Limits on Astrophysical Antineutrinos with the KamLAND Experiment

S. Abe; S. Asami; A. Gando; Y. Gando; T. Gima; A. Goto; T. Hachiya; K. Hata; S. Hayashida; K. Hosokawa; K. Ichimura; S. Ieki; H. Ikeda; K. Inoue; K. Ishidoshiro; Y. Kamei; N. Kawada; Y. Kishimoto; T. Kinoshita; M. Koga; N. Maemura; T. Mitsui; H. Miyake; K. Nakamura; Kengo Nakamura; R. Nakamura; H. Ozaki; T. Sakai; H. Sambonsugi; I. Shimizu; Y. Shirahata; J. Shirai; K. Shiraishi; A. Suzuki; Y. Suzuki; A. Takeuchi; K. Tamae; K. Ueshima; Y. Wada; H. Watanabe; Y. Yoshida; S. Obara; A. K. Ichikawa; A. Kozlov; D. Chernyak; Y. Takemoto; S. Yoshida; S. Umehara; K. Fushimi; S. Hirata; K. Z. Nakamura; M. Yoshida; B. E. Berger; B. K. Fujikawa; J. G. Learned; J. Maricic; S. N. Axani; L. A. Winslow; Z. Fu; J. Ouellet; Y. Efremenko; H. J. Karwowski; D. M. Markoff; W. Tornow; A. Li; J. A. Detwiler; S. Enomoto; M. P. Decowski; C. Grant; T. O'Donnell; S. Dell'Oro

doi:10.3847/1538-4357/ac32c1

Limits on Astrophysical Antineutrinos with the KamLAND Experiment

S. Abe, S. Asami, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, S. Hayashida, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. KogaN. Maemura, T. Mitsui, H. Miyake, K. Nakamura, Kengo Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, Y. Shirahata, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, Y. Wada, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, A. Kozlov, D. Chernyak, Y. Takemoto, S. Yoshida, S. Umehara, K. Fushimi, S. Hirata, K. Z. Nakamura, M. Yoshida, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, T. O'Donnell, S. Dell'Oro

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Abstract

We report on a search for electron antineutrinos ( ) from astrophysical sources in the neutrino energy range 8.3-30.8 MeV with the KamLAND detector. In an exposure of 6.72 kton-year of the liquid scintillator, we observe 18 candidate events via the inverse beta decay reaction. Although there is a large background uncertainty from neutral current atmospheric neutrino interactions, we find no significant excess over background model predictions. Assuming several supernova relic neutrino spectra, we give upper flux limits of 60-110 cm-2 s-1 (90% confidence level, CL) in the analysis range and present a model-independent flux. We also set limits on the annihilation rates for light dark matter pairs to neutrino pairs. These data improve on the upper probability limit of 8B solar neutrinos converting into , (90% CL) assuming an undistorted shape. This corresponds to a solar flux of 60 cm-2 s-1 (90% CL) in the analysis energy range.

Original language	English
Article number	14
Journal	Astrophysical Journal
Volume	925
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/ac32c1
Publication status	Published - 2022 Jan 20

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/ac32c1

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Abe, S., Asami, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hayashida, S., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Kinoshita, T., ... Dell'Oro, S. (2022). Limits on Astrophysical Antineutrinos with the KamLAND Experiment. Astrophysical Journal, 925(1), [14]. https://doi.org/10.3847/1538-4357/ac32c1

Abe, S, Asami, S, Gando, A, Gando, Y, Gima, T, Goto, A, Hachiya, T, Hata, K, Hayashida, S, Hosokawa, K, Ichimura, K , Ieki, S , Ikeda, H , Inoue, K , Ishidoshiro, K, Kamei, Y, Kawada, N, Kishimoto, Y, Kinoshita, T, Koga, M, Maemura, N, Mitsui, T, Miyake, H, Nakamura, K, Nakamura, K, Nakamura, R, Ozaki, H, Sakai, T, Sambonsugi, H, Shimizu, I, Shirahata, Y, Shirai, J, Shiraishi, K, Suzuki, A, Suzuki, Y, Takeuchi, A, Tamae, K, Ueshima, K, Wada, Y, Watanabe, H, Yoshida, Y, Obara, S, Ichikawa, AK, Kozlov, A, Chernyak, D, Takemoto, Y, Yoshida, S, Umehara, S, Fushimi, K, Hirata, S, Nakamura, KZ, Yoshida, M, Berger, BE, Fujikawa, BK, Learned, JG, Maricic, J, Axani, SN, Winslow, LA, Fu, Z, Ouellet, J, Efremenko, Y, Karwowski, HJ, Markoff, DM, Tornow, W, Li, A, Detwiler, JA, Enomoto, S, Decowski, MP, Grant, C, O'Donnell, T & Dell'Oro, S 2022, 'Limits on Astrophysical Antineutrinos with the KamLAND Experiment', Astrophysical Journal, vol. 925, no. 1, 14. https://doi.org/10.3847/1538-4357/ac32c1

