Search for double-beta decay of 136Xe to excited states of 136Ba with the KamLAND-Zen experiment

K. Asakura; A. Gando; Y. Gando; T. Hachiya; S. Hayashida; H. Ikeda; K. Inoue; K. Ishidoshiro; T. Ishikawa; S. Ishio; M. Koga; S. Matsuda; T. Mitsui; D. Motoki; K. Nakamura; S. Obara; M. Otani; T. Oura; I. Shimizu; Y. Shirahata; J. Shirai; A. Suzuki; H. Tachibana; K. Tamae; K. Ueshima; H. Watanabe; B. D. Xu; H. Yoshida; A. Kozlov; Y. Takemoto; S. Yoshida; K. Fushimi; T. I. Banks; B. E. Berger; B. K. Fujikawa; T. O'Donnell; L. A. Winslow; Y. Efremenko; H. J. Karwowski; D. M. Markoff; W. Tornow; J. A. Detwiler; S. Enomoto; M. P. Decowski

doi:10.1016/j.nuclphysa.2015.11.011

Search for double-beta decay of ¹³⁶Xe to excited states of ¹³⁶Ba with the KamLAND-Zen experiment

K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, S. Obara, M. Otani, T. Oura, I. Shimizu, Y. ShirahataJ. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

A search for double-beta decays of ¹³⁶Xe to excited states of ¹³⁶Ba has been performed with the first phase data set of the KamLAND-Zen experiment. The 0₁⁺, 2₁⁺ and 2₂⁺ transitions of 0νββ decay were evaluated in an exposure of 89.5 kg⋅yr of ¹³⁶Xe, while the same transitions of 2νββ decay were evaluated in an exposure of 61.8 kg⋅yr. No excess over background was found for all decay modes. The lower half-life limits of the 2₁⁺ state transitions of 0νββ and 2νββ decay were improved to T1/20ν(0⁺→2₁⁺)>2.6×10²⁵ yr and T_1/2^2ν(0⁺→2₁⁺)>4.6×10²³ yr (90% C.L.), respectively. We report on the first experimental lower half-life limits for the transitions to the 0₁⁺ state of ¹³⁶Xe for 0νββ and 2νββ decay. They are T_1/2^0ν(0⁺→0₁⁺)>2.4×1025 yr and T_1/2^2ν(0⁺→0₁⁺)>8.3×1023 yr (90% C.L.). The transitions to the 2₂⁺ states are also evaluated for the first time to be T_1/2^0ν(0⁺→2₂⁺)>2.6×10²⁵ yr and T_1/2^2ν(0⁺→2₂⁺)>9.0×10²³ yr (90% C.L.). These results are compared to recent theoretical predictions.

Original language	English (US)
Pages (from-to)	171-181
Number of pages	11
Journal	Nuclear Physics A
Volume	946
DOIs	https://doi.org/10.1016/j.nuclphysa.2015.11.011
State	Published - Feb 1 2016
Externally published	Yes

Keywords

Double-beta decay
Excited state
Xe

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.nuclphysa.2015.11.011

Cite this

Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, T., Ishio, S., Koga, M., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Obara, S., Otani, M., Oura, T., Shimizu, I., ... Decowski, M. P. (2016). Search for double-beta decay of ¹³⁶Xe to excited states of ¹³⁶Ba with the KamLAND-Zen experiment. Nuclear Physics A, 946, 171-181. https://doi.org/10.1016/j.nuclphysa.2015.11.011

Asakura, K, Gando, A, Gando, Y, Hachiya, T, Hayashida, S, Ikeda, H, Inoue, K, Ishidoshiro, K, Ishikawa, T, Ishio, S, Koga, M, Matsuda, S, Mitsui, T, Motoki, D, Nakamura, K, Obara, S, Otani, M, Oura, T, Shimizu, I, Shirahata, Y, Shirai, J, Suzuki, A, Tachibana, H, Tamae, K, Ueshima, K, Watanabe, H, Xu, BD, Yoshida, 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 2016, 'Search for double-beta decay of ¹³⁶Xe to excited states of ¹³⁶Ba with the KamLAND-Zen experiment', Nuclear Physics A, vol. 946, pp. 171-181. https://doi.org/10.1016/j.nuclphysa.2015.11.011

