Improved search for two-neutrino double electron capture on 124Xe and 126Xe using particle identification in XMASS-I

K. Abe; K. Hiraide; K. Ichimura; Y. Kishimoto; K. Kobayashi; M. Kobayashi; S. Moriyama; M. Nakahata; T. Norita; H. Ogawa; K. Sato; H. Sekiya; O. Takachio; A. Takeda; S. Tasaka; M. Yamashita; B. S. Yang; N. Y. Kim; Y. D. Kim; Y. Itow; K. Kanzawa; R. Kegasa; K. Masuda; H. Takiya; K. Fushimi; G. Kanzaki; K. Martens; Y. Suzuki; B. D. Xu; R. Fujita; K. Hosokawa; K. Miuchi; N. Oka; Y. Takeuchi; Y. H. Kim; K. B. Lee; M. K. Lee; Y. Fukuda; M. Miyasaka; K. Nishijima; S. Nakamura

doi:10.1093/ptep/pty053

Improved search for two-neutrino double electron capture on ¹²⁴Xe and ¹²⁶Xe using particle identification in XMASS-I

K. Abe^*, K. Hiraide, K. Ichimura, Y. Kishimoto, K. Kobayashi, M. Kobayashi, S. Moriyama, M. Nakahata, T. Norita, H. Ogawa, K. Sato, H. Sekiya, O. Takachio, A. Takeda, S. Tasaka, M. Yamashita, B. S. Yang, N. Y. Kim, Y. D. Kim, Y. ItowK. Kanzawa, R. Kegasa, K. Masuda, H. Takiya, K. Fushimi, G. Kanzaki, K. Martens, Y. Suzuki, B. D. Xu, R. Fujita, K. Hosokawa, K. Miuchi, N. Oka, Y. Takeuchi, Y. H. Kim, K. B. Lee, M. K. Lee, Y. Fukuda, M. Miyasaka, K. Nishijima, S. Nakamura

^*Corresponding author for this work

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

15 Citations (Scopus)

Abstract

We conducted an improved search for the simultaneous capture of two K-shell electrons on the ¹²⁴Xe and ¹²⁶Xe nuclei with emission of two neutrinos using 800.0 days of data from the XMASS-I detector. A novel method to discriminate γ -ray/X-ray or double electron capture signals from β-ray background using scintillation time profiles was developed for this search. No significant signal was found when fitting the observed energy spectra with the expected signal and background. Therefore, we set the most stringent lower limits on the half-lives at 2.1 × 10²² and 1.9 × 10²² years for ¹²⁴Xe and ¹²⁶Xe, respectively, with 90% confidence level. These limits improve upon previously reported values by a factor of 4.5.

Original language	English
Article number	pty053
Journal	Progress of Theoretical and Experimental Physics
Volume	2018
Issue number	5
DOIs	https://doi.org/10.1093/ptep/pty053
Publication status	Published - 2018 May 1
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1093/ptep/pty053

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Abe, K., Hiraide, K., Ichimura, K., Kishimoto, Y., Kobayashi, K., Kobayashi, M., Moriyama, S., Nakahata, M., Norita, T., Ogawa, H., Sato, K., Sekiya, H., Takachio, O., Takeda, A., Tasaka, S., Yamashita, M., Yang, B. S., Kim, N. Y., Kim, Y. D., ... Nakamura, S. (2018). Improved search for two-neutrino double electron capture on ¹²⁴Xe and ¹²⁶Xe using particle identification in XMASS-I. Progress of Theoretical and Experimental Physics, 2018(5), Article pty053. https://doi.org/10.1093/ptep/pty053

Abe, K, Hiraide, K, Ichimura, K, Kishimoto, Y, Kobayashi, K, Kobayashi, M, Moriyama, S, Nakahata, M, Norita, T, Ogawa, H, Sato, K, Sekiya, H, Takachio, O, Takeda, A, Tasaka, S, Yamashita, M, Yang, BS, Kim, NY, Kim, YD, Itow, Y, Kanzawa, K, Kegasa, R, Masuda, K, Takiya, H, Fushimi, K, Kanzaki, G, Martens, K, Suzuki, Y, Xu, BD, Fujita, R, Hosokawa, K, Miuchi, K, Oka, N, Takeuchi, Y, Kim, YH, Lee, KB, Lee, MK, Fukuda, Y, Miyasaka, M, Nishijima, K & Nakamura, S 2018, 'Improved search for two-neutrino double electron capture on ¹²⁴Xe and ¹²⁶Xe using particle identification in XMASS-I', Progress of Theoretical and Experimental Physics, vol. 2018, no. 5, pty053. https://doi.org/10.1093/ptep/pty053

