Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector

J B Albert¹, G Anton², I Badhrees³, P S Barbeau⁴, R Bayerlein², D Beck⁵, V Belov⁶, M Breidenbach⁷, T Brunner^{8

9}, G F Cao¹⁰, W R Cen¹⁰, C Chambers¹¹, B Cleveland^{12

13}, M Coon⁵, A Craycraft¹¹, W Cree³, T Daniels⁷, M Danilov⁶, S J Daugherty¹, J Daughhetee¹⁴, J Davis⁷, S Delaquis⁷, A Der Mesrobian-Kabakian¹², R DeVoe¹⁵, T Didberidze¹⁶, J Dilling⁹, A Dolgolenko⁶, M J Dolinski¹⁷, W Fairbank¹¹, J Farine¹², S Feyzbakhsh¹⁸, P Fierlinger¹⁹, D Fudenberg¹⁵, R Gornea^{3

9}, K Graham³, G Gratta¹⁵, C Hall²⁰, E V Hansen¹⁷, J Hoessl², P Hufschmidt², M Hughes¹⁶, A Jamil^{2

15}, M J Jewell¹⁵, A Johnson⁷, S Johnston¹⁸, A Karelin⁶, L J Kaufman¹, T Koffas³, S Kravitz¹⁵, R Krücken⁹, A Kuchenkov⁶, K S Kumar²¹, Y Lan⁹, D S Leonard²², G S Li¹⁵, S Li⁵, C Licciardi³, Y H Lin¹⁷, R MacLellan¹⁴, T Michel², B Mong⁷, D Moore²³, K Murray⁸, R Nelson²⁴, O Njoya²¹, A Odian⁷, I Ostrovskiy¹⁶, A Piepke¹⁶, A Pocar¹⁸, F Retière⁹, P C Rowson⁷, J J Russell⁷, S Schmidt², A Schubert¹⁵, D Sinclair^{3

9}, V Stekhanov⁶, M Tarka²¹, T Tolba¹⁰, R Tsang¹⁶, P Vogel²⁵, J-L Vuilleumier²⁶, M Wagenpfeil², A Waite⁷, T Walton¹¹, M Weber¹⁵, L J Wen¹⁰, U Wichoski¹², G Wrede², L Yang⁵, Y-R Yen¹⁷, O Ya Zeldovich⁶, J Zettlemoyer¹, T Ziegler²; EXO-200 Collaboration

Affiliations

¹ Physics Department and CEEM, Indiana University, Bloomington, Indiana 47405, USA.
² Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander University Erlangen-Nürnberg, Erlangen 91058, Germany.
³ Physics Department, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
⁴ Department of Physics, Duke University, and Triangle Universities Nuclear Laboratory (TUNL), Durham, North Carolina 27708, USA.
⁵ Physics Department, University of Illinois, Urbana-Champaign, Illinois 61801, USA.
⁶ Institute for Theoretical and Experimental Physics, Moscow, 117218, Russia.
⁷ SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
⁸ Physics Department, McGill University, Montreal, Quebec, Canada.
⁹ TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
¹⁰ Institute of High Energy Physics, Beijing 100049, China.
¹¹ Physics Department, Colorado State University, Fort Collins, Colorado 80523, USA.
¹² Department of Physics, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
¹³ SNOLAB, Sudbury, Ontario P3Y 1N2, Canada.
¹⁴ Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
¹⁵ Physics Department, Stanford University, Stanford, California 94305, USA.
¹⁶ Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487, USA.
¹⁷ Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA.
¹⁸ Amherst Center for Fundamental Interactions and Physics Department, University of Massachusetts, Amherst, Massachusetts 01003, USA.
¹⁹ Technische Universität München, Physikdepartment and Excellence Cluster Universe, Garching 80805, Germany.
²⁰ Physics Department, University of Maryland, College Park, Maryland 20742, USA.
²¹ Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USA.
²² IBS Center for Underground Physics, Daejeon 34047, Korea.
²³ Department of Physics, Yale University, New Haven, Connecticut 06511, USA.
²⁴ Waste Isolation Pilot Plant, Carlsbad, New Mexico 88220, USA.
²⁵ Kellogg Lab, Caltech, Pasadena, California 91125, USA.
²⁶ LHEP, Albert Einstein Center, University of Bern, Bern 3012, Switzerland.

PMID: 29542972
DOI: 10.1103/PhysRevLett.120.072701

Free article

Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector

J B Albert et al. Phys Rev Lett. 2018.

Free article

. 2018 Feb 16;120(7):072701.

doi: 10.1103/PhysRevLett.120.072701.

Authors

Affiliations

¹ Physics Department and CEEM, Indiana University, Bloomington, Indiana 47405, USA.
² Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander University Erlangen-Nürnberg, Erlangen 91058, Germany.
³ Physics Department, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
⁴ Department of Physics, Duke University, and Triangle Universities Nuclear Laboratory (TUNL), Durham, North Carolina 27708, USA.
⁵ Physics Department, University of Illinois, Urbana-Champaign, Illinois 61801, USA.
⁶ Institute for Theoretical and Experimental Physics, Moscow, 117218, Russia.
⁷ SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
⁸ Physics Department, McGill University, Montreal, Quebec, Canada.
⁹ TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
¹⁰ Institute of High Energy Physics, Beijing 100049, China.
¹¹ Physics Department, Colorado State University, Fort Collins, Colorado 80523, USA.
¹² Department of Physics, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
¹³ SNOLAB, Sudbury, Ontario P3Y 1N2, Canada.
¹⁴ Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
¹⁵ Physics Department, Stanford University, Stanford, California 94305, USA.
¹⁶ Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487, USA.
¹⁷ Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA.
¹⁸ Amherst Center for Fundamental Interactions and Physics Department, University of Massachusetts, Amherst, Massachusetts 01003, USA.
¹⁹ Technische Universität München, Physikdepartment and Excellence Cluster Universe, Garching 80805, Germany.
²⁰ Physics Department, University of Maryland, College Park, Maryland 20742, USA.
²¹ Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USA.
²² IBS Center for Underground Physics, Daejeon 34047, Korea.
²³ Department of Physics, Yale University, New Haven, Connecticut 06511, USA.
²⁴ Waste Isolation Pilot Plant, Carlsbad, New Mexico 88220, USA.
²⁵ Kellogg Lab, Caltech, Pasadena, California 91125, USA.
²⁶ LHEP, Albert Einstein Center, University of Bern, Bern 3012, Switzerland.

PMID: 29542972
DOI: 10.1103/PhysRevLett.120.072701

Abstract

Results from a search for neutrinoless double-beta decay (0νββ) of ^{136}Xe are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improved to σ/E=1.23%, the electric field in the drift region has been raised by 50%, and a system to suppress radon in the volume between the cryostat and lead shielding has been implemented. In addition, analysis techniques that improve topological discrimination between 0νββ and background events have been developed. Incorporating these hardware and analysis improvements, the median 90% confidence level 0νββ half-life sensitivity after combining with the full data set acquired before the upgrade has increased twofold to 3.7×10^{25} yr. No statistically significant evidence for 0νββ is observed, leading to a lower limit on the 0νββ half-life of 1.8×10^{25} yr at the 90% confidence level.

PubMed Disclaimer

LinkOut - more resources

Full Text Sources
- American Physical Society
- CORE
Other Literature Sources
- scite Smart Citations

Save citation to file

Email citation

Add to Collections

Add to My Bibliography

Your saved search

Create a file for external citation management software

Your RSS Feed

Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector

Affiliations

Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector

Authors

Affiliations

Abstract

LinkOut - more resources

Full Text Sources

Other Literature Sources