Particle Physics on the Plains​ 2022 Part 2

Session

Session 1

22 Oct 2022, 09:00

2001 Malott Hall (University of Kansas)

Conveners

Session 1

• Francesc Ferrer (Washington University in St Louis)

29. Stellar Binary Hardening from Solar Mass Primordial Black Holes

Badal Bhalla (University of Oklahoma)

22/10/2022, 09:00

Light primordial black holes (PBHs) can explain the observed dark matter abundance while being consistent with the current indirect detection constraints. These light PBHs could have a wide range of effects on stellar binaries. In particular, the separation of binary systems may be sensitive to the mass and abundance of PBHs which perturb them. This sensitivity could show up in current and...

33. Correlating Gravitational Wave and Gamma-ray Signals from Primordial Black Holes

Tao Xu

22/10/2022, 09:20

Asteroid-mass primordial black holes (PBH) can explain the observed dark matter abundance while being consistent with the current indirect detection constraints. These PBH can produce gamma-ray signals from Hawking radiation that are within the sensitivity of future MeV sky searches. PBH which give rise to such observable gamma-ray signals have a cosmic origin from large primordial...

27. The Baryon-Dark Matter Coincidence Problem and Primordial Black Holes

Thomas Gehrman (University of Oklahoma)

22/10/2022, 09:40

We study the Baryon-Dark Matter Coincidence Problem with primordial black holes (PBHs). PBHs induce baryogenesis through the Baumann-Steinhardt-Turok mechanism, by Hawking evaporating into a beyond-Standard Model particle $X$ that has baryon number and CP-violating couplings to the Standard Model. Dark matter is also produced in our mechanism. The gravitational wave signatures are presented,...

38. Globular-cluster constraints on the axion-photon coupling

Takuya Okawa

22/10/2022, 10:00

We propose a novel way to seek eV-MeV axions in a globular cluster. Axions can be produced inside stars via the Primakoff process and photon coalescence, and subsequently, decay into two photons. In particular, the hot and dense plasma in the core of horizontal branch (HB) stars in globular clusters could produce eV-MeV axion efficiently. Future MeV gamma-ray telescopes might be able to detect...