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T: Fachverband Teilchenphysik

T 10: Higgs: Erweiterte Modelle I

T 10.9: Vortrag

Montag, 19. März 2018, 18:00–18:15, Z6 - HS 0.004

Search for heavy Higgs resonances in the boosted H → hh → WWττ → 1 lepton + jets channel — •Nils Gillwald, Jason Veatch, and Stan Lai — II. Physikalisches Institut, Georg-August-Universität Göttingen

With the discovery of the Higgs boson in 2012, the final elementary particle of the Standard Model was discovered. The observation of Higgs boson pair production would allow a direct measurement of the Higgs potential, which is an important parameter to understand the nature of the Higgs field. Additionally, several BSM models such as two Higgs doublet models and Kaluza-Klein theories predict heavy resonances that can decay into a pair of Higgs bosons.

With a branching ratio of 1.3%, the hh to WWττ channel is the sixth largest di-Higgs decay channel and has never been investigated before. This talk covers an analysis-in-progress on the prospects for searching for boosted di-Higgs events produced via a heavy BSM Higgs resonance in the H → hh → WWττ → 1 lepton + jets channel with the current ATLAS data. The boosted topology is sensitive to high heavy higgs masses and provides excellent suppression of QCD jet background, compensating the small branching ratio of the channel.