@article{c4a3ab87c11b4ee699454d29cdb12305,

title = "Search for double-beta decay of 136Xe to excited states of 136Ba with the KamLAND-Zen experiment",

abstract = "A search for double-beta decays of 136Xe to excited states of 136Ba has been performed with the first phase data set of the KamLAND-Zen experiment. The 01+, 21+ and 22+ transitions of 0νββ decay were evaluated in an exposure of 89.5 kg⋅yr of 136Xe, while the same transitions of 2νββ decay were evaluated in an exposure of 61.8 kg⋅yr. No excess over background was found for all decay modes. The lower half-life limits of the 21+ state transitions of 0νββ and 2νββ decay were improved to T1/20ν(0+→21+)>2.6×1025 yr and T1/22ν(0+→21+)>4.6×1023 yr (90% C.L.), respectively. We report on the first experimental lower half-life limits for the transitions to the 01+ state of 136Xe for 0νββ and 2νββ decay. They are T1/20ν(0+→01+)>2.4×1025 yr and T1/22ν(0+→01+)>8.3×1023 yr (90% C.L.). The transitions to the 22+ states are also evaluated for the first time to be T1/20ν(0+→22+)>2.6×1025 yr and T1/22ν(0+→22+)>9.0×1023 yr (90% C.L.). These results are compared to recent theoretical predictions.",

keywords = "Double-beta decay, Excited state, Xe",

author = "K. Asakura and A. Gando and Y. Gando and T. Hachiya and S. Hayashida and H. Ikeda and K. Inoue and K. Ishidoshiro and T. Ishikawa and S. Ishio and M. Koga and S. Matsuda and T. Mitsui and D. Motoki and K. Nakamura and S. Obara and M. Otani and T. Oura and I. Shimizu and Y. Shirahata and J. Shirai and A. Suzuki and H. Tachibana and K. Tamae and K. Ueshima and H. Watanabe and Xu, {B. D.} and H. Yoshida and A. Kozlov and Y. Takemoto and S. Yoshida and K. Fushimi and Banks, {T. I.} and Berger, {B. E.} and Fujikawa, {B. K.} and T. O'Donnell and Winslow, {L. A.} and Y. Efremenko and Karwowski, {H. J.} and Markoff, {D. M.} and W. Tornow and Detwiler, {J. A.} and S. Enomoto and Decowski, {M. P.}",

note = "Funding Information: The KamLAND-Zen experiment is supported by JSPS KAKENHI Grant Numbers 21000001 and 26104002 ; Stichting FOM in the Netherlands; and under the U.S. Department of Energy (DOE) Grant No. DE-AC02-05CH11231 , as well as other DOE and NSF grants to individual institutions. The Kamioka Mining and Smelting Company has provided service for activities in the mine. We acknowledge the support of NII for SINET4. Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2016",

month = feb,

day = "1",

doi = "10.1016/j.nuclphysa.2015.11.011",

language = "English (US)",

volume = "946",

pages = "171--181",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

}

TY - JOUR

T1 - Search for double-beta decay of 136Xe to excited states of 136Ba with the KamLAND-Zen experiment

AU - Asakura, K.

AU - Gando, A.

AU - Gando, Y.

AU - Hachiya, T.

AU - Hayashida, S.

AU - Ikeda, H.

AU - Inoue, K.

AU - Ishidoshiro, K.

AU - Ishikawa, T.

AU - Ishio, S.

AU - Koga, M.

AU - Matsuda, S.

AU - Mitsui, T.

AU - Motoki, D.

AU - Nakamura, K.

AU - Obara, S.

AU - Otani, M.

AU - Oura, T.

