Uncategorised
-
“Z and Higgs Factory Implications of Two Higgs Doublets with First-Order Phase Transitions” investigates the potential of future electron–positron colliders to probe a specific Higgs sector extension (the so-called two-Higgs-doublet model) that can support a strong first-order electroweak phase transition. This is a key ingredient for electroweak baryogenesis, which is a possible explanation of the…
-
In “A B-anomaly motivated Z′ boson at the energy and precision frontiers”, we perform an in-depth analysis of a specific Z’ boson model (a stipulated heavy sibling of the Z boson of the SM), which could explain anomalies that are currently observed in B-meson decays. We analyse the potential for discovering this Z’ boson at…
-
In “Distorting the Top Resonance with Effective Interactions”, we examine how interference effects in effective field theory (EFT) analyses can alter the expected sensitivity in top-quark pair production at the LHC. The focus is on four-fermion operators, and we assess how these interactions distort (Breit-Wigner) resonance shapes, leading to potential conflicts in reconstruction techniques applied to…
-
In “Electroweak Scalar Effects Beyond Dimension-6 in SMEFT” we explore the impact of heavy scalar fields on the Standard Model Effective Field Theory (SMEFT) by computing effective dimension-eight operators. Focusing on the Two Higgs Doublet Model and the Complex Triplet Scalar Model, we ‘integrate out’ heavy scalar fields at one-loop order in the so-called Green’s…
-
In our recent paper “Impact of New Physics on Momentum-Dependent Particle Widths and Propagators” we investigate how momentum-dependent widths and propagators influence gauge and Higgs bosons, along with the top quark, within the Standard Model (SM) and its SMEFT (Standard Model Effective Field Theory) extensions. We analyse these effects using perturbative resummation techniques. A notable finding is…
christophenglert.uk 