Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen

A Gando¹, Y Gando¹, T Hachiya¹, A Hayashi¹, S Hayashida¹, H Ikeda¹, K Inoue^{1

2}, K Ishidoshiro¹, Y Karino¹, M Koga^{1

2}, S Matsuda¹, T Mitsui¹, K Nakamura^{1

2}, S Obara¹, T Oura¹, H Ozaki¹, I Shimizu¹, Y Shirahata¹, J Shirai¹, A Suzuki¹, T Takai¹, K Tamae¹, Y Teraoka¹, K Ueshima¹, H Watanabe¹, A Kozlov², Y Takemoto², S Yoshida³, K Fushimi⁴, T I Banks⁵, B E Berger^{2

5}, B K Fujikawa^{2

5}, T O'Donnell⁵, L A Winslow⁶, Y Efremenko^{2

7}, H J Karwowski⁸, D M Markoff⁸, W Tornow^{2

8}, J A Detwiler^{2

9}, S Enomoto^{2

9}, M P Decowski^{2

10}; KamLAND-Zen Collaboration

Affiliations

¹ Research Center for Neutrino Science, Tohoku University, Sendai 980-8578, Japan.
² Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
³ Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
⁴ Faculty of Integrated Arts and Science, University of Tokushima, Tokushima 770-8502, Japan.
⁵ Physics Department, University of California, Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
⁶ Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
⁷ Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
⁸ Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA; Physics Departments at Duke University, Durham, North Carolina 27708, USA; North Carolina Central University, Durham, North Carolina 27707, USA; and The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
⁹ Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA.
¹⁰ Nikhef and the University of Amsterdam, Science Park, Amsterdam 1098XG, The Netherlands.

PMID: 27588852
DOI: 10.1103/PhysRevLett.117.082503

Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen

A Gando et al. Phys Rev Lett. 2016.

. 2016 Aug 19;117(8):082503.

doi: 10.1103/PhysRevLett.117.082503. Epub 2016 Aug 16.

Authors

Affiliations

¹ Research Center for Neutrino Science, Tohoku University, Sendai 980-8578, Japan.
² Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
³ Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
⁴ Faculty of Integrated Arts and Science, University of Tokushima, Tokushima 770-8502, Japan.
⁵ Physics Department, University of California, Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
⁶ Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
⁷ Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
⁸ Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA; Physics Departments at Duke University, Durham, North Carolina 27708, USA; North Carolina Central University, Durham, North Carolina 27707, USA; and The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
⁹ Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA.
¹⁰ Nikhef and the University of Amsterdam, Science Park, Amsterdam 1098XG, The Netherlands.

PMID: 27588852
DOI: 10.1103/PhysRevLett.117.082503

Erratum in

Publisher's Note: Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen [Phys. Rev. Lett. 117, 082503 (2016)].
Gando A, Gando Y, Hachiya T, Hayashi A, Hayashida S, Ikeda H, Inoue K, Ishidoshiro K, Karino Y, Koga M, Matsuda S, Mitsui T, Nakamura K, Obara S, Oura T, Ozaki H, Shimizu I, Shirahata Y, Shirai J, Suzuki A, Takai T, Tamae K, Teraoka Y, Ueshima K, Watanabe H, Kozlov A, Takemoto Y, Yoshida S, Fushimi K, Banks TI, Berger BE, Fujikawa BK, O'Donnell T, Winslow LA, Efremenko Y, Karwowski HJ, Markoff DM, Tornow W, Detwiler JA, Enomoto S, Decowski MP; KamLAND-Zen Collaboration. Gando A, et al. Phys Rev Lett. 2016 Sep 2;117(10):109903. doi: 10.1103/PhysRevLett.117.109903. Epub 2016 Sep 2. Phys Rev Lett. 2016. PMID: 27636501

Abstract

We present an improved search for neutrinoless double-beta (0νββ) decay of ^{136}Xe in the KamLAND-Zen experiment. Owing to purification of the xenon-loaded liquid scintillator, we achieved a significant reduction of the ^{110m}Ag contaminant identified in previous searches. Combining the results from the first and second phase, we obtain a lower limit for the 0νββ decay half-life of T_{1/2}^{0ν}>1.07×10^{26} yr at 90% C.L., an almost sixfold improvement over previous limits. Using commonly adopted nuclear matrix element calculations, the corresponding upper limits on the effective Majorana neutrino mass are in the range 61-165 meV. For the most optimistic nuclear matrix elements, this limit reaches the bottom of the quasidegenerate neutrino mass region.

PubMed Disclaimer

LinkOut - more resources

Full Text Sources
- American Physical Society
Other Literature Sources
- The Lens - Patent Citations Database
- 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 Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen

Affiliations

Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen

Authors

Affiliations

Erratum in

Abstract

LinkOut - more resources

Full Text Sources

Other Literature Sources