Oct 18 – 22, 2021
America/New_York timezone

New approaches for hh→bbbb as a probe of Higgs self-coupling

Oct 19, 2021, 3:45 PM
10m
Parallel Sessions Di-Higgs Parallel: Di-Higgs

Speaker

Santiago Rafael Paredes Saenz (Universite Libre de Bruxelles (BE))

Description

Abstract:
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.

Primary authors

Jacob Amacker William Balunas (University of Oxford (GB)) Lydia Audrey Beresford (CERN) Daniela Bortoletto (University of Oxford (GB)) James Frost (University of Oxford (GB)) Cigdem Issever (Humboldt University of Berlin and DESY (DE)) Jesse Liu (University of Chicago) James McKee Alessandro Micheli Santiago Rafael Paredes Saenz (Universite Libre de Bruxelles (BE)) Michael Spannowsky (IPPP Durham) Beojan Stanislaus (CERN)

Presentation materials