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arXiv 1602.01738astro-ph.IMphysics.ins-det
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用快中子测量的MIMAC低能电子反冲分辨

MIMAC low energy electron-recoil discrimination measured with fast neutrons

Q. Riffard, D. Santos, O. Guillaudin, G. Bosson, O. Bourrion, J. Bouvier, T. Descombes, J. -F. Muraz, L. Lebreton, D. Maire, P. Colas, I. Giomataris, J. Busto, … 展开作者

Q. Riffard, D. Santos, O. Guillaudin, G. Bosson, O. Bourrion, J. Bouvier, T. Descombes, J. -F. Muraz, L. Lebreton, D. Maire, P. Colas, I. Giomataris, J. Busto, D. Fouchez, J. Brunner, C. Tao

摘要:

MIMAC(MIcro-TPC MATERIAL of Chambers)是一个定向WIMP暗物质探测器项目。直接的暗物质实验需要高水平的电子/反冲鉴别来寻找由WIMP-核弹性散射产生的核反冲。在本文中,我们提出了一个原始的方法,电子事件拒绝的基础上,应用于实验数据采集单色中子场的多元分析。该分析表明,$10^5$抑制功率对于电子/反冲辨别是可达到的。此外,通过蒙特卡罗模拟估计效率,表明在考虑全能量范围的情况下,利用$86.49\pm 0.17$ \%的核反冲效率达到105电子排斥功率,并且在考虑5 keV的低阈值的情况下,利用$94.67\pm0.19$ \%的核反冲效率达到105电子排斥功率。

英文摘要:

MIMAC (MIcro-TPC MAtrix of Chambers) is a directional WIMP Dark Matter detector project. Direct dark matter experiments need a high level of electron/recoil discrimination to search for nuclear recoils produced by WIMP-nucleus elastic scattering. In this paper, we proposed an original method for electron event rejection based on a multivariate analysis applied to experimental data acquired using monochromatic neutron fields. This analysis shows that a $10^5$ rejection power is reachable for electron/recoil discrimination. Moreover, the efficiency was estimated by a Monte-Carlo simulation showing that a 105 electron rejection power is reached with a $86.49\pm 0.17$\% nuclear recoil efficiency considering the full energy range and $94.67\pm0.19$\% considering a 5~keV lower threshold.

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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