SuperCDMS Collaboration, R. Agnese, A. J. Anderson, T. Aramaki, M. Asai, W. Baker, D. Balakishiyeva, D. Barker, R. Basu Thakur, D. A. Bauer, J. Billard, A. Borg… 展开作者
SuperCDMS Collaboration, R. Agnese, A. J. Anderson, T. Aramaki, M. Asai, W. Baker, D. Balakishiyeva, D. Barker, R. Basu Thakur, D. A. Bauer, J. Billard, A. Borgland, M. A. Bowles, P. L. Brink, R. Bunker, B. Cabrera, D. O. Caldwell, R. Calkins, D. G. Cerdeno, H. Chagani, Y. Chen, J. Cooley, B. Cornell, P. Cushman, M. Daal, P. C. F. Di Stefano, T. Doughty, L. Esteban, S. Fallows, E. Figueroa-Feliciano, M. Ghaith, G. L. Godfrey, S. R. Golwala, J. Hall, H. R. Harris, T. Hofer, D. Holmgren, L. Hsu, M. E. Huber, D. Jardin, A. Jastram, O. Kamaev, B. Kara, M. H. Kelsey, A. Kennedy, A. Leder, B. Loer, E. Lopez Asamar, P. Lukens, R. Mahapatra, V. Mandic, N. Mast, N. Mirabolfathi, R. A. Moffatt, J. D. Morales Mendoza, S. M. Oser, K. Page, W. A. Page, R. Partridge, M. Pepin, A. Phipps, K. Prasad, M. Pyle, H. Qiu, W. Rau, P. Redl, A. Reisetter, Y. Ricci, A. Roberts, H. E. Rogers, T. Saab, B. Sadoulet, J. Sander, K. Schneck, R. W. Schnee, S. Scorza, B. Serfass, B. Shank, D. Speller, D. Toback, R. Underwood, S. Upadhyayula, A. N. Villano, B. Welliver, J. S. Wilson, D. H. Wright, S. Yellin, J. J. Yen, B. A. Young, J. Zhang
备注：
6 pages, 4 figures. v2 Matches the accepted version in PRL
The CDMS low ionization threshold experiment (CDMSlite) uses cryogenic germanium detectors operated at a relatively high bias voltage to amplify the phonon signal in the search for weakly interacting massive particles (WIMPs). Results are presented from the second CDMSlite run with an exposure of 70 kg days, which reached an energy threshold for electron recoils as low as 56 eV. A fiducialization cut reduces backgrounds below those previously reported by CDMSlite. New parameter space for the WIMP-nucleon spin-independent cross section is excluded for WIMP masses between 1.6 and 5.5 GeV/$c^2$.
Improved dark matter search results from PICO-2L Run 2
报告了2升PICO-2 L C $_3$ F $_8$泡室第二次运行的新数据，总暴露量为129 $\,$ kg-天，热力学阈值能量为3.3 $\,$ keV。这些数据表明，为控制过热流体中的颗粒污染而采取的措施导致在该泡室的第一次运行中观察到的异常背景事件的缺失。在数据中观察到一个单一的核反冲事件，与预测的中子背景速率和观察到的明确的多气泡中子散射事件的速率一致。该室表现出同样出色的电子反冲和α衰变抑制，如以前报道的。这些数据提供了最严格的直接检测限制弱相互作用大质量粒子（WIMP）质子自旋相关散射迄今为止的WIMP质量$<$ 50 $\,$ GeV/c $^2$。
