BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261017T015708Z
LAST-MODIFIED:20180514T182914Z
DTSTART:20180522T193000Z
DTEND:20180522T203000Z
UID:event1952@bu.edu
URL:http://physics.bu.edu/internal/events/show/1952
SUMMARY:A Search for CPT-violation in Positronium
DESCRIPTION:Featuring Chelsea Bartram\, U. North Carolina\n\nPart of the HE
	E Seminar Series.\n\nCALIOPE\, or CP(T) Aberrant Leptons in o-Ps Experiment
	\, is a search for CPT-violating angular\ncorrelations in the decay of orth
	o-positronium (o-Ps). Using a tagged source flush against a\ncylindrical pi
	ece of aerogel\, we generate positronium at the center of APEX\, an annular
	 array of 24\nNaI(Tl) bars. Gamma rays emitted in the decay of o-Ps interac
	t in the NaI(Tl) and the resulting\nscintillation light is detected by PMTs
	 that are optically coupled to the end of each bar. Signals\nfrom the PMT f
	eed into the DAQ\, which uses QDCs and TDCs to record the charge amplitude 
	of\npulses and timing information. I will present commissioning data from C
	ALIOPE\, including the\nfirst detection of o-Ps. I will discuss the design 
	of the DAQ and process of isolating o-Ps events\nusing various analysis cut
	s. I also will present a detailed study of systematics resulting from Geant
	4\nMonte Carlo simulations and our anticipated improvement over a previous 
	search for CPT-violation\nin o-Ps.
LOCATION:PRB 261\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
END:VEVENT
END:VCALENDAR