May 29, 2018 to June 3, 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Searching for Dark Matter at the Cosmic Dawn​

May 30, 2018, 4:10 PM
20m
South Foyer | Ocotillo Room (Hyatt Regency Indian Wells Conference Center)

South Foyer | Ocotillo Room

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA

Speaker

Dr Julian Munoz (Harvard University)

Description

The nature of the dark matter is still a mystery, although current and upcoming 21-cm measurements during the cosmic dawn​ can provide ​a new arena on the search for​ the cosmological dark matter. ​This era saw the formation of the first stars, which coupled the spin temperature of hydrogen to its kinetic temperature---​producing 21-cm absorption in the CMB. The strength of this absorption acts as a thermostat, showing us if the baryons have been cooled down or heated up by different processes. In particular, during ​the cosmic dawn, the baryon-dark matter fluid is the​ slowest​ it will ever be​, making it ideal to search for dark matter elastically scattering with baryons through massless mediators, such as the photon. ​I will describe how dark-matter particles with an electric “minicharge” can significantly alter the baryonic temperature, and thus explain the anomalous 21-cm depth observed by the EDGES collaboration.
E-mail [email protected]

Primary author

Dr Julian Munoz (Harvard University)

Co-authors

Prof. Abraham Loeb (Harvard) Prof. Cora Dvorkin (Harvard)

Presentation materials