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BEGIN:VEVENT
DTSTAMP:20260824T134324Z
LAST-MODIFIED:20180220T162954Z
DTSTART:20180228T210000Z
DTEND:20180301T220000Z
UID:event1905@bu.edu
URL:http://physics.bu.edu/internal/events/show/1905
SUMMARY:"Dark quarkonium formation in the early universe"
DESCRIPTION:Featuring Yael Shadmi\, Technion\n\nPart of the HET Seminar Ser
	ies.\n\nThe relic abundance of heavy stable particles charged under a confi
	ning gauge group can be depleted by a second-stage of annihilations near th
	e deconfinement temperature. This proceeds via the formation of quarkonia-l
	ike states\, in which the heavy pair subsequently annihilates. The size of 
	the quarkonium formation cross section was the subject of some debate. We e
	stimate this cross section in a simple toy model. The dominant process can 
	be viewed as a rearrangement of the heavy and light quarks\, leading to a g
	eometric cross section of hadronic size. These results can be used to const
	ruct models with ultra-heavy dark matter. They are also relevant for the co
	smology of any stable colored relic.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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