M. Patrick Decowski
(University of Amsterdam / Nikhef)
10/09/2013, 16:00
Double Beta Decay
Oral
The decade-old KamLAND neutrino detector entered a new phase two years
ago, with the goal of studying neutrinoless double beta decay in
${}^{136}$Xe. To achieve this goal, the detector was augmented with a small
balloon at the center of the detector, filled with liquid scintillator
loaded with about 400\,kg of 91\% enriched ${}^{136}$Xe. The KamLAND-Zen
collaboration recently reported on...
Tim Daniels
(UMass Amherst)
10/09/2013, 16:20
Double Beta Decay
Oral
EXO-200 is low-background liquid Xe time-projection chamber built to detect double-beta decay of 136Xe. Located underground at the WIPP site outside Carlsbad, NM, the detector has been running with Xe enriched to 80% since May 2011. In that time, the EXO collaboration has reported both the first observation of the 2-neutrino double-beta decay mode, a conventional second-order weak process,...
Karl Twelker Twelker
(Stanford University)
10/09/2013, 16:40
Double Beta Decay
Oral
The EXO collaboration is designing a 5-ton liquid enriched-xenon TPC to search for neutrinoless double-beta decay, to be called nEXO. nEXO will have the sensitivity to rule out the inverted hierarchy. While the detector is designed to have a very low intrinsic background, the design will accomodate, as a possible upgrade, a system to recover and identify the barium daughter nucleus. This...
Jose A. Hernando
(CERN)
10/09/2013, 17:00
Double Beta Decay
Oral
NEXT-100 is an experiment to search for neutrinoless double beta decay using 100-150 kg of Xenon gas enriched to 91% with 136Xe isotope. It is under construction at Canfranc Underground Laboratory (Spain). The detector is an asymmetric time projection chamber with a plane of PMTs and a tracking plane of SiPMs located behind a pair of electro-luminescence grids. It boasts an excellent energy...
Dr
Frank Deppisch
(University College London)
10/09/2013, 17:20
Double Beta Decay
Oral
Neutrinoless double beta decay is the most powerful tool to probe not only for Majorana neutrino masses but for lepton number violating physics in general. I discuss relations between lepton number violation, double beta decay and neutrino mass, and highlight different new physics models showing how different mechanisms can trigger double beta decay. Finally, I outline possibilities to...
