arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.04633hep-phastro-ph.HEhep-exnucl-th
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大气中微子在大型液体闪烁体探测器上引起的中性电流本底:I。模型预测

Neutral-current background induced by atmospheric neutrinos at large liquid-scintillator detectors: I. model predictions

Jie Cheng, Yu-Feng Li, Liang-Jian Wen, Shun Zhou

摘要:

在下一代大型液体闪烁体(LS)探测器中对扩散超新星中微子背景和质子衰变的实验研究与水切伦科夫探测器中的研究是竞争和互补的。本文系统地研究了大气中微子通过与$^{12}{\rm C}$核的中性流相互作用在LS探测器中产生的主导背景。使用了江门地下中微子天文台(JUNO)所在地的大气中微子通量,因为JUNO探测器显然是未来LS探测器的合适代表。然后,我们实现了复杂的生成器\texttt{GENIE}和\texttt{NuWro}来模拟中微子与碳核的相互作用,并实现了处理末态核去激发的程序包\texttt{TALYS}。最后,得到了产生额外核子、$γ$'s、$α$'s、π介子和K介子的事件率,并对它们进行了分类,估算了由各种数据驱动的核模型所代表的NC背景的系统不确定性。本文还讨论了大气中微子的NC本底对探测扩散超新星中微子本底和质子衰变的意义。

英文摘要:

The experimental searches for diffuse supernova neutrino background and proton decay in next-generation large liquid-scintillator (LS) detectors are competitive with and complementary to those in the water-Cherenkov detectors. In this paper, we carry out a systematic study of the dominant background induced by atmospheric neutrinos via their neutral-current (NC) interactions with the $^{12}{\rm C}$ nuclei in the LS detectors. The atmospheric neutrino fluxes at the location of Jiangmen Underground Neutrino Observatory (JUNO) are used, as the JUNO detector is obviously a suitable representative for future LS detectors. Then, we implement the sophisticated generators \texttt{GENIE} and \texttt{NuWro} to simulate the neutrino interactions with the carbon nuclei, and the package \texttt{TALYS} to deal with the deexcitations of final-state nuclei. Finally, the event rates for the production of additional nucleons, $γ$'s, $α$'s, pions and kaons are obtained and categorized, and the systematic uncertainty of the NC background represented by a variety of data-driven nuclear models is estimated. The implications of the NC background from atmospheric neutrinos for the detection of diffuse supernova neutrino background and proton decay are also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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