NNV section for (astro)particle physics fall meeting

Probing the Higgs self-coupling in the HH→bb¯γγ channel

8 Nov 2024, 12:20

20m

Kontakt der Kontinenten

Parallel Sessions (I)

Speaker

Alexandra Sidley

Description

Since its discovery in 2012, measurements of the properties and couplings of the Higgs boson have been at the forefront of LHC physics. The trilinear self-coupling of the Higgs boson $\lambda$ determines the shape of the Higgs potential, and deviations of its value from the Standard Model prediction may point to new physics. $\lambda$ can be probed experimentally via diHiggs (HH) production. This talk presents a search for HH production with b-quark and photon pairs in the final state using the full Run 2 and partial Run 3 ATLAS datasets. The analysis strategy, key improvements from the Run 2 analysis and the published Run 2 results for the HH production cross-section and ${\kappa }_{\lambda }$ limits will be shown.

Presentation materials

diHiggs_NNV_2024.pdf