Measurement of the 8B solar neutrino flux with the KamLAND liquid scintillator detector

Measurement of the 8B solar neutrino flux with the KamLAND liquid scintillator detector
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DOI：
10.1103/physrevc.84.035804
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发表时间：
2011-06
期刊：
Physical Review C
影响因子：
3.1
通讯作者：
K. Abe;K. Furuno;A. Gando;Y. Gando;K. Ichimura;H. Ikeda;K. Inoue;Y. Kibe;W. Kimura;Y. Kishimoto;M. Koga;Y. Minekawa;T. Mitsui;T. Morikawa;N. Nagai;K. Nakajima;K. Nakamura;M. Nakamura;K. Narita;I. Shimizu;Y. Shimizu;J. Shirai;F. Suekane;A. Suzuki;H. Takahashi;N. Takahashi;Y. Takemoto;K. Tamae;H. Watanabe;B. D. Xu;H. Yabumoto;E. Yonezawa;H. Yoshida;S. Yoshida;S. Enomoto;A. Kozlov;H. Murayama;C. Grant;G. Keefer;D. Mckee;A. Piepke;T. Banks;T. Bloxham;J. Detwiler;S. Freedman;B. Fujikawa;K. Han;R. Kadel;Thomas O'Donnell;H. Steiner;L. Winslow;D. Dwyer;C. Mauger;R. Mckeown;C. Zhang;B. Berger;C. Lane;J. Maricic;T. Miletić;M. Batygov;J. Learned;S. Matsuno;S. Pakvasa;M. Sakai;G. Horton-Smith;A. Tang;K. Downum;G. Gratta;K. Tolich;Y. Efremenko;Y. Kamyshkov;O. Perevozchikov;H. Karwowski;D. Markoff;W. Tornow;K. Heeger;F. Piquemal;J. Ricol;M. Decowski
K. Abe;K. Furuno;A. Gando;Y. Gando;K. Ichimura;H. Ikeda;K. Inoue;Y. Kibe;W. Kimura;Y. Kishimoto;M. Koga;Y. Minekawa;T. Mitsui;T. Morikawa;N. Nagai;K. Nakajima;K. Nakamura;M. Nakamura;K. Narita;I. Shimizu;Y. Shimizu;J. Shirai;F. Suekane;A. Suzuki;H. Takahashi;N. Takahashi;Y. Takemoto;K. Tamae;H. Watanabe;B. D. Xu;H. Yabumoto;E. Yonezawa;H. Yoshida;S. Yoshida;S. Enomoto;A. Kozlov;H. Murayama;C. Grant;G. Keefer;D. Mckee;A. Piepke;T. Banks;T. Bloxham;J. Detwiler;S. Freedman;B. Fujikawa;K. Han;R. Kadel;Thomas O'Donnell;H. Steiner;L. Winslow;D. Dwyer;C. Mauger;R. Mckeown;C. Zhang;B. Berger;C. Lane;J. Maricic;T. Miletić;M. Batygov;J. Learned;S. Matsuno;S. Pakvasa;M. Sakai;G. Horton-Smith;A. Tang;K. Downum;G. Gratta;K. Tolich;Y. Efremenko;Y. Kamyshkov;O. Perevozchikov;H. Karwowski;D. Markoff;W. Tornow;K. Heeger;F. Piquemal;J. Ricol;M. Decowski
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
K. Abe;K. Furuno;A. Gando;Y. Gando;K. Ichimura;H. Ikeda;K. Inoue;Y. Kibe;W. Kimura;Y. Kishimoto;M. Koga;Y. Minekawa;T. Mitsui;T. Morikawa;N. Nagai;K. Nakajima;K. Nakamura;M. Nakamura;K. Narita;I. Shimizu;Y. Shimizu;J. Shirai;F. Suekane;A. Suzuki;H. Takahashi;N. Takahashi;Y. Takemoto;K. Tamae;H. Watanabe;B. D. Xu;H. Yabumoto;E. Yonezawa;H. Yoshida;S. Yoshida;S. Enomoto;A. Kozlov;H. Murayama;C. Grant;G. Keefer;D. Mckee;A. Piepke;T. Banks;T. Bloxham;J. Detwiler;S. Freedman;B. Fujikawa;K. Han;R. Kadel;Thomas O'Donnell;H. Steiner;L. Winslow;D. Dwyer;C. Mauger;R. Mckeown;C. Zhang;B. Berger;C. Lane;J. Maricic;T. Miletić;M. Batygov;J. Learned;S. Matsuno;S. Pakvasa;M. Sakai;G. Horton-Smith;A. Tang;K. Downum;G. Gratta;K. Tolich;Y. Efremenko;Y. Kamyshkov;O. Perevozchikov;H. Karwowski;D. Markoff;W. Tornow;K. Heeger;F. Piquemal;J. Ricol;M. Decowski

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我们报告了基于KamLAND的123千吨日暴露的^8B太阳中微子的中微子-电子弹性散射率的测量。背景减去电子反冲率，高于5.5 mev的分析阈值为1.49±0.14（stat）±0.17（syst）事件/千吨天。由于具有^8B中微子谱的纯电子风味通量，这对应于谱积分通量为2.77±0.26（stat）±0.32（syst） ×10^6 cm^(−2_s^（−1）。分析阈值由液体闪烁体中存在的^(208)Tl驱动，系统不确定性的主要来源是宇宙起源的^(11)Be背景。测量到的速率与现有的测量和标准太阳模型预测一致，其中包括物质增强的中微子振荡。
We report a measurement of the neutrino-electron elastic scattering rate from ^8B solar neutrinos based on a 123 kton-day exposure of KamLAND. The background-subtracted electron recoil rate, above a 5.5-MeV analysis threshold is 1.49 ± 0.14(stat) ± 0.17(syst) events per kton-day. Interpreted as due to a pure electron flavor flux with a ^8B neutrino spectrum, this corresponds to a spectrum integrated flux of 2.77 ± 0.26(stat) ± 0.32(syst) ×10^6 cm^(−2_s^(−1). The analysis threshold is driven by ^(208)Tl present in the liquid scintillator, and the main source of systematic uncertainty is due to background from cosmogenic ^(11)Be. The measured rate is consistent with existing measurements and with standard solar model predictions which include matter-enhanced neutrino oscillation.