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DTSTAMP:20261021T162841Z
LAST-MODIFIED:20160210T184929Z
DTSTART:20160217T203000Z
DTEND:20160217T213000Z
UID:event1553@bu.edu
URL:http://physics.bu.edu/internal/events/show/1553
SUMMARY:Effective Field Theory of Heavy WIMP Annihilation
DESCRIPTION:Featuring Matthew Baumgart\, Rutgers\n\nPart of the HET Seminar
	 Series.\n\nWe systematically compute the annihilation rate for winos and h
	iggsinos into the final state gamma + X.  The radiative corrections to this
	 process receive enhancement from the large Bloch-Nordsieck-Violating Sudak
	ov logarithm\, log(2 M_\chi/M_W).  We resum the double logs and include sin
	gle logs to fixed order using a formalism that combines nonrelativistic and
	 soft-collinear effective field theories.  For the wino case\, we adapt an 
	exclusion curve using results of the HESS experiment.  At the thermal relic
	 mass of 3 TeV\, LL' corrections result in a ~30% reduction in rate relativ
	e to LL.  Nonetheless\, single logs do not save the wino\, and it is still 
	excluded by an order of magnitude.  Experimental cuts produce an endpoint r
	egion which\, our results show\, significantly effects the higgsino rate at
	 its thermal relic mass near 1 TeV and is deserving of further study.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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