AU - Shimizu, I.

AU - Shirahata, Y.

AU - Shirai, J.

AU - Suzuki, A.

AU - Tachibana, H.

AU - Tamae, K.

AU - Ueshima, K.

AU - Watanabe, H.

AU - Xu, B. D.

AU - Yoshida, H.

AU - Kozlov, A.

AU - Takemoto, Y.

AU - Yoshida, S.

AU - Fushimi, K.

AU - Banks, T. I.

AU - Berger, B. E.

AU - Fujikawa, B. K.

AU - O'Donnell, T.

AU - Winslow, L. A.

AU - Efremenko, Y.

AU - Karwowski, H. J.

AU - Markoff, D. M.

AU - Tornow, W.

AU - Detwiler, J. A.

AU - Enomoto, S.

AU - Decowski, M. P.

N1 - Funding Information: The KamLAND-Zen experiment is supported by JSPS KAKENHI Grant Numbers 21000001 and 26104002 ; Stichting FOM in the Netherlands; and under the U.S. Department of Energy (DOE) Grant No. DE-AC02-05CH11231 , as well as other DOE and NSF grants to individual institutions. The Kamioka Mining and Smelting Company has provided service for activities in the mine. We acknowledge the support of NII for SINET4. Publisher Copyright: © 2015 Elsevier B.V.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - A search for double-beta decays of 136Xe to excited states of 136Ba has been performed with the first phase data set of the KamLAND-Zen experiment. The 01+, 21+ and 22+ transitions of 0νββ decay were evaluated in an exposure of 89.5 kg⋅yr of 136Xe, while the same transitions of 2νββ decay were evaluated in an exposure of 61.8 kg⋅yr. No excess over background was found for all decay modes. The lower half-life limits of the 21+ state transitions of 0νββ and 2νββ decay were improved to T1/20ν(0+→21+)>2.6×1025 yr and T1/22ν(0+→21+)>4.6×1023 yr (90% C.L.), respectively. We report on the first experimental lower half-life limits for the transitions to the 01+ state of 136Xe for 0νββ and 2νββ decay. They are T1/20ν(0+→01+)>2.4×1025 yr and T1/22ν(0+→01+)>8.3×1023 yr (90% C.L.). The transitions to the 22+ states are also evaluated for the first time to be T1/20ν(0+→22+)>2.6×1025 yr and T1/22ν(0+→22+)>9.0×1023 yr (90% C.L.). These results are compared to recent theoretical predictions.

AB - A search for double-beta decays of 136Xe to excited states of 136Ba has been performed with the first phase data set of the KamLAND-Zen experiment. The 01+, 21+ and 22+ transitions of 0νββ decay were evaluated in an exposure of 89.5 kg⋅yr of 136Xe, while the same transitions of 2νββ decay were evaluated in an exposure of 61.8 kg⋅yr. No excess over background was found for all decay modes. The lower half-life limits of the 21+ state transitions of 0νββ and 2νββ decay were improved to T1/20ν(0+→21+)>2.6×1025 yr and T1/22ν(0+→21+)>4.6×1023 yr (90% C.L.), respectively. We report on the first experimental lower half-life limits for the transitions to the 01+ state of 136Xe for 0νββ and 2νββ decay. They are T1/20ν(0+→01+)>2.4×1025 yr and T1/22ν(0+→01+)>8.3×1023 yr (90% C.L.). The transitions to the 22+ states are also evaluated for the first time to be T1/20ν(0+→22+)>2.6×1025 yr and T1/22ν(0+→22+)>9.0×1023 yr (90% C.L.). These results are compared to recent theoretical predictions.

KW - Double-beta decay

KW - Excited state

KW - Xe

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U2 - 10.1016/j.nuclphysa.2015.11.011

DO - 10.1016/j.nuclphysa.2015.11.011

M3 - Article

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SN - 0375-9474

VL - 946

SP - 171

EP - 181

JO - Nuclear Physics A

JF - Nuclear Physics A

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