First Dark Matter Constraints from a SuperCDMS Single-Charge Sensitive Detector
SuperCDMS Collaboration, R. Agnese, T. Aralis, T. Aramaki, I. J. Arnquist, E. Azadbakht, W. Baker, S. Banik, D. Barker, D. A. Bauer, T. Binder, M. A. Bowles, P.… 展开作者
SuperCDMS Collaboration, R. Agnese, T. Aralis, T. Aramaki, I. J. Arnquist, E. Azadbakht, W. Baker, S. Banik, D. Barker, D. A. Bauer, T. Binder, M. A. Bowles, P. L. Brink, R. Bunker, B. Cabrera, R. Calkins, C. Cartaro, D. G. Cerdeno, Y. -Y. Chang, J. Cooley, B. Cornell, P. Cushman, P. C. F. Di Stefano, T. Doughty, E. Fascione, E. Figueroa-Feliciano, C. Fink, M. Fritts, G. Gerbier, R. Germond, M. Ghaith, S. R. Golwala, H. R. Harris, Z. Hong, E. W. Hoppe, L. Hsu, M. E. Huber, V. Iyer, D. Jardin, C. Jena, M. H. Kelsey, A. Kennedy, A. Kubik, N. A. Kurinsky, R. E. Lawrence, J. V. Leyva, B. Loer, E. Lopez Asamar, P. Lukens, D. MacDonell, R. Mahapatra, V. Mandic, N. Mast, E. H. Miller, N. Mirabolfathi, B. Mohanty, J. D. Morales Mendoza, J. Nelson, J. L. Orrell, S. M. Oser, W. A. Page, R. Partridge, M. Pepin, A. Phipps, F. Ponce, S. Poudel, M. Pyle, H. Qiu, W. Rau, A. Reisetter, T. Reynolds, A. Roberts, A. E. Robinson, H. E. Rogers, R. K. Romani, T. Saab, B. Sadoulet, J. Sander, A. Scarff, R. W. Schnee, S. Scorza, K. Senapati, B. Serfass, J. So, D. Speller, C. Stanford, M. Stein, J. Street, H. A. Tanaka, D. Toback, R. Underwood, A. N. Villano, B. von Krosigk, S. L. Watkins, J. S. Wilson, M. J. Wilson, J. Winchell, D. H. Wright, S. Yellin, B. A. Young, X. Zhang, X. Zhao
备注:
6 pages + title and references, 6 figures, includes erratum submitted to PRL and data release
We present the first limits on inelastic electron-scattering dark matter and dark photon absorption using a prototype SuperCDMS detector having a charge resolution of 0.1 electron-hole pairs (CDMS HVeV, a 0.93 gram CDMS HV device). These electron-recoil limits significantly improve experimental constraints on dark matter particles with masses as low as 1 MeV/$\mathrm{c^2}$. We demonstrate a sensitivity to dark photons competitive with other leading approaches but using substantially less exposure (0.49 gram days). These results demonstrate the scientific potential of phonon-mediated semiconductor detectors that are sensitive to single electronic excitations.
低温暗物质搜索实验(CDMS)采用低温Ge和Si探测器通过目标核的弹性散射来探测WIMP。最后一次分析中,锗暴露量为397.8千克-天,没有观测到任何候选事件,因此,当WIMP质量为60 GeV时,与自旋无关的WIMP-核子截面的上限为6.6 x 10 ^{-44} cm ^2(如果包括之前的CDMS Soudan数据,则为4.6 x 10^{-44} cm ^2)。将讨论当前分析的表面事件抑制能力的改进,其中锗暴露比上次分析中使用的暴露大2.5倍。为了将灵敏度提高到超过1 x 10^{-44} cm ^2的基准,研制了新的1英寸厚的探测器。由六个这种探测器组成的第一个塔已成功地安装在苏丹场址。这些探测器将用于15 kg的SuperCDMS级,预期对自旋无关的WIMP-核子弹性散射截面的灵敏度为5 x 10^{-45} cm ^2。此外,CDMS协作组已经开始寻找非WIMP暗物质粒子的特征,这可能解释DAMA观测到的年度调制特征。
Performance of a SuperCDMS HVeV Detector with Sub-eV Energy Resolution and Single Charge-sensitivity
Northwestern University(西北大学);SLAC National Laboratory(斯坦福直线加速器中心);University of Toronto(多伦多大学);Karlsruhe Institute of Technology (KIT)(卡尔斯鲁厄理工学院);University of Minnesota(明尼苏达大学)
Search for low-mass electron-recoil dark matter using a single-charge sensitive SuperCDMS-HVeV Detector
University of British Columbia(不列颠哥伦比亚大学);TRIUMF(特里姆夫实验室);University of Toronto(多伦多大学);Universidad Autónoma de Madrid(马德里自治大学);Instituto de Física Teórica UAM-CSIC(UAM-CSIC理论物理研究所);SLAC National Accelerator Laboratory(斯坦福直线加速器中心);Kavli Institute for Particle Astrophysics and Cosmology(卡弗里粒子天体物理与宇宙学研究所);Northeastern University(东北大学);Texas A&M University(德克萨斯农工大学);University of Florida(佛罗里达大学)
Low-Energy Calibration of SuperCDMS HVeV Cryogenic Silicon Calorimeters Using Compton Steps
