Cambridge High Energy Workshop 2022 - Phase Transitions and Topological Defects in the Early Universe

Session

Observation - Blackholes

2 Aug 2022, 15:00

Center of Mathematical Sciences and Applications (CMSA), Harvard University

12. Correlating gravitational wave and gamma-ray signals from primordial black holes

Jae Hyeok Chang (Maryland U.)

02/08/2022, 15:00

Asteroid-mass primordial black holes (PBHs) can explain the observed dark matter abundance while being consistent with the current indirect detection constraints. These PBHs can produce gamma-ray signals from Hawking radiation that are within the sensitivity of future measurements by the AMEGO and e-ASTROGAM experiments. PBHs which give rise to such observable gamma-ray signals have a cosmic...

13. Early Universe Cosmology from Stochastic Gravitational Waves

Anson Hook (Maryland U.)

02/08/2022, 15:30

The causal tail of stochastic gravitational waves can be used to probe the energy density in free streaming relativistic species as well as measure gstar and beta functions as a function of temperature. In the event of the discovery of loud stochastic gravitational waves, we demonstrate that LISA can measure the free streaming fraction of the universe down to the 10^-3 level, 100 times more...

11. New measurements of the cosmic birefringence

Yuto Minami (Osaka U.)

Polarised light of the cosmic microwave background, the remnant light of the Big Bang, is sensitive to parity-violating physics, cosmic birefringence. In this presentation I report on a new measurement of cosmic birefringence from polarisation data of the European Space Agency (ESA)’s Planck satellite released in 2018. The statistical significance of the measured signal is 2.4 sigma. Recently,...

40. New measurements of the cosmic birefringence

Yuto Minami (Osaka U.)

Polarised light of the cosmic microwave background, the remnant light of the Big Bang, is sensitive to parity-violating physics, cosmic birefringence. In this presentation I report on a new measurement of cosmic birefringence from polarisation data of the European Space Agency (ESA)’s Planck satellite released in 2018. The statistical significance of the measured signal is 2.4 sigma. Recently,...