TY - JOUR
T1 - Latest results from KamLAND-Zen second phase
AU - KamLAND-Zen Collaboration
AU - Gando, Yoshihito
N1 - Funding Information:
The KamLAND-Zen experiment is supported by the Grant-in-Aid for Specially Promoted Research under grant 21000001 of the Japanese Ministry of Education, Culture, Sports, Science and Technology; the World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan; Stichting FOM in the Netherlands; and under the US Department of Energy, Office of Science, Office of Nuclear Physics under contract No. DE-AC02-05CH11231, as well as other DOE awards
Publisher Copyright:
© 2015 Elsevier B.V..
PY - 2016/4/1
Y1 - 2016/4/1
N2 - We report on preliminary results from the second phase of KamLAND-Zen double beta decay search experiment based on 114.8 days with 383 kg of 136Xe. Second phase of KamLAND-Zen was started after the purification to reduce the dominant 110mAg background identified by first phase data. The background was reduced by more than a factor of 10 by purification for liquid scintillator and xenon gas. By combining the first and second phase data and applying the improved event selection, we obtained a preliminary lower limit for the neutrinoless double-beta decay half-life, T1/2 0ν>2.6×1025 yr at 90% C.L. We also present the prospects about current phase of KamLAND-Zen and next phases with upgrades.
AB - We report on preliminary results from the second phase of KamLAND-Zen double beta decay search experiment based on 114.8 days with 383 kg of 136Xe. Second phase of KamLAND-Zen was started after the purification to reduce the dominant 110mAg background identified by first phase data. The background was reduced by more than a factor of 10 by purification for liquid scintillator and xenon gas. By combining the first and second phase data and applying the improved event selection, we obtained a preliminary lower limit for the neutrinoless double-beta decay half-life, T1/2 0ν>2.6×1025 yr at 90% C.L. We also present the prospects about current phase of KamLAND-Zen and next phases with upgrades.
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U2 - 10.1016/j.nuclphysbps.2015.09.297
DO - 10.1016/j.nuclphysbps.2015.09.297
M3 - Article
AN - SCOPUS:84973110916
SN - 2405-6014
VL - 273-275
SP - 1842
EP - 1846
JO - Nuclear and Particle Physics Proceedings
JF - Nuclear and Particle Physics Proceedings
ER -