Constraining the Dark Sector with the Mono-jet signature

Several Dark Sector models predict the existence of particles with macroscopic life-times, that can lead to final states with large missing transverse momentum recoiling against at least one highly energetic jet, a signature that is often referred to as a mono-jet. The RECAST framework is used to re-interpret the recent ATLAS mono-jet search, based on 139fb-1 of pp collisions collision data at centre of mass energy of 13 TeV, in terms of Dark Sector models not studied in the original work. Complementary results for models involving Long-Lived Particles are found with respect to dedicated searches.