arXiv subjects

Paulo Areyuna C

Publications and source records attributed to Paulo Areyuna C.

2 recordsLinked to original sources

arXiv2026

Can LLP detectors probe the reheating temperature? A case study of vector dark matter

We study an extension of the singlet-scalar Higgs portal featuring a dark vector $V_μ$ and a real scalar $ϕ$. The vector is a dark matter (DM) candidate, while $ϕ$ is long-lived and decays via higher-dimensional operators. We explore the DM production via freeze-in at low and high reheating temperatures. At colliders, the decay $ϕ\to Z+V$ yields distinctive long-lived particle (LLP) signatures. We explore the interplay between cosmological constraints and LLP searches at the LHC and FCC-hh, showing that far detectors can probe otherwise inaccessible parameter space and place novel bounds on the reheating temperature.

hep-ph↗

arXiv2022

Probing Left-handed Heavy Neutral Leptons on the Massive Vector Doublet Model

In the first part of this thesis, we consider an extension to the Standard Model composed by a Massive Vector Doublet under SU(2)L and a Left-handed Heavy Neutral Lepton. We study the production of these exotic leptons with a Same Flavor Opposite Sign standard lepton pair, and jets. We establish limits on the parameter space considering previous searches in this final state. After the limit definition, we study a modification on the event selection criteria in order to increase the possibility of probing these new particles at the Large Hadron Collider. Finally, we perform a parameter scan considering the new lepton as a dark matter candidate, identifying relevant regions on the parameter space for future studies.

hep-ph↗