This document summarises the current theoretical and experimental status of the di-Higgs
boson production searches, and of the direct and indirect constraints on the Higgs boson …

A search for heavy neutral lepton (N) production in K+→ e+ N decays using the data sample
collected by the NA62 experiment at CERN in 2017–2018 is reported. Upper limits of the …

We present benchmark scenarios for searches for an additional Higgs state in the real Higgs
singlet extension of the Standard Model in Run 2 of the LHC. The scenarios are selected …

A bstract In the Higgs portal framework, the Higgs field generally mixes with the Standard
Model (SM) singlet leading to the existence of two states, one of which is identified with the …

A bstract We perform a global fit of the extended scalar singlet model with a fermionic dark
matter (DM) candidate. Using the most up-to-date results from the Planck measured DM relic …

A bstract Precise measurements of SM particles properties at the LHC allows to look for
heavy New Physics in the context of an Effective Field Theory (EFT). These searches …

In order to answer the question on how much the trilinear Higgs self-coupling could deviate
from its Standard Model value in weakly coupled models, we study both theoretical and …

A bstract The presence of extra scalar singlets is a feature of several motivated extensions of
the Standard Model, and the mixing of such a singlet with the Higgs boson is allowed to be …

A bstract Fermion dark matter (DM) interacting with the standard model through a Higgs
portal requires non-renormalizable operators, signaling the presence of new mediator states …

The simplest extension of the standard model is to add a gauge singlet scalar, S: the singlet-
extended standard model. In the absence of a Z 2 symmetry S→-S and if the new scalar is …