@article{f6f05c1ebb2746299cc2cff793280dfc,

title = "Limits on Astrophysical Antineutrinos with the KamLAND Experiment",

abstract = "We report on a search for electron antineutrinos ( ) from astrophysical sources in the neutrino energy range 8.3-30.8 MeV with the KamLAND detector. In an exposure of 6.72 kton-year of the liquid scintillator, we observe 18 candidate events via the inverse beta decay reaction. Although there is a large background uncertainty from neutral current atmospheric neutrino interactions, we find no significant excess over background model predictions. Assuming several supernova relic neutrino spectra, we give upper flux limits of 60-110 cm-2 s-1 (90% confidence level, CL) in the analysis range and present a model-independent flux. We also set limits on the annihilation rates for light dark matter pairs to neutrino pairs. These data improve on the upper probability limit of 8B solar neutrinos converting into , (90% CL) assuming an undistorted shape. This corresponds to a solar flux of 60 cm-2 s-1 (90% CL) in the analysis energy range.",

author = "S. Abe and S. Asami and A. Gando and Y. Gando and T. Gima and A. Goto and T. Hachiya and K. Hata and S. Hayashida and K. Hosokawa and K. Ichimura and S. Ieki and H. Ikeda and K. Inoue and K. Ishidoshiro and Y. Kamei and N. Kawada and Y. Kishimoto and T. Kinoshita and M. Koga and N. Maemura and T. Mitsui and H. Miyake and K. Nakamura and Kengo Nakamura and R. Nakamura and H. Ozaki and T. Sakai and H. Sambonsugi and I. Shimizu and Y. Shirahata and J. Shirai and K. Shiraishi and A. Suzuki and Y. Suzuki and A. Takeuchi and K. Tamae and K. Ueshima and Y. Wada and H. Watanabe and Y. Yoshida and S. Obara and Ichikawa, {A. K.} and A. Kozlov and D. Chernyak and Y. Takemoto and S. Yoshida and S. Umehara and K. Fushimi and S. Hirata and Nakamura, {K. Z.} and M. Yoshida and Berger, {B. E.} and Fujikawa, {B. K.} and Learned, {J. G.} and J. Maricic and Axani, {S. N.} and Winslow, {L. A.} and Z. Fu and J. Ouellet and Y. Efremenko and Karwowski, {H. J.} and Markoff, {D. M.} and W. Tornow and A. Li and Detwiler, {J. A.} and S. Enomoto and Decowski, {M. P.} and C. Grant and T. O'Donnell and S. Dell'Oro",

note = "Funding Information: Original content from this work may be used under the terms of the . Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. MEXT ∣ Japan Society for the Promotion of Science (JSPS) https://doi.org/10.13039/501100001691 18J10498 MEXT ∣ Japan Society for the Promotion of Science (JSPS) https://doi.org/10.13039/501100001691 19H05102 MEXT ∣ Japan Society for the Promotion of Science (JSPS) https://doi.org/10.13039/501100001691 19H05803 U.S. Department of Energy (DOE) https://doi.org/10.13039/100000015 DE-AC02-05CH11231 National Science Foundation (NSF) https://doi.org/10.13039/100000001 NSF-1806440 National Science Foundation (NSF) https://doi.org/10.13039/100000001 NSF-2012964 yes � 2022. The Author(s). Published by the American Astronomical Society. Creative Commons Attribution 4.0 licence Publisher Copyright: {\textcopyright} 2022. The Author(s). Published by the American Astronomical Society..",

year = "2022",

month = jan,

day = "20",

doi = "10.3847/1538-4357/ac32c1",

language = "English",

volume = "925",

journal = "Astrophysical Journal",

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TY - JOUR

T1 - Limits on Astrophysical Antineutrinos with the KamLAND Experiment

AU - Abe, S.

AU - Asami, S.

AU - Gando, A.

AU - Gando, Y.

AU - Gima, T.

AU - Goto, A.

AU - Hachiya, T.

AU - Hata, K.

AU - Hayashida, S.

AU - Hosokawa, K.

AU - Ichimura, K.

AU - Ieki, S.

AU - Ikeda, H.

AU - Inoue, K.

AU - Ishidoshiro, K.

AU - Kamei, Y.

AU - Kawada, N.

AU - Kishimoto, Y.

