利用液氦氩中的散射时间判别进行直接WIMP探测
天体物理学
2009-11-10 v1
摘要
通过利用电子与核冲击事件在液氦氩散射探测器中之间在散射光子时分布差异，已在仿真中演示了对电子与核冲击事件的判别。对于阈值为10 keV的液氦氩实验，预测的判别功率可达10^{8}，这将缓解包括大气氩中39-Ar和42-Ar β衰变在内的电子和伽马射线背景。使用约2 kg的氩目标通过浸没式光子倍增管观测的暗物质搜索，将允许对100 GeV WIMP的自旋无关WIMP-核子十字截面积达到约10^{-43} cm^{2}的灵敏度，假设为一年曝露。该技术可用于将目标质量扩展至吨级，从而实现约10^{-46} cm^{2}的灵敏度。
引用
@article{arxiv.astro-ph/0411357,
title = {Spectroscopy of High-Redshift Supernovae from the ESSENCE Project: The First Two Years},
author = {T. Matheson and S. Blondin and R. J. Foley and R. Chornock and A. V. Filippenko and B. Leibundgut and R. C. Smith and J. Sollerman and J. Spyromilio and R. P. Kirshner and A. Clocchiatti and C. Aguilera and B. Barris and A. C. Becker and P. Challis and R. Covarrubias and P. Garnavich and M. Hicken and S. Jha and K. Krisciunas and W. Li and A. Miceli and G. Miknaitis and J. L. Prieto and A. Rest and A. G. Riess and M. E. Salvo and B. P. Schmidt and C. W. Stubbs and N. B. Suntzeff and J. L. Tonry},
journal= {arXiv preprint arXiv:astro-ph/0411357},
year = {2009}
}
备注
38 pages, 9 figures (many with multiple parts), submitted to AJ