Topic: Dark Matter Indirect Search in the CMB
Speaker: Assoc. Prof. Yu Gao
Coordinates: PCFT C1124, 4pm, Thursday, May 13
Abstract: The precision cosmic microwave background (CMB) measurement and the anticipated observation of neutral hydrogen 21cm signal tell us a lot about the CMB propagation during the dark and reionization epochs of the Universe. The CMB can be a powerful indirect test of energy deposition from beyond the Standard Model physics: Dark matter annihilation and decays, or the radiation from primordial black holes. I will discuss the ionization fraction and temperature corrections as the two major imprints from new physics processes. The upcoming CMB polarization experiments and future 21cm measurement in early EoR will likely bring the prospective indirect dark matter search sensitivity to a whole new level.