gauge groups on the QCD axion mass, reaffirming earlier results that QCD axion masses can be parametrically heavier than vanilla models when the confinement effects of the extended...

20. Detecting Axion-Like Particles with Primordial Black Holes

Tao Xu (The University of Oklahoma)

18/05/2023, 10:20

Asteroid-mass primordial black holes (PBH) can make up a fraction or all of dark matter. Their Hawking radiation process offers a novel channel to produce new particles, which is especially interesting if these particles are mostly secluded from the Standard Model sector. Future MeV gamma-ray telescopes provide exciting prospects for detecting the Hawking radiation signal from asteroid-mass...