SuperCDMS Collaboration, R. Agnese, A. J. Anderson, T. Aralis, T. Aramaki, I. J. Arnquist, W. Baker, D. Balakishiyeva, D. Barker, R. Basu Thakur, D. A. Bauer, T… 展开作者
SuperCDMS Collaboration, R. Agnese, A. J. Anderson, T. Aralis, T. Aramaki, I. J. Arnquist, W. Baker, D. Balakishiyeva, D. Barker, R. Basu Thakur, D. A. Bauer, T. Binder, M. A. Bowles, P. L. Brink, R. Bunker, B. Cabrera, D. O. Caldwell, R. Calkins, C. Cartaro, D. G. Cerdeno, Y. Chang, H. Chagani, Y. Chen, J. Cooley, B. Cornell, P. Cushman, M. Daal, P. C. F. Di Stefano, T. Doughty, L. Esteban, E. Fascione, E. Figueroa-Feliciano, M. Fritts, G. Gerbier, M. Ghaith, G. L. Godfrey, S. R. Golwala, J. Hall, H. R. Harris, Z. Hong, E. W. Hoppe, L. Hsu, M. E. Huber, V. Iyer, D. Jardin, A. Jastram, C. Jena, M. H. Kelsey, A. Kennedy, A. Kubik, N. A. Kurinsky, A. Leder, B. Loer, E. Lopez Asamar, P. Lukens, D. MacDonell, R. Mahapatra, V. Mandic, N. Mast, E. H. Miller, N. Mirabolfathi, R. A. Moffatt, B. Mohanty, J. D. Morales Mendoza, J. Nelson, J. L. Orrell, S. M. Oser, K. Page, W. A. Page, R. Partridge, M. Pepin, M. Penalver Martinez, A. Phipps, S. Poudel, M. Pyle, H. Qiu, W. Rau, P. Redl, A. Reisetter, T. Reynolds, A. Roberts, A. E. Robinson, H. E. Rogers, T. Saab, B. Sadoulet, J. Sander, K. Schneck, R. W. Schnee, S. Scorza, K. Senapati, B. Serfass, D. Speller, M. Stein, J. Street, H. A. Tanaka, D. Toback, R. Underwood, A. N. Villano, B. von Krosigk, B. Welliver, J. S. Wilson, M. J Wilson, D. H. Wright, S. Yellin, J. J. Yen, B. A. Young, X. Zhang, X. Zhao
备注：
30 Pages, 33 Figures v3 to match published version in PRD. v2 contains public release (and documentation) of the CDMSlite Run 2 data as ancillary files
SuperCDMS实验旨在直接探测可能构成银河系暗物质的弱相互作用大质量粒子（WIMP）。在苏丹地下实验室运行期间，锗探测器以CDMSlite模式运行，以收集专门针对质量为${<}$ 10 GeV/ $c^2$的WIMP的灵敏度数据集。在这种模式下，施加更高的检测器偏置电压以放大由漂移电荷产生的声子信号。本文介绍了实验噪声及其对可实现的能量阈值的影响，这被证明是低至56 eV的$_{\text{ee}}$（电子等效能量）的研究。详细描述了检测器偏置配置，并对电压变化进行了分析校正，校正幅度为百分之几。对电场几何形状的详细研究以及由此产生的基准参数的成功开发，消除了测量不佳的事件，产生的能量分辨率范围从0 keV时的${\sim}$ 9 eV $_{\text{ee}}$到${\sim}$ 10 eV $_{\text{ee}}$时的101 eV $_{\text{ee}}$。新的结果来自天体物理学的不确定性相关的WIMP搜索限制，特别是检查它们是如何受到影响的变化，最可能的WIMP速度和银河系逃逸速度。这些变化变得更加重要的弱相互作用质量低于10 GeV/ $c^2$。最后，在排除WIMP质量为$\lesssim$ 3 GeV/ $c^2$的新参数空间后，导出了自旋相关的低质量WIMP-核子相互作用的新极限
英文摘要：
The SuperCDMS experiment is designed to directly detect weakly interacting massive particles (WIMPs) that may constitute the dark matter in our Galaxy. During its operation at the Soudan Underground Laboratory, germanium detectors were run in the CDMSlite mode to gather data sets with sensitivity specifically for WIMPs with masses ${<}$10 GeV/$c^2$. In this mode, a higher detector-bias voltage is applied to amplify the phonon signals produced by drifting charges. This paper presents studies of the experimental noise and its effect on the achievable energy threshold, which is demonstrated to be as low as 56 eV$_{\text{ee}}$ (electron equivalent energy). The detector-biasing configuration is described in detail, with analysis corrections for voltage variations to the level of a few percent. Detailed studies of the electric-field geometry, and the resulting successful development of a fiducial parameter, eliminate poorly measured events, yielding an energy resolution ranging from ${\sim}$9 eV$_{\text{ee}}$ at 0 keV to 101 eV$_{\text{ee}}$ at ${\sim}$10 eV$_{\text{ee}}$. New results are derived for astrophysical uncertainties relevant to the WIMP-search limits, specifically examining how they are affected by variations in the most probable WIMP velocity and the Galactic escape velocity. These variations become more important for WIMP masses below 10 GeV/$c^2$. Finally, new limits on spin-dependent low-mass WIMP-nucleon interactions are derived, with new parameter space excluded for WIMP masses $\lesssim$3 GeV/$c^2$
