For over 25 years, the DAMA/LIBRA experiment has claimed evidence of dark matter through an annual modulation signal, though no other experiments have confirmed this result. To address this, the COSINE-100 collaboration conducted a model-independent test using 106 kg of sodium iodide, the same target material as DAMA/LIBRA, over 6.4 years. With improved energy calibration and background modeling, our analysis found no evidence of an annual modulation, challenging DAMA/LIBRA’s claim at a confidence level greater than 3σ. Additionally, we explored new physics scenarios and set constraints on WIMP-nucleus interactions. The seminar will also cover the status of detector upgrade to COSINE-100U and plans for COSINE-200.
Bio:
SeungMok LEE (이승목, 李昇穆) is now a PhD candidate in Seoul National University in South Korea. He completed his Bachelor's degree at the same university and is planning to obtain the doctoral degree in February 2025 under the supervision of Professor Sun Kee Kim. He has participated in the COSINE-100 dark matter search experiment in the Yangyang underground laboratory in Korea. He recently performed the annual modulation signal search analysis to test the DAMA/LIBRA's long-standing claim.
请线下参加报告的外单位老师、同学注册时填写个人信息（中文姓名、身份证号码及手机号码），用于预约进入物理学院。
Prof. Jia Liu