Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 59: Extended Higgs models II

T 59.2: Vortrag

Mittwoch, 17. März 2021, 16:15–16:30, Ti

Event selection optimization in the X→ SH→ bb WW analysis with √s=13 TeV ATLAS data — •Naman Kumar Bhalla, Kira Abeling, Jason Veatch, and Stan Lai — II. Physikaliches Institut, Georg-August-Universität Göttingen

Pair production of the Higgs boson, H, offers a direct measurement of the Higgs potential and is hence a crucial probe for the nature of the Standard Model. Additionally, many Beyond Standard Model scenarios predict heavy resonances, X, with a possible decay to a pair of Higgs bosons. Furthermore, theories such as the “Two Real Scalar Singlet” extension of the Standard model, predict a possible decay of X into another scalar, S, along with a Higgs Boson. The Higgs boson can further decay into a pair of b-quarks while S, with sufficient mass, can decay into a pair of on-shell W bosons. Here, the case where one W boson decays hadronically and the other W boson decays leptonically is considered.

Depending on the relation between the masses of the two additional scalars, m_X and m_S, the kinematic properties of the final state products may differ significantly from X→ HH→ bb WW^* decays. Hence, the methods used for event selection such as the classification of the jets observed from the hadronic decay of the W boson and those from the decay of the Higgs boson to a pair of b-quarks are investigated and re-optimized for the X→ SH topology. This talk presents studies performed to optimize such event selection techniques.