PICO C$_3$F$_8$ 气泡室中电子反冲成核的数据驱动建模
仪器与探测器
2020-11-30 v4 宇宙学与河外天体物理
高能物理 - 实验
高能物理 - 唯象学
摘要
中等过热气泡室探测器的主要优势在于其同时对来自 WIMP 暗物质的核反冲敏感，而对电子反冲本底不敏感。对 PICO 伽马标定数据的全面分析首次表明，CF 中的电子反冲按照一种新的成核机制缩放，而非先前认为的热尖峰驱动机制。利用该半经验模型，可调节气泡室成核阈值以对更低能量的核反冲敏感，同时保持优异的电子反冲抑制能力。PICO-40L 探测器将利用该模型实现低至 2.8 keV 的热力学阈值，同时以太阳中微子的相干弹性中微子-核散射的单散射事件为主。在一年运行中，对于质量大于 3 GeV c 的 WIMP，PICO-40L 可将 PICO 现有的自旋相关 WIMP-质子耦合领先限制提高近一个数量级，并将能够超越所有现有的非氙约束，在 WIMP 质量为 3 至 40 GeV c 范围内对自旋无关 WIMP-核子耦合给出限制。
引用
@article{arxiv.1905.12522,
title = {Data-Driven Modeling of Electron Recoil Nucleation in PICO C$_3$F$_8$ Bubble Chambers},
author = {C. Amole and M. Ardid and I. J. Arnquist and D. M. Asner and D. Baxter and E. Behnke and M. Bressler and B. Broerman and G. Cao and C. J. Chen and S. Chen and U. Chowdhury and K. Clark and J. I. Collar and P. S. Cooper and C. B. Coutu and C. Cowles and M. Crisler and G. Crowder and N. A. Cruz-Venegas and C. E. Dahl and M. Das and S. Fallows and J. Farine and R. Filgas and J. Fuentes and F. Girard and G. Giroux and B. Hackett and A. Hagen and J. Hall and C. Hardy and O. Harris and T. Hillier and E. W. Hoppe and C. M. Jackson and M. Jin and L. Klopfenstein and T. Kozynets and C. B. Krauss and M. Laurin and I. Lawson and A. Leblanc and I. Levine and C. Licciardi and W. H. Lippincott and B. Loer and F. Mamedov and P. Mitra and C. Moore and T. Nania and R. Neilson and A. J. Noble and P. Oedekerk and A. Ortega and S. Pal and M. -C. Piro and A. Plante and S. Priya and A. E. Robinson and S. Sahoo and O. Scallon and S. Seth and A. Sonnenschein and N. Starinski and I. Štekl and T. Sullivan and F. Tardif and D. Tiwari and E. Vázquez-Jáuregui and J. M. Wagner and N. Walkowski and E. Weima and U. Wichoski and K. Wierman and W. Woodley and Y. Yan and V. Zacek and J. Zhang},
journal= {arXiv preprint arXiv:1905.12522},
year = {2020}
}
备注
18 pages, 12 figures