Seminar
Cosmic Discordance and Interacting Dark Matter and Radiation
Prof Martin Schmaltz
Boston University
14 Jun 2017 (Wednesday)
2:00 pm
IAS4042, 4/F, Lo Ka Chung Building, Lee Shau Kee Campus, HKUST
Precision cosmological measurements, especially measurements
of the CMB from Planck, have allowed a determination of the basic
ingredients (energy densities) of the universe at per-cent level
precision. The overall picture strongly supports the so-called
concordance model with cold dark matter and dark energy. However, with
the increase in precision also came some tension in the data. Direct
measurements of the expansion rate of the universe today, H_0, and
measurements of the matter power spectrum, sigma_8, each disagree with
predictions of the concordance model at 2-3 standard deviations. In this talk,
the speaker will
review the experimental situation and propose and describe a model in
which dark matter interacts with dark radiation which can resolve both
discrepancies.
The seminar is free and open to the public. No registration is required. Seating is on a first come, first served basis.
HKUST Jockey Club Institute for Advanced Study
URL:
http://ias.ust.hk
Enquiries: ias@ust.hk / 2358 5912
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