Limit on neutrinoless double beta decay of 76Ge by GERDA

被引：4

作者：

Agostini, M. ^{[15
,16
]}

Allardt, M. ^{[3
]}

Andreotti, E. ^{[19
]}

Bakalyarov, A. M. ^{[13
]}

Balata, M. ^{[1
]}

Barabanov, I. ^{[11
]}

Heider, M. Barabe ^{[6
,15
,16
]}

Barros, N. ^{[3
]}

Baudis, L. ^{[20
]}

Bauer, C. ^{[6
]}

Becerici-Schmidt, N. ^{[14
]}

Bellotti, E. ^{[7
,8
]}

Belogurov, S. ^{[11
,12
]}

Belyaev, S. T. ^{[13
]}

Benato, G. ^{[20
]}

Bettini, A. ^{[17
,18
]}

Bezrukov, L. ^{[11
]}

Bode, T. ^{[15
,16
]}

Brudanin, V. ^{[4
]}

Brugnera, R. ^{[17
,18
]}

Budjas, D. ^{[15
,16
]}

Caldwell, A. ^{[14
]}

Cattadori, C. ^{[8
]}

Chernogorov, A. ^{[12
]}

Cossavella, F. ^{[14
]}

Demidova, E. V. ^{[12
]}

Domula, A. ^{[3
]}

Egorov, V. ^{[4
]}

Falkenstein, R. ^{[19
]}

Ferella, A. ^{[20
]}

Freund, K. ^{[19
]}

Frodyma, N. ^{[2
]}

Gangapshev, A. ^{[6
,11
]}

Garfagnini, A. ^{[17
,18
]}

Gotti, C. ^{[7
,8
]}

Grabmayr, P. ^{[19
]}

Gurentsov, V. ^{[11
]}

Gusev, K. ^{[4
,13
,15
,16
]}

Guthikonda, K. K. ^{[20
]}

Hampel, W. ^{[6
]}

Hegai, A. ^{[19
]}

Heisel, M. ^{[6
]}

Hemmer, S. ^{[17
,18
]}

Heusser, G. ^{[6
]}

Hofmann, W. ^{[6
]}

Hult, M. ^{[5
]}

Inzhechik, L. V. ^{[11
]}

Csathy, J. Janicsko ^{[15
,16
]}

Jochum, J. ^{[19
]}

Junker, M. ^{[1
]}

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, LNGS, Assergi, Italy

[2] Jagiellonian Univ, Inst Phys, Krakow, Poland

[3] Tech Univ Dresden, Inst Kern & Teilchenphys, Dresden, Germany

[4] Joint Inst Nucl Res, Dubna, Russia

[5] Inst Reference Mat & Measurements, Geel, Belgium

[6] Max Planck Inst Kernphys, Heidelberg, Germany

[7] Univ Milano Bicocca, Dipartimento Fis, Milan, Italy

[8] INFN Milano Bicocca, Milan, Italy

[9] Univ Milan, Dipartimento Fis, Milan, Italy

[10] INFN Milano, Milan, Italy

[11] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

[12] Inst Theoret & Expt Phys, Moscow, Russia

[13] Kurchatov Inst, Natl Res Ctr, Moscow, Russia

[14] Max Planck Inst Phys & Astrophys, Munich, Germany

[15] Tech Univ Munich, Dept Phys, Munich, Germany

[16] Tech Univ Munich, Excellence Cluster Universe, Munich, Germany

[17] Univ Padua, Dipartimento Fis & Astron, Padua, Italy

[18] INFN Padova, Padua, Italy

[19] Univ Tubingen, Inst Phys, Tubingen, Germany

[20] Univ Zurich, Inst Phys, Zurich, Switzerland

来源：

13TH INTERNATIONAL CONFERENCE ON TOPICS IN ASTROPARTICLE AND UNDERGROUND PHYSICS, TAUP 2013 | 2015年 / 61卷

关键词：

double beta decay; 0-NU-BETA-BETA DECAY; SEARCH;

D O I：

10.1016/j.phpro.2015.06.002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The Gerda experiment at the Laboratori Nazionali del Gran Sasso in Italy uses germanium detectors made from material with an enriched Ge-76 isotope fraction to search for neutrinoless double beta decay of this nucleus. Applying a blind analysis we find no signal after an exposure of 21.6 kg.yr and a background of about 0.01 cts/(keV.kg.yr). A half-life limit of T-1/20(v) > 2.1 . 10(25) yr (90% C.L.) is extracted. The previous claim of a signal for Ge-76 is excluded with 99% probability in a model independent way. (C) 2015 The Authors. Published by Elsevier B.V.

引用

页码：828 / 837

页数：10

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