University of British Columbia(不列颠哥伦比亚大学);University of Toronto(多伦多大学);Durham University(杜伦大学);SLAC National Accelerator Laboratory(斯坦福直线加速器中心);Kavli Institute for Particle Astrophysics and Cosmology(卡弗里粒子天体物理与宇宙学研究所);Northeastern University(东北大学);Mitchell Institute for Fundamental Physics and Astronomy(米歇尔基础物理与天文学研究所);University of Florida(佛罗里达大学);Pacific Northwest National Laboratory(太平洋西北国家实验室);Stanford University(斯坦福大学);Southern Methodist University(南方卫理公会大学);University of California, Berkeley(加州大学伯克利分校);National Institute of Science Education and Research(国家科学教育与研究学院);Homi Bhabha National Institute(霍米·巴巴国家研究所);Northwestern University(西北大学);South Dakota School of Mines and Technology(南达科他矿业理工学院);SNOLAB(萨诺实验室);University of Minnesota(明尼苏达大学);Queen's University(女王大学);University of South Dakota(南达科他大学);University of Colorado Denver(科罗拉多大学丹佛分校);Zayed University(扎耶德大学);California Institute of Technology(加州理工学院);Laurentian University(劳伦森大学);Fermi National Accelerator Laboratory(费米国家加速器实验室);Karlsruhe Institute of Technology(卡尔斯鲁厄理工学院);Institute for Astroparticle Physics(天体粒子物理研究所);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室)
Developments of a 2D Position Sensitive Neutron Detector
中国空间中子源是国家“十二五”规划项目之一,目前正在广东省建设。在项目的第一阶段将安装三台中子谱仪,其中需要二维位置敏感热中子探测器。在中子探测器建造之前,2009年已经建造了一个二维200 mm × 200 mm的多丝正比室(MWPC)的原型,流动气体为Ar/CO2(90/10),并使用部分电子器件进行了55 Fe X射线测试,表现出良好的性能。在2009年的测试之后,中子探测器已经被构造成具有完整的电子设备,并在2010年填充了6atm.3He + 2.5atm.C3H8气体混合物。中子探测器已初步测试与Am/Be源。本文介绍了中子探测器的一些新进展,包括高压室的设计、气体净化系统的优化和充气工艺。本文还介绍了结果和讨论。
Projected Sensitivity of Paleo-Detectors to Dark Matter Effective Interactions with Nuclei
The University of Texas at Austin(德克萨斯大学奥斯汀分校);Stockholm University(斯德哥尔摩大学);KTH Royal Institute of Technology(皇家理工学院);University of North Florida(北佛罗里达大学);Jožef Stefan Institute(约瑟夫·斯蒂芬研究所)
Detection capability of Migdal effect for argon and xenon nuclei with position sensitive gaseous detectors
由于迁移效应可以提高直接探测低质量区域暗物质的灵敏度,因此引起了人们的兴趣。尽管米格达尔效应非常重要,但尚未在实验上观察到。用蒙特卡罗模拟研究了中子散射中Migdal效应首次观测的一种现实的实验方法。在这项研究中,潜在的背景率一起研究的事件率的米格达尔效应的中子源。发现填充有氩或氙目标气体的桌面大小的$\sim (30\rm cm )^3$位置敏感气体检测器可以以足够的速率(O($10^2\sim10^3$)事件/天)检测Migdal效应的特征签名。一个简单的实验装置的模拟结果表明,两个显着的背景源,即本征中子和中子感生γ射线。这些背景率被发现是远远高于中子散射中的Migdal效应。作为这项研究的结果,它的结论是,在中子散射中的Migdal效应的实验观察可以实现一个很好的理解和减少的背景。
Measurement of detector-corrected observables sensitive to the anomalous production of events with jets and large missing transverse momentum in $pp$ collisions at $\sqrt{s} = 13$ TeV using the ATLAS detector
Measurement of distributions sensitive to the underlying event in inclusive $Z$-boson production in pp collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
Measurement of distributions sensitive to the underlying event in inclusive Z-boson production in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
Development of a one-dimensional position sensitive detector for Compton X-ray polarimeters
Physical Research Laboratory(物理研究实验室);INAF − - Istituto di Astrofisica e Planetologia Spaziali di Roma(罗马天体物理学和行星学研究所);Kavli Institute of Particle Astrophysics and Cosmology, Stanford University(斯坦福大学卡弗里粒子天体物理学与宇宙学研究所)
Measurement of charged-particle distributions sensitive to the underlying event in $\sqrt{s} = 13$ TeV proton-proton collisions with the ATLAS detector at the LHC
我们提出的带电粒子分布敏感的底层事件,测量的ATLAS探测器在质子-质子碰撞的质量中心能量为13 TeV,在低光度大型强子对撞机填充对应于1.6 nb $^{-1}$的积分亮度。的分布构造使用带电粒子的绝对赝快度小于2.5和横向动量大于500兆电子伏,在事件中至少有一个这样的带电粒子的横向动量超过1 GeV。这些分布描述了相对于具有最高横向动量的带电粒子的能量和粒子流的角分布,作为动量和带电粒子多重性的函数。结果已被校正的探测器的影响,并进行比较,各种蒙特卡罗事件发生器的预测,实验建立在LHC运行2能量的基础事件活动的水平,并提供输入事件发生器建模的发展。目前用于UE建模的模型通常将该数据描述为5%的准确度,而数据的不确定性小于1%。
Combined effective field theory interpretation of measurements sensitive to quartic gauge boson couplings in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
EUROPEAN ORGANISATION FOR NUCLEAR RESEARCH (CERN)(欧洲核子研究组织(CERN))
本文结合ATLAS探测器在13 TeV pp碰撞中对四阶规范玻色子耦合敏感的测量,利用有效场论约束Éboli模型中由维度8算符引起的电弱玻色子四阶自耦合。