@article{414be44f09fb4770b7db28ac47c515b7,

title = "Improved search for two-neutrino double electron capture on 124Xe and 126Xe using particle identification in XMASS-I",

abstract = "We conducted an improved search for the simultaneous capture of two K-shell electrons on the 124Xe and 126Xe nuclei with emission of two neutrinos using 800.0 days of data from the XMASS-I detector. A novel method to discriminate γ -ray/X-ray or double electron capture signals from β-ray background using scintillation time profiles was developed for this search. No significant signal was found when fitting the observed energy spectra with the expected signal and background. Therefore, we set the most stringent lower limits on the half-lives at 2.1 × 1022 and 1.9 × 1022 years for 124Xe and 126Xe, respectively, with 90% confidence level. These limits improve upon previously reported values by a factor of 4.5.",

author = "K. Abe and K. Hiraide and K. Ichimura and Y. Kishimoto and K. Kobayashi and M. Kobayashi and S. Moriyama and M. Nakahata and T. Norita and H. Ogawa and K. Sato and H. Sekiya and O. Takachio and A. Takeda and S. Tasaka and M. Yamashita and Yang, {B. S.} and Kim, {N. Y.} and Kim, {Y. D.} and Y. Itow and K. Kanzawa and R. Kegasa and K. Masuda and H. Takiya and K. Fushimi and G. Kanzaki and K. Martens and Y. Suzuki and Xu, {B. D.} and R. Fujita and K. Hosokawa and K. Miuchi and N. Oka and Y. Takeuchi and Kim, {Y. H.} and Lee, {K. B.} and Lee, {M. K.} and Y. Fukuda and M. Miyasaka and K. Nishijima and S. Nakamura",

note = "Funding Information: We gratefully acknowledge the cooperation of the Kamioka Mining and Smelting Company. This work was supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research (19GS0204, 26104004, and 16H06004), the joint research program of the Institute for Cosmic Ray Research (ICRR), the University of Tokyo, and partially by a National Research Foundation of Korea Grant funded by the Korean Government (NRF-2011-220-C00006). Publisher Copyright: {\textcopyright} The Author(s) 2018.",

year = "2018",

month = may,

day = "1",

doi = "10.1093/ptep/pty053",

language = "English",

volume = "2018",

journal = "Progress of Theoretical and Experimental Physics",

issn = "2050-3911",

publisher = "Oxford University Press",

number = "5",

}

TY - JOUR

T1 - Improved search for two-neutrino double electron capture on 124Xe and 126Xe using particle identification in XMASS-I

AU - Abe, K.

AU - Hiraide, K.

AU - Ichimura, K.

AU - Kishimoto, Y.

AU - Kobayashi, K.

AU - Kobayashi, M.

AU - Moriyama, S.

AU - Nakahata, M.

AU - Norita, T.

AU - Ogawa, H.

AU - Sato, K.

AU - Sekiya, H.

AU - Takachio, O.

AU - Takeda, A.

AU - Tasaka, S.

AU - Yamashita, M.

AU - Yang, B. S.

AU - Kim, N. Y.

AU - Kim, Y. D.

AU - Itow, Y.

AU - Kanzawa, K.

AU - Kegasa, R.

AU - Masuda, K.

AU - Takiya, H.

AU - Fushimi, K.

AU - Kanzaki, G.

AU - Martens, K.

AU - Suzuki, Y.

AU - Xu, B. D.

AU - Fujita, R.

AU - Hosokawa, K.

AU - Miuchi, K.

AU - Oka, N.

AU - Takeuchi, Y.

AU - Kim, Y. H.

AU - Lee, K. B.

AU - Lee, M. K.

AU - Fukuda, Y.

AU - Miyasaka, M.

AU - Nishijima, K.

AU - Nakamura, S.

N1 - Funding Information: We gratefully acknowledge the cooperation of the Kamioka Mining and Smelting Company. This work was supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research (19GS0204, 26104004, and 16H06004), the joint research program of the Institute for Cosmic Ray Research (ICRR), the University of Tokyo, and partially by a National Research Foundation of Korea Grant funded by the Korean Government (NRF-2011-220-C00006). Publisher Copyright: © The Author(s) 2018.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - We conducted an improved search for the simultaneous capture of two K-shell electrons on the 124Xe and 126Xe nuclei with emission of two neutrinos using 800.0 days of data from the XMASS-I detector. A novel method to discriminate γ -ray/X-ray or double electron capture signals from β-ray background using scintillation time profiles was developed for this search. No significant signal was found when fitting the observed energy spectra with the expected signal and background. Therefore, we set the most stringent lower limits on the half-lives at 2.1 × 1022 and 1.9 × 1022 years for 124Xe and 126Xe, respectively, with 90% confidence level. These limits improve upon previously reported values by a factor of 4.5.

AB - We conducted an improved search for the simultaneous capture of two K-shell electrons on the 124Xe and 126Xe nuclei with emission of two neutrinos using 800.0 days of data from the XMASS-I detector. A novel method to discriminate γ -ray/X-ray or double electron capture signals from β-ray background using scintillation time profiles was developed for this search. No significant signal was found when fitting the observed energy spectra with the expected signal and background. Therefore, we set the most stringent lower limits on the half-lives at 2.1 × 1022 and 1.9 × 1022 years for 124Xe and 126Xe, respectively, with 90% confidence level. These limits improve upon previously reported values by a factor of 4.5.

UR - http://www.scopus.com/inward/record.url?scp=85068254551&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068254551&partnerID=8YFLogxK

U2 - 10.1093/ptep/pty053

DO - 10.1093/ptep/pty053

M3 - Article

AN - SCOPUS:85068254551

SN - 2050-3911

VL - 2018

JO - Progress of Theoretical and Experimental Physics

JF - Progress of Theoretical and Experimental Physics

IS - 5

M1 - pty053

ER -

Improved search for two-neutrino double electron capture on ¹²⁴Xe and ¹²⁶Xe using particle identification in XMASS-I

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