Limits on Majoron-emitting double-β decays of 136Xe in the KamLAND-Zen experiment

A. Gando; Y. Gando; H. Hanakago; H. Ikeda; K. Inoue; R. Kato; M. Koga; S. Matsuda; T. Mitsui; T. Nakada; K. Nakamura; A. Obata; A. Oki; Y. Ono; I. Shimizu; J. Shirai; A. Suzuki; Y. Takemoto; K. Tamae; K. Ueshima; H. Watanabe; B. D. Xu; S. Yamada; H. Yoshida; A. Kozlov; S. Yoshida; T. I. Banks; J. A. Detwiler; S. J. Freedman; B. K. Fujikawa; K. Han; T. O'Donnell; B. E. Berger; Y. Efremenko; H. J. Karwowski; D. M. Markoff; W. Tornow; S. Enomoto; M. P. Decowski

doi:10.1103/PhysRevC.86.021601

Limits on Majoron-emitting double-β decays of 136Xe in the KamLAND-Zen experiment

A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue, R. Kato, M. Koga, S. Matsuda, T. Mitsui, T. Nakada, K. Nakamura, A. Obata, A. Oki, Y. Ono, I. Shimizu, J. Shirai, A. Suzuki, Y. Takemoto, K. Tamae, K. UeshimaH. Watanabe, B. D. Xu, S. Yamada, H. Yoshida, A. Kozlov, S. Yoshida, T. I. Banks, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K. Han, T. O'Donnell, B. E. Berger, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Enomoto, M. P. Decowski

Research Center for Neutrino Science (RCNS)

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92 Citations (Scopus)

Abstract

We present limits on Majoron-emitting neutrinoless double-β decay modes based on an exposure of 112.3 days with 125 kg of 136Xe. In particular, a lower limit on the ordinary (spectral index n=1) Majoron-emitting decay half-life of 136Xe is obtained as T1/20νχ0>2.6×1024 yr at 90% C.L., a factor of five more stringent than previous limits. The corresponding upper limit on the effective Majoron-neutrino coupling, using a range of available nuclear matrix calculations, is g_ee<(0.8-1.6) ×10^-5. This excludes a previously unconstrained region of parameter space and strongly limits the possible contribution of ordinary Majoron emission modes to 0νββ decay for neutrino masses in the inverted hierarchy scheme.

Original language	English
Article number	021601
Journal	Physical Review C - Nuclear Physics
Volume	86
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.86.021601
Publication status	Published - 2012 Aug 6

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Gando, A., Gando, Y., Hanakago, H., Ikeda, H., Inoue, K., Kato, R., Koga, M., Matsuda, S., Mitsui, T., Nakada, T., Nakamura, K., Obata, A., Oki, A., Ono, Y., Shimizu, I., Shirai, J., Suzuki, A., Takemoto, Y., Tamae, K., ... Decowski, M. P. (2012). Limits on Majoron-emitting double-β decays of 136Xe in the KamLAND-Zen experiment. Physical Review C - Nuclear Physics, 86(2), Article 021601. https://doi.org/10.1103/PhysRevC.86.021601

@article{faf8b65fc351446fa8e8ffc169a8ff11,

title = "Limits on Majoron-emitting double-β decays of 136Xe in the KamLAND-Zen experiment",

abstract = "We present limits on Majoron-emitting neutrinoless double-β decay modes based on an exposure of 112.3 days with 125 kg of 136Xe. In particular, a lower limit on the ordinary (spectral index n=1) Majoron-emitting decay half-life of 136Xe is obtained as T1/20νχ0>2.6×1024 yr at 90% C.L., a factor of five more stringent than previous limits. The corresponding upper limit on the effective Majoron-neutrino coupling, using a range of available nuclear matrix calculations, is gee<(0.8-1.6) ×10-5. This excludes a previously unconstrained region of parameter space and strongly limits the possible contribution of ordinary Majoron emission modes to 0νββ decay for neutrino masses in the inverted hierarchy scheme.",

author = "A. Gando and Y. Gando and H. Hanakago and H. Ikeda and K. Inoue and R. Kato and M. Koga and S. Matsuda and T. Mitsui and T. Nakada and K. Nakamura and A. Obata and A. Oki and Y. Ono and I. Shimizu and J. Shirai and A. Suzuki and Y. Takemoto and K. Tamae and K. Ueshima and H. Watanabe and Xu, {B. D.} and S. Yamada and H. Yoshida and A. Kozlov and S. Yoshida and Banks, {T. I.} and Detwiler, {J. A.} and Freedman, {S. J.} and Fujikawa, {B. K.} and K. Han and T. O'Donnell and Berger, {B. E.} and Y. Efremenko and Karwowski, {H. J.} and Markoff, {D. M.} and W. Tornow and S. Enomoto and Decowski, {M. P.}",

