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DTSTAMP:20260919T231408Z
LAST-MODIFIED:20160226T165841Z
DTSTART:20160302T203000Z
DTEND:20160302T213000Z
UID:event1560@bu.edu
URL:http://physics.bu.edu/internal/events/show/1560
SUMMARY:Hidden Sector Dark Matter: The Galactic Center Gamma-Ray Excess and
	 Indirect Detection Constraints
DESCRIPTION:Featuring Gilly Elor\, MIT\n\nPart of the HET Seminar Series.\n
	\nIf dark matter is embedded in a non-trivial hidden sector\, it may annihi
	late and decay to lighter hidden sector states which subsequently decay to 
	Standard Model particles. While remaining agnostic to the details of the hi
	dden sector model\, our framework  - with annihilations followed by cascadi
	ng hidden sector decays  - captures the generic broadening of the spectrum 
	of secondary particles (photons\, neutrinos\, electron-positrons\, and anti
	protons) relative to the case of dark matter annihilating directly to Stand
	ard Model particles. I will detail how such scenarios can explain the appar
	ent excess in GeV gamma-rays identified in the central Milky Way\, while ev
	ading bounds from direct detection experiments. Additionally I will describ
	e how indirect constraints on dark matter annihilation limit the parameter 
	space for such cascade/multi-particle decays. In particular I will describe
	 an investigation of the limits from the cosmic microwave background by Pla
	nk\, the Fermi measurements of photons from the Milky Way Dwarf Spheroidal 
	Galaxies\, and positron data from AMS-02. Generally the bound from the Ferm
	i dwarfs is the most constraining for annihilations to photon-rich final st
	ates\, while AMS-02 is most constraining for electron and muon final states
	; however in certain instances the CMB bounds overtake both\, due to their 
	approximate independence of the details of the hidden sector cascade.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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