We present the prediction of the electroweak $\rho$ parameter and the $W$ boson mass in the CP-violating Next-to-Minimal Supersymmetric extension of the Standard Model (NMSSM) at the two-loop order. The $\rho$ parameter is calculated at the full one-loop and leading and sub-leading two-loop order $\mathcal{O}(\alpha + \alpha_t\alpha_s + \left(\alpha_t+\alpha_\lambda+\alpha_\kappa\right)^2)$....
With the recent computation of cross-section calculations up to the third order in perturbative QCD, and the appearance of the first PDF fits at N3LO (albeit only approximately), it becomes interesting to study if the improved precision is accompanied by an analogue improvement in accuracy in describing experimental data.
To this aim, we calculated the theoretical total cross-sections for...
Following the potential discovery of new heavy particles at the LHC or a future collider, it will be crucial to determine their properties and the nature of the underlying Physics. In this context, the possibility of Beyond-the-Standard-Model (BSM) scalar trilinear couplings is of particular interest.
In this talk, I will consider as a specific example the scalar top (stop) trilinear coupling...
