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VERSION:2.0
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BEGIN:VEVENT
DTSTAMP:20261020T025333Z
LAST-MODIFIED:20180713T201204Z
DTSTART:20180719T180000Z
DTEND:20180719T190000Z
UID:event1951@bu.edu
URL:http://physics.bu.edu/internal/events/show/1951
SUMMARY: INTERACTING DARK SECTORS IN COSMOLOGY
DESCRIPTION:Featuring Manuel Buen Abad Najar\n\nPart of the PhD Final Oral 
	Exams.\n\nExamining Committee:  Martin Schmaltz\, Emanuel Katz\, Liam Fitzp
	atrick\, Claudio Chamon\, Chris Grant (Chair)\n\nAbstract:\nWe present two 
	different interacting dark sector models: one in which the dark\nmatter par
	ticle is charged under a non-abelian dark gauge group\, whose gauge bosons 
	constitute a \ndark radiation component; and one in which a fraction of the
	 dark matter has efficient \nnumber-changing self-interactions that keep it
	 warm.  We find that in general the structure \nformation is slowed down in
	 these models\, which addresses a discrepancy in the measurement of the \nÏ
	ƒ8 parameter of large-scale structure. We also perform fits to cosmological
	 data for a \ngeneralization of the non-abelian model (in which only a frac
	tion of the dark matter interacts with \nthe dark gauge bosons) and show th
	at it can ease the current experimental tension in the \nmeasurement of the
	 Hubble expansion rate H0.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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