时间：2018年12月24日上午9:30

地点：东区综合楼A1104

报告题目：和SuperCDMS实验一起探寻暗物质

Title: Detecting Dark Matter with SuperCDMS Experiment

摘要：暗物质是一种基于天文观测的假说理论。如果暗物质被证实存在，依据现有数据推测，它很可能占了宇宙能量组成的四分之一以上。尽管在天文观测中有种种证据支持其存在，至今还没有在地球上的探测器捕捉到暗物质信号。SuperCDMS实验用工作在超低温(50 mK)的硅和锗探测器试图捕捉暗物质信号。在这个报告里，我将讨论SuperCDMS探测器使用的技术，SuperCDMS实验的现状，以及下一阶段SuperCDMS实验的预期灵敏度。

Abstract: Dark matter is a hypothetical form of matter that, if it exists, may account for more than a quarter of the energy density of our universe. Despite the variety of astrophysical evidence pointing to its existence, the direct interaction of dark matter in a terrestrial detector is yet to be observed. The Super Cryogenic Dark Matter Search (SuperCDMS) experiment tries to observe a dark matter signal in silicon and germanium detectors operated around 50 miliKelvin. In this talk, I will discuss the technology, the current status, and the projected sensitivity of the next generation SuperCDMS experiment.

报告人简介：洪子卿，2010年本科毕业于中国科学技术大学近代物理系。2015年于Texas A&M University获得物理博士学位。2015年至今在Northwestern University以博士后职位从事研究。研究方向是基本粒子实验，主攻暗物质探测实验。

Honors and Awards

_ 2015 George Bush Presidential Library Foundation Graduate Student Travel Grant,

DPF, 2015

_ Travel Award, Top@20 workshop, 2015

_ Travel Award, XXXIV Physics in Collision, 2014

_ Young Scientist Forum Travel Award, 28th Les Rencontres de Physique de la Vall_ee

d'Aoste, 2014

Selected Publications

1. First Dark Matter Constraints from a SuperCDMS Single-Charge Sensitive Detector CDMS Collaboration (R. Agnese et al.), Phys. Rev. Lett 121, 051301 (2018)

2. Combined Forward-Backward Asymmetry Measurements in Top-Antitop Quark Production at the Tevatron CDF Collaboration (T. Aaltonen et al.), Phys. Rev. Lett 120, 042001 (2018)

3. Measurement of the forward-backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set CDF Collaboration (T. Aaltonen et al.), Phys. Rev. D 93, 112005 (2016)

4. Extrapolation Technique Pitfalls in Asymmetry Measurements at Colliders K. Colletti, Z. Hong, D. Toback, and J.S. Wilson, Nucl. Instrum. Meth. A830(2016) 176

5. Measurement of the inclusive leptonic asymmetry in top-quark pairs that decay to two charged leptons at CDFCDF Collaboration (T. Aaltonen et al.), Phys. Rev. Lett. 113, 042001 (2014)

6. On the Forward-Backward Asymmetry of Leptonic Decays of t_t at the Fermilab Tevatron

Ziqing Hong et al., Phys. Rev. D 90, 014040 (2014)

7. Prospects for measuring the mass of heavy, long-lived neutral particles that decay to photons Ziqing Hong and David Toback, J. of High Energy Phys. 09(2013)041

邀请人：陈刚 教授