A bstract We consider the minimal see-saw extension of the Standard Model with two right-
handed singlet fermions N 1, 2 with mass at the GeV scale, augmented by an effective …

A bstract This paper describes a search for dark photons (γ d) in proton-proton collisions
at\(\sqrt {s}\)= 13 TeV at the Large Hadron Collider (LHC). The dark photons are searched for …

A search is presented for displaced production of Higgs bosons or $ Z $ bosons, originating
from the decay of a neutral long-lived particle (LLP) and reconstructed in the decay modes …

A bstract The Dimension-5 Seesaw Portal is a Type-I Seesaw model extended by d= 5
operators involving the sterile neutrino states, leading to new interactions between all …

We present a recast in different benchmark models of the recent CMS search that uses the
end cap muon detector system to identify displaced showers produced by decays of long …

A bstract The addition of d= 5 operators to the Seesaw model leads to the Dimension-5
Seesaw Portal. Here, two new operators provide interactions for the heavy sterile neutrinos …

Extending the Higgs sector of the standard model (SM) by just one additional Higgs doublet
field leads to the two-Higgs-doublet model (2HDM). In the type-I Z 2-symmetric limit of the …

Clusters of topologically connected calorimeter cells around cells with large absolute signal-
to-noise ratio (topo-clusters) are the basis for calorimeter signal reconstruction in the ATLAS …

We explore long-lived particle (LLP) searches using non-pointing photons at the LHC as a
probe for sterile-to-sterile and active-to-sterile transition magnetic dipole moments of sterile …

The axino, the supersymmetric partner of the axion, is a well-motivated warm/hot dark/cold
matter candidate and provides a natural solution to the relic density problem for the binolike …