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Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 99: Di-Higgs 3 (bbWW)

T 99.2: Talk

Thursday, March 7, 2024, 16:15–16:30, Geb. 30.41: HS 1

Conceptualization and Development of a Boosted Analysis for Run-3 for Higgs boson pair production in the 1-lepton bbWW* final state — •Lina Buschmann, Kira Abeling, and Stan Lai — II. Physikalisches Institut, Georg-August-Universität Göttingen

Since the discovery of the Higgs boson in 2012, many studies have been performed to test its properties against Standard Model (SM) predictions. In particular, a direct measurement of the Higgs self-coupling is important to characterise the Higgs potential.

Furthermore, it is known that there must be physics beyond the SM (BSM). Many BSM theories predict additional, highly massive narrow-width scalars, X, which can resonantly decay to two Higgs bosons, H, enhancing the di-Higgs cross section. Since the mass of X is not predicted by theory in this approach, a wide range of masses, mX, is considered, resulting in various decay topologies.

In this talk, the development of a Run-3 analysis, based on the Run-2 analysis, for HH production in the boosted bbWW* decay channel with the one lepton final state is discussed. Since only large resonant masses are considered, the jets from the W boson decay and the bb decay cannot be resolved completely. This yields a boosted topology and the decay products being collected in two back-to-back large-R jets, where the lepton overlaps with the Whad jet. This channel offers a fairly high branching ratio with a moderate amount of background, dominated by tt events with at least one leptonic top decay.

Keywords: Higgs; Searches; bbVV; Boosted

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