First results of GERDA Phase II and consistency with background models

M. Agostini; M. Allardt; A. M. Bakalyarov; M. Balata; I. Barabanov; L. Baudis; C. Bauer; E. Bellotti; S. Belogurov; S. T. Belyaev; G. Benato; A. Bettini; L. Bezrukov; T. Bode; D. Borowicz; V. Brudanin; R. Brugnera; A. Caldwell; C. Cattadori; A. Chernogorov; V. D'Andrea; E. V. Demidova; N. Di Marco; A. Domula; E. Doroshkevich; V. Egorov; R. Falkenstein; N. Frodyma; A. Gangapshev; A. Garfagnini; C. Gooch; P. Grabmayr; V. Gurentsov; K. Gusev; J. Hakenmüller; A. Hegai; M. Heisel; S. Hemmer; W. Hofmann; M. Hult; L. V. Inzhechik; J. Janicskó Csáthy; J. Jochum; M. Junker; V. Kazalov; T. Kihm; I. V. Kirpichnikov; A. Kirsch; A. Kish; A. Klimenko; R. Kneißl; K. T. Knöpfle; O. Kochetov; V. N. Kornoukhov; V. V. Kuzminov; M. Laubenstein; A. Lazzaro; V. I. Lebedev; B. Lehnert; H. Y. Liao; M. Lindner; I. Lippi; A. Lubashevskiy; B. Lubsandorzhiev; G. Lutter; C. Macolino; B. Majorovits; W. Maneschg; E. Medinaceli; M. Miloradovic; R. Mingazheva; M. Misiaszek; P. Moseev; I. Nemchenok; D. Palioselitis; K. Panas; L. Pandola; K. Pelczar; A. Pullia; S. Riboldi; N. Rumyantseva; C. Sada; F. Salamida; M. Salathe; C. Schmitt; B. Schneider; S. Schönert; J. Schreiner; O. Schulz; A. K. Schütz; B. Schwingenheuer; O. Selivanenko; E. Shevzik; M. Shirchenko; H. Simgen; A. Smolnikov; L. Stanco; L. Vanhoefer; A. A. Vasenko; A. Veresnikova; K. Von Sturm; V. Wagner; A. Wegmann; T. Wester; C. Wiesinger; M. Wojcik; E. Yanovich; I. Zhitnikov; S. V. Zhukov; D. Zinatulina; K. Zuber; G. Zuzel

doi:10.1088/1742-6596/798/1/012106

First results of GERDA Phase II and consistency with background models

M. Agostini, M. Allardt, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, E. Bellotti, S. Belogurov, S. T. Belyaev, G. Benato, A. Bettini, L. Bezrukov, T. Bode, D. Borowicz, V. Brudanin, R. Brugnera, A. Caldwell, C. Cattadori, A. ChernogorovV. D'Andrea, E. V. Demidova, N. Di Marco, A. Domula, E. Doroshkevich, V. Egorov, R. Falkenstein, N. Frodyma, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, A. Hegai, M. Heisel, S. Hemmer, W. Hofmann, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, T. Kihm, I. V. Kirpichnikov, A. Kirsch, A. Kish, A. Klimenko, R. Kneißl, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, V. V. Kuzminov, M. Laubenstein, A. Lazzaro, V. I. Lebedev, B. Lehnert, H. Y. Liao, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, E. Medinaceli, M. Miloradovic, R. Mingazheva, M. Misiaszek, P. Moseev, I. Nemchenok, D. Palioselitis, K. Panas, L. Pandola, K. Pelczar, A. Pullia, S. Riboldi, N. Rumyantseva, C. Sada, F. Salamida, M. Salathe, C. Schmitt, B. Schneider, S. Schönert, J. Schreiner, O. Schulz, A. K. Schütz, B. Schwingenheuer, O. Selivanenko, E. Shevzik, M. Shirchenko, H. Simgen, A. Smolnikov, L. Stanco, L. Vanhoefer, A. A. Vasenko, A. Veresnikova, K. Von Sturm, V. Wagner, A. Wegmann, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, K. Zuber, G. Zuzel

Chair of Experimental Astroparticle Physics

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Abstract

The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0νββ) in ⁷⁶Ge, located at Laboratori Nazionali del Gran Sasso of INFN (Italy). GERDA operates bare high purity germanium detectors submersed in liquid Argon (LAr). Phase II of data-taking started in Dec 2015 and is currently ongoing. In Phase II 35 kg of germanium detectors enriched in ⁷⁶Ge including thirty newly produced Broad Energy Germanium (BEGe) detectors is operating to reach an exposure of 100 kg•yr within about 3 years data taking. The design goal of Phase II is to reduce the background by one order of magnitude to get the sensitivity for . To achieve the necessary background reduction, the setup was complemented with LAr veto. Analysis of the background spectrum of Phase II demonstrates consistency with the background models. Furthermore ²²⁶Ra and ²³²Th contamination levels consistent with screening results. In the first Phase II data release we found no hint for a 0νββ decay signal and place a limit of this process yr (90% C.L., sensitivity 4.0•10²⁵ yr). First results of GERDA Phase II will be presented.

