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Jul 26 – 30, 2021
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Higgs self-coupling measurements in the HL-LHC era: new approaches for the HH->4b final state.

Jul 27, 2021, 10:55 AM


Parallel session talk Higgs Physics T09: Higgs Physics


Santiago Paredes Saenz (Université Libre de Bruxelles)


Searches for pairs of Higgs bosons will  be, in all likelihood, the best tools to precisely measure the Higgs boson self-coupling $\lambda_{hhh}$ in future colliders. We study various strategies for the $hh\to b \bar{b} b \bar{b}$ search in the HL-LHC era with focus on constraining $\lambda_{hhh}$. We implement a machine-learning-based approach to separate signal and background and apply recent advances in machine learning interpretability, compare the traditional 4 $b$-jet reconstruction to final states with 1 or 2 large-radius jets, and test scenarios with different top-quark Yukawa couplings, among other factors.
Based on arXiv:2004.04240.

Collaboration / Activity Phenomenology Study

Primary authors

Jacob Amacker Dr William Balunas (University of Oxford) Dr Lydia Beresford (CERN) Prof. Daniela BORTOLETTO (University of Oxford) Cigdem Issever (Humboldt-University and DESY) Dr James Frost (University of Oxford) Dr Jesse Liu (University of Chicago) James McKee Alessandro Micheli Santiago Paredes Saenz (Université Libre de Bruxelles) Prof. Michael Spannowsky (IPPP Durham) Dr Beojan Stanislaus (University of Oxford)

Presentation materials