[Triumf-seminars] TRIUMF Theory Seminar today at 13:00

[TRIUMF Seminars]

Date/Time: Tue 2021-03-09 at 13:00

Location:  Remote              

Speaker:   Tien-Tien Yu (U Oregon)

Title:     Updated BBN Constraints on Ultralight Scalar Dark Matter

Abstract: Ultralight scalars are an attractive dark matter candidate.  We consider the effect of such a dark matter candidate on predictions of Big Bang Nucleosynthesis. As a first study, we look at an ultralight scalar with universal couplings to all massive Standard Model particles. One striking consequence of this new coupling is a change in the predicted abundances of the light elements. In this talk, I will present updated constraints on ultralight scalar dark matter from Helium-4, taking into account the effect of the back-reaction of the Standard Model particles on the dark sector. This effect was neglected in previous works but has significant effects. Furthermore, I will present previously uncalculated constraints from deuterium, as well as a comparison to other probes for ultralight scalar dark matter.

Joint seminar in collaboration with UVic theory.
https://uvic.zoom.us/j/88976589165?pwd=NFIzSzJWdUIwZEFRNzI0a2dHOEoxZz09

Meeting ID: 889 7658 9165
Password: 653103

Joint seminar in collaboration with UVic theory.

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General TRIUMF seminar information available at http://www.triumf.ca/home/upcoming-events/about-seminars-lectures