Original language	English
Article number	012106
Journal	Journal of Physics: Conference Series
Volume	798
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/798/1/012106
State	Published - 7 Mar 2017
Event	2nd International Conference on Particle Physics and Astrophysics, ICPPA 2016 - Moscow, Russian Federation Duration: 10 Oct 2016 → 14 Oct 2016

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10.1088/1742-6596/798/1/012106

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Agostini, M., Allardt, M., Bakalyarov, A. M., Balata, M., Barabanov, I., Baudis, L., Bauer, C., Bellotti, E., Belogurov, S., Belyaev, S. T., Benato, G., Bettini, A., Bezrukov, L., Bode, T., Borowicz, D., Brudanin, V., Brugnera, R., Caldwell, A., Cattadori, C., ... Zuzel, G. (2017). First results of GERDA Phase II and consistency with background models. Journal of Physics: Conference Series, 798(1), Article 012106. https://doi.org/10.1088/1742-6596/798/1/012106

@article{37973a6d00ef41f4a1961f3cff41457c,

title = "First results of GERDA Phase II and consistency with background models",

abstract = "The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0νββ) in 76Ge, located at Laboratori Nazionali del Gran Sasso of INFN (Italy). GERDA operates bare high purity germanium detectors submersed in liquid Argon (LAr). Phase II of data-taking started in Dec 2015 and is currently ongoing. In Phase II 35 kg of germanium detectors enriched in 76Ge including thirty newly produced Broad Energy Germanium (BEGe) detectors is operating to reach an exposure of 100 kg•yr within about 3 years data taking. The design goal of Phase II is to reduce the background by one order of magnitude to get the sensitivity for . To achieve the necessary background reduction, the setup was complemented with LAr veto. Analysis of the background spectrum of Phase II demonstrates consistency with the background models. Furthermore 226Ra and 232Th contamination levels consistent with screening results. In the first Phase II data release we found no hint for a 0νββ decay signal and place a limit of this process yr (90% C.L., sensitivity 4.0•1025 yr). First results of GERDA Phase II will be presented.",

author = "M. Agostini and M. Allardt and Bakalyarov, {A. M.} and M. Balata and I. Barabanov and L. Baudis and C. Bauer and E. Bellotti and S. Belogurov and Belyaev, {S. T.} and G. Benato and A. Bettini and L. Bezrukov and T. Bode and D. Borowicz and V. Brudanin and R. Brugnera and A. Caldwell and C. Cattadori and A. Chernogorov and V. D'Andrea and Demidova, {E. V.} and {Di Marco}, N. and A. Domula and E. Doroshkevich and V. Egorov and R. Falkenstein and N. Frodyma and A. Gangapshev and A. Garfagnini and C. Gooch and P. Grabmayr and V. Gurentsov and K. Gusev and J. Hakenm{\"u}ller and A. Hegai and M. Heisel and S. Hemmer and W. Hofmann and M. Hult and Inzhechik, {L. V.} and Cs{\'a}thy, {J. Janicsk{\'o}} and J. Jochum and M. Junker and V. Kazalov and T. Kihm and Kirpichnikov, {I. V.} and A. Kirsch and A. Kish and A. Klimenko and R. Knei{\ss}l and Kn{\"o}pfle, {K. T.} and O. Kochetov and Kornoukhov, {V. N.} and Kuzminov, {V. V.} and M. Laubenstein and A. Lazzaro and Lebedev, {V. I.} and B. Lehnert and Liao, {H. Y.} and M. Lindner and I. Lippi and A. Lubashevskiy and B. Lubsandorzhiev and G. Lutter and C. Macolino and B. Majorovits and W. Maneschg and E. Medinaceli and M. Miloradovic and R. Mingazheva and M. Misiaszek and P. Moseev and I. Nemchenok and D. Palioselitis and K. Panas and L. Pandola and K. Pelczar and A. Pullia and S. Riboldi and N. Rumyantseva and C. Sada and F. Salamida and M. Salathe and C. Schmitt and B. Schneider and S. Sch{\"o}nert and J. Schreiner and O. Schulz and Sch{\"u}tz, {A. K.} and B. Schwingenheuer and O. Selivanenko and E. Shevzik and M. Shirchenko and H. Simgen and A. Smolnikov and L. Stanco and L. Vanhoefer and Vasenko, {A. A.} and A. Veresnikova and {Von Sturm}, K. and V. Wagner and A. Wegmann and T. Wester and C. Wiesinger and M. Wojcik and E. Yanovich and I. Zhitnikov and Zhukov, {S. V.} and D. Zinatulina and K. Zuber and G. Zuzel",

