arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1610.09508hep-exastro-ph.HEhep-phphysics.ins-det
收藏

用JUNO探测器研究太阳、超新星、大气和地球中微子

Solar, supernova, atmospheric and geo neutrino studies using JUNO detector

W. L. Guo, R. Han, Y. F. Li, G. Salamanna

摘要:

除了其主要目的是利用反应堆反中微子揭示质量等级(MH)外,中国江门的JUNO实验还将有助于研究来自非反应堆源的中微子。在这张海报中,我们回顾了JUNO在超新星、大气、太阳和地球中微子领域的目标;介绍了相关的实验问题,并提供了目前对其潜力的估计。对于一个距离为10 kpc的典型星系SN,JUNO将记录大约5000个逆β衰变事件,2000个中微子-质子弹性散射事件,300个中微子-电子散射事件,以及${^{12}}{\rm C}$核上的带电电流和中性电流相互作用。对于大气中微子,JUNO应该能够探测到$ν_e$和$ν_μ$带电电流事件。乐观地说,在10(20)年的数据采集后,可以在1.8 $σ$(2.6 $σ$)水平下测定MH。JUNO还将研究来自${^{7}}{\rm Be}$和${^{8}}{\rm B}$的太阳中微子,分别为低能量($\approx$ 1 MeV)和高能量,以提高我们对振荡机制和太阳金属丰度的物质效应的理解。挑战主要来自于放射性和宇宙成因背景:两个基准闪烁体放射性纯度的预期性能,显示。地球中微子的通量使我们对地球的组成和形成有了深入的了解。我们将展示JUNO的20 KTon液体闪烁体的大灵敏质量所提供的增加的样本大小将如何提供数据来回答几个地质问题,其中包括U/Th比和地幔测量。

英文摘要:

Aside from its primary purpose of shedding light on the mass hierarchy (MH) using reactor anti-neutrinos, the JUNO experiment in Jiangmen (China) will also contribute to study neutrinos from non-reactor sources. In this poster we review JUNO's goals in the realms of supernova, atmospheric, solar and geo-neutrinos; present the related experimental issues and provide the current estimates of its potential. For a typical galactic SN at a distance of 10 kpc, JUNO will record about 5000 events from inverse beta decay, 2000 events from elastic neutrino-proton scattering, 300 events from neutrino-electron scattering, and the charged current and neutral current interactions on the ${^{12}}{\rm C}$ nuclei. For atmospheric neutrinos, JUNO should be able to detect $ν_e$ and $ν_μ$ charged current events. Optimistically, a determination of the MH could be achieved at the 1.8$σ$ (2.6$σ$) level after 10 (20) years of data taking. JUNO will also study solar neutrinos from ${^{7}}{\rm Be}$ and ${^{8}}{\rm B}$, at low ($\approx$1 MeV) and higher energies respectively, to improve our understanding of the matter effects on the oscillation mechanism and of the solar metallicity. Challenges come primarily from the radioactive and cosmogenic backgrounds: the expected performance for two benchmark scintillator radio-purities, are shown. The flux of geo-neutrinos gives us an insight on the Earth composition and formation. We will show how the increased sample size given by JUNO's large sensitive mass of 20 KTon liquid scintillator will provide data to answer to several geological questions among which the U/Th ratio and mantle measurements.

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。

↑