AU - Kinoshita, T.

AU - Koga, M.

AU - Maemura, N.

AU - Mitsui, T.

AU - Miyake, H.

AU - Nakamura, K.

AU - Nakamura, Kengo

AU - Nakamura, R.

AU - Ozaki, H.

AU - Sakai, T.

AU - Sambonsugi, H.

AU - Shimizu, I.

AU - Shirahata, Y.

AU - Shirai, J.

AU - Shiraishi, K.

AU - Suzuki, A.

AU - Suzuki, Y.

AU - Takeuchi, A.

AU - Tamae, K.

AU - Ueshima, K.

AU - Wada, Y.

AU - Watanabe, H.

AU - Yoshida, Y.

AU - Obara, S.

AU - Ichikawa, A. K.

AU - Kozlov, A.

AU - Chernyak, D.

AU - Takemoto, Y.

AU - Yoshida, S.

AU - Umehara, S.

AU - Fushimi, K.

AU - Hirata, S.

AU - Nakamura, K. Z.

AU - Yoshida, M.

AU - Berger, B. E.

AU - Fujikawa, B. K.

AU - Learned, J. G.

AU - Maricic, J.

AU - Axani, S. N.

AU - Winslow, L. A.

AU - Fu, Z.

AU - Ouellet, J.

AU - Efremenko, Y.

AU - Karwowski, H. J.

AU - Markoff, D. M.

AU - Tornow, W.

AU - Li, A.

AU - Detwiler, J. A.

AU - Enomoto, S.

AU - Decowski, M. P.

AU - Grant, C.

AU - O'Donnell, T.

AU - Dell'Oro, S.

N1 - Funding Information: Original content from this work may be used under the terms of the . Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. MEXT ∣ Japan Society for the Promotion of Science (JSPS) https://doi.org/10.13039/501100001691 18J10498 MEXT ∣ Japan Society for the Promotion of Science (JSPS) https://doi.org/10.13039/501100001691 19H05102 MEXT ∣ Japan Society for the Promotion of Science (JSPS) https://doi.org/10.13039/501100001691 19H05803 U.S. Department of Energy (DOE) https://doi.org/10.13039/100000015 DE-AC02-05CH11231 National Science Foundation (NSF) https://doi.org/10.13039/100000001 NSF-1806440 National Science Foundation (NSF) https://doi.org/10.13039/100000001 NSF-2012964 yes � 2022. The Author(s). Published by the American Astronomical Society. Creative Commons Attribution 4.0 licence Publisher Copyright: © 2022. The Author(s). Published by the American Astronomical Society..

PY - 2022/1/20

Y1 - 2022/1/20

N2 - We report on a search for electron antineutrinos ( ) from astrophysical sources in the neutrino energy range 8.3-30.8 MeV with the KamLAND detector. In an exposure of 6.72 kton-year of the liquid scintillator, we observe 18 candidate events via the inverse beta decay reaction. Although there is a large background uncertainty from neutral current atmospheric neutrino interactions, we find no significant excess over background model predictions. Assuming several supernova relic neutrino spectra, we give upper flux limits of 60-110 cm-2 s-1 (90% confidence level, CL) in the analysis range and present a model-independent flux. We also set limits on the annihilation rates for light dark matter pairs to neutrino pairs. These data improve on the upper probability limit of 8B solar neutrinos converting into , (90% CL) assuming an undistorted shape. This corresponds to a solar flux of 60 cm-2 s-1 (90% CL) in the analysis energy range.

AB - We report on a search for electron antineutrinos ( ) from astrophysical sources in the neutrino energy range 8.3-30.8 MeV with the KamLAND detector. In an exposure of 6.72 kton-year of the liquid scintillator, we observe 18 candidate events via the inverse beta decay reaction. Although there is a large background uncertainty from neutral current atmospheric neutrino interactions, we find no significant excess over background model predictions. Assuming several supernova relic neutrino spectra, we give upper flux limits of 60-110 cm-2 s-1 (90% confidence level, CL) in the analysis range and present a model-independent flux. We also set limits on the annihilation rates for light dark matter pairs to neutrino pairs. These data improve on the upper probability limit of 8B solar neutrinos converting into , (90% CL) assuming an undistorted shape. This corresponds to a solar flux of 60 cm-2 s-1 (90% CL) in the analysis energy range.

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UR - http://www.scopus.com/inward/citedby.url?scp=85124426293&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/ac32c1

DO - 10.3847/1538-4357/ac32c1

M3 - Article

AN - SCOPUS:85124426293

SN - 0004-637X

VL - 925

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 14

ER -

Limits on Astrophysical Antineutrinos with the KamLAND Experiment

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