Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 47: Higgs Physics V

T 47.3: Talk

Wednesday, March 18, 2026, 16:45–17:00, KH 00.014

Status of the HH → bbτ⁻τ⁺ anaylsis with the CMS experiment with Run 3 data — •Ana Andrade, Bogdan Wiederspan, Nathan Prouvost, Marcel Rieger, Moritz Wolf, Tobias Kramer, Quintus Diepholz, Benjamin Le, Jonah Fischer, and Peter Schleper — University of Hamburg

The shape of the Higgs potential plays a crucial role in our understanding of vacuum stability. The potential is directly dependent on the Higgs boson self-coupling which, despite continuous efforts, has yet to be experimentally determined. One way to probe its existence is through double Higgs boson production, where one Higgs boson can directly decay into two Higgs bosons. The predicted cross-section of such a decay depends on the self-coupling strength and can therefore be probed with experimental data. The bbτ⁻τ⁺ final state is a promising candidate to perform such a search, as it offers a good compromise between sufficient statistics and reasonably low background contamination.

This talk summarizes the current status of the HH → bbτ⁻τ⁺ analysis with Run 3 data recorded by the CMS experiment at a center-of-mass energy of √s = 13.6 TeV. The techniques employed in background estimation, signal extraction, and statistical inference will be discussed, amongst other developments. Particularly, we will present recent work in the discriminator network which enhances the search sensitivity.

Keywords: di-higgs; bbtautau; CMS; LHC; Run 3