Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 26: Higgs physics (theory)

T 26.3: Talk

Tuesday, March 16, 2021, 16:30–16:45, Ta

Effective Field Theory interpretations in Higgs boson pair production studies — •Christina Dimitriadi — Physikalisches Institut Universität Bonn, Germany — Uppsala University, Sweden

After the discovery of the Higgs boson in 2012, searching for the simultaneous production of two Higgs bosons (di-Higgs) in proton-proton collisions would enable us to establish evidence of the Higgs boson self-coupling which is directly linked to the shape of the Higgs potential.

Interpretations in Effective Field Theories (EFT) can be beneficial as they provide new physics contributions in a model-independent way. Two different approaches are popular in di-Higgs, the Higgs EFT (HEFT), which is described by the Electroweak Chiral Lagrangian and the Standard Model EFT (SMEFT), where the SM Lagrangian is extended to higher mass dimensions. Theorists have provided an analytical parametrisation for the total cross-section and the m_hh distribution as a function of the anomalous Higgs couplings including NLO corrections, and weights have been produced and made available. Some intermediate results will be presented concerning HEFT reweighting validation studies.