Physics Letters B (Aug 2016)
Search for two-neutrino double electron capture on 124Xe with the XMASS-I detector
- K. Abe,
- K. Hiraide,
- K. Ichimura,
- Y. Kishimoto,
- K. Kobayashi,
- M. Kobayashi,
- S. Moriyama,
- K. Nakagawa,
- M. Nakahata,
- T. Norita,
- H. Ogawa,
- H. Sekiya,
- O. Takachio,
- A. Takeda,
- M. Yamashita,
- B.S. Yang,
- N.Y. Kim,
- Y.D. Kim,
- S. Tasaka,
- J. Liu,
- K. Martens,
- Y. Suzuki,
- R. Fujita,
- K. Hosokawa,
- K. Miuchi,
- N. Oka,
- Y. Onishi,
- Y. Takeuchi,
- Y.H. Kim,
- J.S. Lee,
- K.B. Lee,
- M.K. Lee,
- Y. Fukuda,
- Y. Itow,
- R. Kegasa,
- K. Kobayashi,
- K. Masuda,
- H. Takiya,
- H. Uchida,
- K. Nishijima,
- K. Fujii,
- I. Murayama,
- S. Nakamura
Affiliations
- K. Abe
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- K. Hiraide
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- K. Ichimura
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- Y. Kishimoto
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- K. Kobayashi
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- M. Kobayashi
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- S. Moriyama
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- K. Nakagawa
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- M. Nakahata
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- T. Norita
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- H. Ogawa
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- H. Sekiya
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- O. Takachio
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- A. Takeda
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- M. Yamashita
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- B.S. Yang
- Kamioka Observatory, Institute for Cosmic Ray Research, the University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
- N.Y. Kim
- Center of Underground Physics, Institute for Basic Science, 70 Yuseong-daero 1689-gil, Yuseong-gu, Daejeon 305-811, South Korea
- Y.D. Kim
- Center of Underground Physics, Institute for Basic Science, 70 Yuseong-daero 1689-gil, Yuseong-gu, Daejeon 305-811, South Korea
- S. Tasaka
- Information and Multimedia Center, Gifu University, Gifu 501-1193, Japan
- J. Liu
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), the University of Tokyo, Kashiwa, Chiba 277-8582, Japan
- K. Martens
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), the University of Tokyo, Kashiwa, Chiba 277-8582, Japan
- Y. Suzuki
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), the University of Tokyo, Kashiwa, Chiba 277-8582, Japan
- R. Fujita
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
- K. Hosokawa
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
- K. Miuchi
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
- N. Oka
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
- Y. Onishi
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
- Y. Takeuchi
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
- Y.H. Kim
- Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea
- J.S. Lee
- Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea
- K.B. Lee
- Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea
- M.K. Lee
- Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea
- Y. Fukuda
- Department of Physics, Miyagi University of Education, Sendai, Miyagi 980-0845, Japan
- Y. Itow
- Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan
- R. Kegasa
- Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan
- K. Kobayashi
- Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan
- K. Masuda
- Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan
- H. Takiya
- Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan
- H. Uchida
- Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan
- K. Nishijima
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
- K. Fujii
- Department of Physics, Faculty of Engineering, Yokohama National University, Yokohama, Kanagawa 240-8501, Japan
- I. Murayama
- Department of Physics, Faculty of Engineering, Yokohama National University, Yokohama, Kanagawa 240-8501, Japan
- S. Nakamura
- Department of Physics, Faculty of Engineering, Yokohama National University, Yokohama, Kanagawa 240-8501, Japan
- DOI
- https://doi.org/10.1016/j.physletb.2016.05.039
- Journal volume & issue
-
Vol. 759,
no. C
pp. 64 – 68
Abstract
Double electron capture is a rare nuclear decay process in which two orbital electrons are captured simultaneously in the same nucleus. Measurement of its two-neutrino mode would provide a new reference for the calculation of nuclear matrix elements whereas observation of its neutrinoless mode would demonstrate lepton number violation. A search for two-neutrino double electron capture on 124Xe is performed using 165.9 days of data collected with the XMASS-I liquid xenon detector. No significant excess above background was observed and we set a lower limit on the half-life as 4.7×1021 years at 90% confidence level. The obtained limit has ruled out parts of some theoretical expectations. We obtain a lower limit on the 126Xe two-neutrino double electron capture half-life of 4.3×1021 years at 90% confidence level as well.
Keywords
