报告题目：QBDT, a New BDT Method for High Energy Physics

报告人： 夏力钢 博士 (英国华威大学)

报告时间： 2020年1月2日上午10:30

报告地点： 物理学院新楼5楼多功能厅

报告摘要：

A new Boosted-Decision-Tree method, QBDT, is proposed to reduce the impact of systematic uncertainties for High Energy Physics. The basic idea is to express the signal significance as a function of the nuisance parameters corresponding to the systematic uncertainties, and then to maximize the significance using decision trees. By testing on a toy example pp→h+X→ γττ+X, QBDT is found to reduce the correlation between signal strength and systematic uncertainties compared to the Gradient BDT method. The uncertainty of the signal strength due to the systematic uncertainties is 50-85% fo that using the Gradient BDT..

报告人简介：

2010-2015: PhD, BESIII experiment, Study on isospin-violating decays J/Ψ→Φπ⁰ or Φ3π, Tsinghua University

2015-2017: PostDoc, ATLAS experiment, Searching for LFV Higgs decays and Higgs-mediated FCNC in top quark decays, Tsinghua University

2018-2020: Research Fellow, ATLAS experiment, Searching for scalar resonance using muon pair, radiative HIggs decays and Trigger menu work for data collection, Warwick University

2020- : Research Associate, ATLAS experiment, Di-Higgs search and ITk tracking detector upgrade, Sheffield University

邀请人：孙亮 教授