LHC phenomenology with hidden sector dark matter: a long-lived stau and heavy Higgs in an observable range

Understand

The presence of a hidden sector with very weak interactions with the standard model has significant implications on LHC signatures.

• In this work we discuss LHC phenomenology with the inclusion of a hidden sector by a $U(1)$ extension of MSSM/SUGRA.
• We consider both kinetic mixing and Stueckelberg mass mixing between the $U(1)$ gauge field of the hidden sector and $U(1)_Y$ of the visible sector.
• Such a model has an extended parameter space.