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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2219
DTSTART:20110831T160000Z
DTEND:20110831T170000Z
DTSTAMP:20260311T155313Z
LAST-MODIFIED:20110826T182316Z
LOCATION:4274 Chamberlin
SUMMARY:Observation of Two-Neutrino Double-Beta Decay in Xe-136 with E
 XO-200\, High Energy Seminar\, Liang Yang\, SLAC
DESCRIPTION:The Enriched Xenon Observatory (EXO) is an experimental<br
 >
\nprogram designed to search for the neutrino-less double beta<br>
\
 ndecay of Xe-136. The current phase of the experiment\, EXO-<br>
\n200
 \, uses 200 kg of liquid xenon with 80% enrichment in Xe-<br>
\n136\, 
 and also serves as a prototype for a future 1-10 ton scale<br>
\nEXO e
 xperiment. The detector has been taking low background<br>
\nphysics d
 ata with enriched xenon at Waste Isolation Pilot Plant<br>
\n(WIPP) in
  New Mexico since early May 2011. After<br>
\nperforming the first cha
 rge only analysis of the data\, we report<br>
\nthe observation of two
 -neutrino double-beta decay in Xe-136<br>
\nwith T(1/2) = 2.11 +/- 0.0
 4 (stat.) +/- 0.21 (sys.) x 10^21 yr.<br>
\nThis second order process\
 , predicted by the Standard Model\, has<br>
\nbeen observed for severa
 l nuclei but not for Xe-136. The<br>
\nobserved decay rate provides ne
 w input to matrix element<br>
\ncalculations and to the search for the
  more interesting neutrinoless double-beta decay mode.
URL:https://www.physics.wisc.edu/events/?id=2219
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