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Title: Results from KamLAND-Zen

KamLAND-Zen reports on a preliminary search for neutrinoless double-beta decay with 136Xe based on 114.8 live-days after the purification of the xenon loaded liquid scintillator. In this data, the problematic 110mAg background peak identified in previous searches is reduced by more than a factor of 10. By combining the KamLAND-Zen pre- and post-purification data, we obtain a preliminary lower limit on the 0νββ decay half-life of T 1/2 > 2.6×10 25 yr at 90% C.L. The search sensitivity will be enhanced with additional low background data after the purification. As a result, prospects for further improvements with future KamLAND-Zen upgrades are also presented.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [1] more »;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [4] ;  [5] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [8] ;  [11] ;  [12] ;  [13] ;  [14] ;  [14] ;  [15] ;  [16] ;  [17] ;  [17] « less
  1. Tohoku Univ., Miyagi (Japan)
  2. Tohoku Univ., Miyagi (Japan); Univ. of Tokyo, Kashiwa (Japan)
  3. Tohoku Univ., Miyagi (Japan); High Energy Accelerator Research Organization, Ibaraki (Japan)
  4. Tohoku Univ., Miyagi (Japan); Osaka Univ., Oasaka (Japan)
  5. Univ. of Tokyo, Kashiwa (Japan)
  6. Osaka Univ., Osaka (Japan)
  7. Univ. of Tokushima, Tokushima (Japan)
  8. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  9. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States);
  10. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Tokyo, Kashiwa (Japan)
  11. Univ. of California, Los Angeles, CA (United States)
  12. Colorado State Univ., Fort Collins, CO (United States)
  13. Univ. of Tennessee, Knoxville, TN (United States); Univ. of Tokyo, Kashiwa (Japan)
  14. Triangle Univ. Nuclear Lab., Durham, NC (United States); Duke Univ., Durham, NC (United States); North Carolina Central Univ., Durham, NC (United States); Univ. of North Carolina at Chapel Hill, Chapel Hill, NC (United States)
  15. Triangle Univ. Nuclear Lab., Durham, NC (United States); Duke Univ., Durham, NC (United States); North Carolina Central Univ., Durham, NC (United States); Univ. of North Carolina at Chapel Hill, Chapel Hill, NC (United States); Univ. of Tokyo, Kashiwa (Japan)
  16. Univ. of Washington, Seattle, WA (United States)
  17. Univ. of Washington, Seattle, WA (United States); Univ. of Tokyo, Kashiwa (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1666; Conference: XXVI International Conference on Neutrino Physics and Astrophysics, Boston, MA (United States), 2–7 June 2014; Journal ID: ISSN 0094-243X
Publisher:
AIP
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; double beta decay; majorana neutrino mass
OSTI Identifier:
1213578

Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, T., Ishio, S., Koga, M., Matsuda, R., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Obara, S., Oki, Y., Otani, M., Oura, T., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Tachibana, H., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamauchi, Y., Yoshida, H., Kozlov, A., Takemoto, Y., Yoshido, S., Fushimi, K., Banks, T. I., Freedman, S. J., Fujikawa, B. K., O'Donnell, T., Winslow, L. A., Berger, B. E., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.. Results from KamLAND-Zen. United States: N. p., Web. doi:10.1063/1.4915593.
Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, T., Ishio, S., Koga, M., Matsuda, R., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Obara, S., Oki, Y., Otani, M., Oura, T., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Tachibana, H., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamauchi, Y., Yoshida, H., Kozlov, A., Takemoto, Y., Yoshido, S., Fushimi, K., Banks, T. I., Freedman, S. J., Fujikawa, B. K., O'Donnell, T., Winslow, L. A., Berger, B. E., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., & Decowski, M. P.. Results from KamLAND-Zen. United States. doi:10.1063/1.4915593.
Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, T., Ishio, S., Koga, M., Matsuda, R., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Obara, S., Oki, Y., Otani, M., Oura, T., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Tachibana, H., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamauchi, Y., Yoshida, H., Kozlov, A., Takemoto, Y., Yoshido, S., Fushimi, K., Banks, T. I., Freedman, S. J., Fujikawa, B. K., O'Donnell, T., Winslow, L. A., Berger, B. E., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.. 2015. "Results from KamLAND-Zen". United States. doi:10.1063/1.4915593. https://www.osti.gov/servlets/purl/1213578.
@article{osti_1213578,
title = {Results from KamLAND-Zen},
author = {Asakura, K. and Gando, A. and Gando, Y. and Hachiya, T. and Hayashida, S. and Ikeda, H. and Inoue, K. and Ishidoshiro, K. and Ishikawa, T. and Ishio, S. and Koga, M. and Matsuda, R. and Matsuda, S. and Mitsui, T. and Motoki, D. and Nakamura, K. and Obara, S. and Oki, Y. and Otani, M. and Oura, T. and Shimizu, I. and Shirahata, Y. and Shirai, J. and Suzuki, A. and Tachibana, H. and Tamae, K. and Ueshima, K. and Watanabe, H. and Xu, B. D. and Yamauchi, Y. and Yoshida, H. and Kozlov, A. and Takemoto, Y. and Yoshido, S. and Fushimi, K. and Banks, T. I. and Freedman, S. J. and Fujikawa, B. K. and O'Donnell, T. and Winslow, L. A. and Berger, B. E. and Efremenko, Y. and Karwowski, H. J. and Markoff, D. M. and Tornow, W. and Detwiler, J. A. and Enomoto, S. and Decowski, M. P.},
abstractNote = {KamLAND-Zen reports on a preliminary search for neutrinoless double-beta decay with 136Xe based on 114.8 live-days after the purification of the xenon loaded liquid scintillator. In this data, the problematic 110mAg background peak identified in previous searches is reduced by more than a factor of 10. By combining the KamLAND-Zen pre- and post-purification data, we obtain a preliminary lower limit on the 0νββ decay half-life of T0ν1/2 > 2.6×1025 yr at 90% C.L. The search sensitivity will be enhanced with additional low background data after the purification. As a result, prospects for further improvements with future KamLAND-Zen upgrades are also presented.},
doi = {10.1063/1.4915593},
journal = {AIP Conference Proceedings},
number = ,
volume = 1666,
place = {United States},
year = {2015},
month = {7}
}