note = "Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.; 2nd International Conference on Particle Physics and Astrophysics, ICPPA 2016 ; Conference date: 10-10-2016 Through 14-10-2016",

year = "2017",

month = mar,

day = "7",

doi = "10.1088/1742-6596/798/1/012106",

language = "English",

volume = "798",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "1",

}

Agostini, M, Allardt, M, Bakalyarov, AM, Balata, M, Barabanov, I, Baudis, L, Bauer, C, Bellotti, E, Belogurov, S, Belyaev, ST, Benato, G, Bettini, A, Bezrukov, L, Bode, T, Borowicz, D, Brudanin, V, Brugnera, R, Caldwell, A, Cattadori, C, Chernogorov, A, D'Andrea, V, Demidova, EV, Di Marco, N, Domula, A, Doroshkevich, E, Egorov, V, Falkenstein, R, Frodyma, N, Gangapshev, A, Garfagnini, A, Gooch, C, Grabmayr, P, Gurentsov, V, Gusev, K, Hakenmüller, J, Hegai, A, Heisel, M, Hemmer, S, Hofmann, W, Hult, M, Inzhechik, LV, Csáthy, JJ, Jochum, J, Junker, M, Kazalov, V, Kihm, T, Kirpichnikov, IV, Kirsch, A, Kish, A, Klimenko, A, Kneißl, R, Knöpfle, KT, Kochetov, O, Kornoukhov, VN, Kuzminov, VV, Laubenstein, M, Lazzaro, A, Lebedev, VI, Lehnert, B, Liao, HY, Lindner, M, Lippi, I, Lubashevskiy, A, Lubsandorzhiev, B, Lutter, G, Macolino, C, Majorovits, B, Maneschg, W, Medinaceli, E, Miloradovic, M, Mingazheva, R, Misiaszek, M, Moseev, P, Nemchenok, I, Palioselitis, D, Panas, K, Pandola, L, Pelczar, K, Pullia, A, Riboldi, S, Rumyantseva, N, Sada, C, Salamida, F, Salathe, M, Schmitt, C, Schneider, B, Schönert, S, Schreiner, J, Schulz, O, Schütz, AK, Schwingenheuer, B, Selivanenko, O, Shevzik, E, Shirchenko, M, Simgen, H, Smolnikov, A, Stanco, L, Vanhoefer, L, Vasenko, AA, Veresnikova, A, Von Sturm, K, Wagner, V, Wegmann, A, Wester, T, Wiesinger, C, Wojcik, M, Yanovich, E, Zhitnikov, I, Zhukov, SV, Zinatulina, D, Zuber, K & Zuzel, G 2017, 'First results of GERDA Phase II and consistency with background models', Journal of Physics: Conference Series, vol. 798, no. 1, 012106. https://doi.org/10.1088/1742-6596/798/1/012106

TY - JOUR

T1 - First results of GERDA Phase II and consistency with background models

AU - Agostini, M.

AU - Allardt, M.

AU - Bakalyarov, A. M.

AU - Balata, M.

AU - Barabanov, I.

AU - Baudis, L.

AU - Bauer, C.

AU - Bellotti, E.

AU - Belogurov, S.

AU - Belyaev, S. T.

AU - Benato, G.

AU - Bettini, A.

AU - Bezrukov, L.

AU - Bode, T.

AU - Borowicz, D.

AU - Brudanin, V.

AU - Brugnera, R.

AU - Caldwell, A.

AU - Cattadori, C.

AU - Chernogorov, A.

AU - D'Andrea, V.

AU - Demidova, E. V.

AU - Di Marco, N.

AU - Domula, A.

AU - Doroshkevich, E.

AU - Egorov, V.

AU - Falkenstein, R.

AU - Frodyma, N.

AU - Gangapshev, A.

AU - Garfagnini, A.

AU - Gooch, C.

AU - Grabmayr, P.

AU - Gurentsov, V.

AU - Gusev, K.

AU - Hakenmüller, J.

AU - Hegai, A.

AU - Heisel, M.

AU - Hemmer, S.

AU - Hofmann, W.

AU - Hult, M.

AU - Inzhechik, L. V.

