用KamLAND实验限制天体物理反中微子
高能天体物理现象
2022-02-02 v3 高能物理 - 实验
摘要
我们报告在8.3至30.8 MeV中微子能量范围内利用KamLAND探测器对来自天体物理源的电子反中微子()的搜寻。在6.72 kton-year液体闪烁体的曝光量中，我们通过逆β衰变反应观测到18个候选事件。尽管来自中性流大气中微子相互作用的本底不确定性很大，我们发现相对于本底模型预测无显著超出。假设若干超新星遗迹中微子谱，我们在分析范围内给出60--110 cm s(90% CL)的上限通量，并给出一个与模型无关的通量。我们还设定了轻暗物质对湮灭为中子微子对的速率限制。这些数据改进了B太阳中微子转化为的上限概率限制，(90% CL)(假设未畸变的形状)。这对应于分析能量范围内60 cm s(90% CL)的太阳通量。
引用
@article{arxiv.2108.08527,
title = {Limits on astrophysical antineutrinos with the KamLAND experiment},
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 T. Kinoshita and Y. Kishimoto and M. Koga and N. Maemura and T. Mitsui and H. Miyake and K. Nakamura and K. Nakamura and R. Nakamura and H. Ozaki and T. Sakai and H. Sambonsugi and I. Shimizu 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 A. K. Ichikawa and A. Kozlov and D. Chernyak and Y. Takemoto and S. Yoshida and S. Umehara and K. Fushimi and S. Hirata and K. Z. Nakamura and M. Yoshida and B. E. Berger and B. L. Fujikawa and J. G. Learned and J. Maricic and S. N. Axani and Z. Fu and J. Ouellet and L. A. Winslow and Y. Efremenko and H. J. Karwowski and D. M. Markoff and W. Tornow and A. Li and J. A. Detwiler and S. Enomoto and M. P. Decowski and C. Grant and S. Dell'Oro and T. O'donnell},
journal= {arXiv preprint arXiv:2108.08527},
year = {2022}
}
备注
21 pages, 9 figures, 4 tables, accepted for publication in Astrophysical Journal