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BEGIN:VEVENT
DTSTAMP:20260801T222456Z
LAST-MODIFIED:20190429T144312Z
DTSTART:20190502T163000Z
DTEND:20190502T173000Z
UID:event2104@bu.edu
URL:http://physics.bu.edu/internal/events/show/2104
SUMMARY:Updated BBN Constraints on Ultralight Scalar Dark Matter
DESCRIPTION:Featuring Tien-Tien Yu\, University of Oregon\n\nPart of the HE
	T Seminar Series.\n\nUltralight scalars are an attractive dark matter candi
	date.  \nWe consider the effect of such a dark matter candidate on predicti
	ons of Big Bang Nucleosynthesis. As a first study\, we look at an ultraligh
	t 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 con
	straints on ultralight scalar dark matter from Helium-4\, taking into accou
	nt the effect of the back-reaction of the Standard Model particles on the d
	ark sector. This effect was neglected in previous works but has noticeable 
	effects. Furthermore\, I will present previously uncalculated constraints f
	rom deuterium\, as well as a comparison to other probes for ultralight scal
	ar dark matter.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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