AU - Csáthy, J. Janicskó

AU - Jochum, J.

AU - Junker, M.

AU - Kazalov, V.

AU - Kihm, T.

AU - Kirpichnikov, I. V.

AU - Kirsch, A.

AU - Kish, A.

AU - Klimenko, A.

AU - Kneißl, R.

AU - Knöpfle, K. T.

AU - Kochetov, O.

AU - Kornoukhov, V. N.

AU - Kuzminov, V. V.

AU - Laubenstein, M.

AU - Lazzaro, A.

AU - Lebedev, V. I.

AU - Lehnert, B.

AU - Liao, H. Y.

AU - Lindner, M.

AU - Lippi, I.

AU - Lubashevskiy, A.

AU - Lubsandorzhiev, B.

AU - Lutter, G.

AU - Macolino, C.

AU - Majorovits, B.

AU - Maneschg, W.

AU - Medinaceli, E.

AU - Miloradovic, M.

AU - Mingazheva, R.

AU - Misiaszek, M.

AU - Moseev, P.

AU - Nemchenok, I.

AU - Palioselitis, D.

AU - Panas, K.

AU - Pandola, L.

AU - Pelczar, K.

AU - Pullia, A.

AU - Riboldi, S.

AU - Rumyantseva, N.

AU - Sada, C.

AU - Salamida, F.

AU - Salathe, M.

AU - Schmitt, C.

AU - Schneider, B.

AU - Schönert, S.

AU - Schreiner, J.

AU - Schulz, O.

AU - Schütz, A. K.

AU - Schwingenheuer, B.

AU - Selivanenko, O.

AU - Shevzik, E.

AU - Shirchenko, M.

AU - Simgen, H.

AU - Smolnikov, A.

AU - Stanco, L.

AU - Vanhoefer, L.

AU - Vasenko, A. A.

AU - Veresnikova, A.

AU - Von Sturm, K.

AU - Wagner, V.

AU - Wegmann, A.

AU - Wester, T.

AU - Wiesinger, C.

AU - Wojcik, M.

AU - Yanovich, E.

AU - Zhitnikov, I.

AU - Zhukov, S. V.

AU - Zinatulina, D.

AU - Zuber, K.

AU - Zuzel, G.

PY - 2017/3/7

Y1 - 2017/3/7

N2 - The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0νββ) in 76Ge, located at Laboratori Nazionali del Gran Sasso of INFN (Italy). GERDA operates bare high purity germanium detectors submersed in liquid Argon (LAr). Phase II of data-taking started in Dec 2015 and is currently ongoing. In Phase II 35 kg of germanium detectors enriched in 76Ge including thirty newly produced Broad Energy Germanium (BEGe) detectors is operating to reach an exposure of 100 kg•yr within about 3 years data taking. The design goal of Phase II is to reduce the background by one order of magnitude to get the sensitivity for . To achieve the necessary background reduction, the setup was complemented with LAr veto. Analysis of the background spectrum of Phase II demonstrates consistency with the background models. Furthermore 226Ra and 232Th contamination levels consistent with screening results. In the first Phase II data release we found no hint for a 0νββ decay signal and place a limit of this process yr (90% C.L., sensitivity 4.0•1025 yr). First results of GERDA Phase II will be presented.

AB - The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0νββ) in 76Ge, located at Laboratori Nazionali del Gran Sasso of INFN (Italy). GERDA operates bare high purity germanium detectors submersed in liquid Argon (LAr). Phase II of data-taking started in Dec 2015 and is currently ongoing. In Phase II 35 kg of germanium detectors enriched in 76Ge including thirty newly produced Broad Energy Germanium (BEGe) detectors is operating to reach an exposure of 100 kg•yr within about 3 years data taking. The design goal of Phase II is to reduce the background by one order of magnitude to get the sensitivity for . To achieve the necessary background reduction, the setup was complemented with LAr veto. Analysis of the background spectrum of Phase II demonstrates consistency with the background models. Furthermore 226Ra and 232Th contamination levels consistent with screening results. In the first Phase II data release we found no hint for a 0νββ decay signal and place a limit of this process yr (90% C.L., sensitivity 4.0•1025 yr). First results of GERDA Phase II will be presented.

UR - http://www.scopus.com/inward/record.url?scp=85016315555&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/798/1/012106

DO - 10.1088/1742-6596/798/1/012106

M3 - Conference article

AN - SCOPUS:85016315555

SN - 1742-6588

VL - 798

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012106

T2 - 2nd International Conference on Particle Physics and Astrophysics, ICPPA 2016

Y2 - 10 October 2016 through 14 October 2016

ER -

First results of GERDA Phase II and consistency with background models

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