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arXiv 1506.08309physics.ins-detastro-ph.CO
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多吨级液体氙探测器的暗物质灵敏度

Dark matter sensitivity of multi-ton liquid xenon detectors

Marc Schumann, Laura Baudis, Lukas Bütikofer, Alexander Kish, Marco Selvi

摘要:

我们研究了使用液体氙靶的多吨级时间投影室的灵敏度,例如,建议DARWIN仪器,自旋无关和自旋相关的WIMP-核子散射相互作用。考虑到现实的背景,从探测器本身以及从中微子,我们研究的曝光,能量阈值,背景抑制效率和能量分辨率的暗物质灵敏度的影响。随着曝光量为200 t x y,并假设探测器参数,这已经被实验证明,自旋无关的横截面低至$2.5 \times 10^{-49}$ cm $^2$可以探测到的WIMP质量约40 GeV/ $c^2$。在背景抑制和曝光方面的进一步改进将进一步提高灵敏度,而最终的WIMP科学范围将受到氙核相干散射中微子的限制。

英文摘要:

We study the sensitivity of multi ton-scale time projection chambers using a liquid xenon target, e.g., the proposed DARWIN instrument, to spin-independent and spin-dependent WIMP-nucleon scattering interactions. Taking into account realistic backgrounds from the detector itself as well as from neutrinos, we examine the impact of exposure, energy threshold, background rejection efficiency and energy resolution on the dark matter sensitivity. With an exposure of 200 t x y and assuming detector parameters which have been already demonstrated experimentally, spin-independent cross sections as low as $2.5 \times 10^{-49}$ cm$^2$ can be probed for WIMP masses around 40 GeV/$c^2$. Additional improvements in terms of background rejection and exposure will further increase the sensitivity, while the ultimate WIMP science reach will be limited by neutrinos scattering coherently off the xenon nuclei.

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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