year = "2012",

month = aug,

day = "6",

doi = "10.1103/PhysRevC.86.021601",

language = "English",

volume = "86",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

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Gando, A, Gando, Y, Hanakago, H, Ikeda, H , Inoue, K, Kato, R, Koga, M, Matsuda, S, Mitsui, T, Nakada, T, Nakamura, K, Obata, A, Oki, A, Ono, Y, Shimizu, I, Shirai, J, Suzuki, A, Takemoto, Y, Tamae, K, Ueshima, K, Watanabe, H, Xu, BD, Yamada, S, Yoshida, H, Kozlov, A, Yoshida, S, Banks, TI, Detwiler, JA, Freedman, SJ, Fujikawa, BK, Han, K, O'Donnell, T, Berger, BE, Efremenko, Y, Karwowski, HJ, Markoff, DM, Tornow, W, Enomoto, S & Decowski, MP 2012, 'Limits on Majoron-emitting double-β decays of 136Xe in the KamLAND-Zen experiment', Physical Review C - Nuclear Physics, vol. 86, no. 2, 021601. https://doi.org/10.1103/PhysRevC.86.021601

TY - JOUR

T1 - Limits on Majoron-emitting double-β decays of 136Xe in the KamLAND-Zen experiment

AU - Gando, A.

AU - Gando, Y.

AU - Hanakago, H.

AU - Ikeda, H.

AU - Inoue, K.

AU - Kato, R.

AU - Koga, M.

AU - Matsuda, S.

AU - Mitsui, T.

AU - Nakada, T.

AU - Nakamura, K.

AU - Obata, A.

AU - Oki, A.

AU - Ono, Y.

AU - Shimizu, I.

AU - Shirai, J.

AU - Suzuki, A.

AU - Takemoto, Y.

AU - Tamae, K.

AU - Ueshima, K.

AU - Watanabe, H.

AU - Xu, B. D.

AU - Yamada, S.

AU - Yoshida, H.

AU - Kozlov, A.

AU - Yoshida, S.

AU - Banks, T. I.

AU - Detwiler, J. A.

AU - Freedman, S. J.

AU - Fujikawa, B. K.

AU - Han, K.

AU - O'Donnell, T.

AU - Berger, B. E.

AU - Efremenko, Y.

AU - Karwowski, H. J.

AU - Markoff, D. M.

AU - Tornow, W.

AU - Enomoto, S.

AU - Decowski, M. P.

PY - 2012/8/6

Y1 - 2012/8/6

N2 - We present limits on Majoron-emitting neutrinoless double-β decay modes based on an exposure of 112.3 days with 125 kg of 136Xe. In particular, a lower limit on the ordinary (spectral index n=1) Majoron-emitting decay half-life of 136Xe is obtained as T1/20νχ0>2.6×1024 yr at 90% C.L., a factor of five more stringent than previous limits. The corresponding upper limit on the effective Majoron-neutrino coupling, using a range of available nuclear matrix calculations, is gee<(0.8-1.6) ×10-5. This excludes a previously unconstrained region of parameter space and strongly limits the possible contribution of ordinary Majoron emission modes to 0νββ decay for neutrino masses in the inverted hierarchy scheme.

AB - We present limits on Majoron-emitting neutrinoless double-β decay modes based on an exposure of 112.3 days with 125 kg of 136Xe. In particular, a lower limit on the ordinary (spectral index n=1) Majoron-emitting decay half-life of 136Xe is obtained as T1/20νχ0>2.6×1024 yr at 90% C.L., a factor of five more stringent than previous limits. The corresponding upper limit on the effective Majoron-neutrino coupling, using a range of available nuclear matrix calculations, is gee<(0.8-1.6) ×10-5. This excludes a previously unconstrained region of parameter space and strongly limits the possible contribution of ordinary Majoron emission modes to 0νββ decay for neutrino masses in the inverted hierarchy scheme.

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U2 - 10.1103/PhysRevC.86.021601

DO - 10.1103/PhysRevC.86.021601

M3 - Article

AN - SCOPUS:84864597508

SN - 0556-2813

VL - 86

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 2

M1 - 021601

ER -

Limits on Majoron-emitting double-β decays of 136Xe in the KamLAND-Zen experiment

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