# KEK素粒子原子核研究所・理論セミナー（Dr. Jung Chang）

分類 理論セミナー 2019/03/19 (火) 11:00 2019/03/19 (火) 12:00 研究本館1階　会議室1 Forecast for Higgs boson self coupling measurement at the HL-LHC collider Dr. Jung Chang (Chonnam National University) 英語/English sunghak.lim-AT-kek.jp 利用予定なし／0

## 概要

We perform the most up-to-date comprehensive signal-background analysis for the Higgs pair production in the $HH \rightarrow b \bar{b} \gamma\gamma$ channel at the HL-LHC collider. We simulate the signal processes with various values of Higgs boson self coupling $\lambda{3H}/\lambda^{SM}{3H}$ and all the standard-model background processes. We find that the Higgs boson self-coupling is constrained to $-1.5 < \lambda_{3H} < 8.1$ at $95\%$ confidence level after considering the uncertainties associated with the top-Yukawa coupling and the estimation of backgrounds. In this speech, we firstly review the cut-based analysis and introduce our recent improvements using Boosted Decision Trees(BDT).

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