Search of Neutrinoless Double Beta Decay with the GERDA Experiment

被引：22

作者：

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

Allardt, M. ^{[3
]}

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

Balata, M. ^{[1
]}

Barabanov, I. ^{[11
]}

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
]}

Borowicz, D. ^{[2
]}

Brudanin, V. ^{[4
]}

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

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

Caldwell, A. ^{[14
]}

Cattadori, C. ^{[8
]}

Chemogorov, A. ^{[12
]}

D'Andrea, V. ^{[1
]}

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

Domula, A. ^{[3
]}

Doroshkevich, E. ^{[11
]}

Egorov, V. ^{[4
]}

Falkenstein, R. ^{[19
]}

Fedorova, O. ^{[11
]}

Freund, K. ^{[19
]}

Frodyma, N. ^{[2
]}

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

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

Gooch, C. ^{[14
]}

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

Grabmayr, P. ^{[19
]}

Gurentsov, V. ^{[11
]}

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

Hampel, W. ^{[6
]}

Hegai, A. ^{[19
]}

Heisel, M. ^{[6
]}

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

Heusser, G. ^{[6
]}

Hoffmann, W. ^{[6
]}

Hult, M. ^{[5
]}

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

Ioannucci, L. ^{[1
]}

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

Jochum, J. ^{[13
]}

Junker, M. ^{[3
]}

机构：

[1] Ist Nazl Fis Nucl, 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] Eberhard Karls Univ Tubingen, Inst Phys, Tubingen, Germany

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

来源：

NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS | 2016年 / 273卷

关键词：

neutrinoless double beta decay; T-1/2(0 nu); Ge-76; enriched Ge detectors; GE-76;

D O I：

10.1016/j.nuclphysbps.2015.09.303

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0 nu beta beta) in Ge-76, located at Laboratori Nazionali del Gran Sasso of INFN (Italy). In the first phase of the experiment, a 90% confidence level (C.L.) sensitivity of 2.4 . 10(25) yr on the 0 nu beta beta decay half-life was achieved with a 21.6 kg.yr exposure and an unprecedented background index in the region of interest of 10(-2) counts/(keV.kg.yr). No excess of signal events was found, and an experimental lower limit on the half-life of 2.1 . 10(25) yr (90% C.L.) was established. Correspondingly, the limit on the effective Majorana neutrino mass is m(ee) < 0.2-0.4 eV, depending on the considered nuclear matrix element. The previous claim for evidence of a 0 nu beta beta decay signal is strongly disfavored, and the field of research is open again.

引用

页码：1876 / 1882

页数：7

共 29 条

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