通知公告

报告题目：How theorists contribute to discover toponium at the LHC?

报告摘要： In 2019, experimentalists studying top quark pair production at the LHC reported an anomaly in the di-leptonic decay channels. They observed excess of events when di-leptons have small relative angles or small invariant mass. In 2021, we showed that the anomaly can be a signal of toponium formation, with the cross section of about 6.4pb. In 2025, both ATLAS and CMS experiments reported observation of toponium like events with expected cross section. Toponium physics is governed by QCD, and hence each state has definite spin, P and C parities. We are now exploring the possibility of exploiting toponium as a probe of new physics beyond the SM.
报告人简介：Kaoru Hagiwara, 日本高能加速器研究机构(KEK)名誉教授。1979年于日本东京都立大学获得博士学位，随后在美国威斯康星大学麦迪逊分校，德国电子加速器中心(DESY)和英国达拉姆大学做研究员。1986年开始在KEK工作，并于2015年成为名誉教授。