Description
Long-Lived Particles (LLPs) have strong potential to explain some of the missing components of the Standard Model (SM), such as the nature of Dark Matter (DM) and the origin of the neutrino masses via the seesaw mechanism. The ANUBIS experiment is a dedicated transverse detector, located above the ATLAS Interaction Point (IP) at the LHC, designed to probe particles with proper lifetimes τ > 100 ps.
One of the most well-motivated Beyond the Standard Model (BSM) scenarios featuring an LLP is the Heavy Neutral Lepton (HNL) model.
In this work, a sensitivity study is performed to evaluate the detection potential of ANUBIS to HNLs, focusing specifically on HNLs coupled to the third-generation lepton (τ) using the SET-ANUBIS framework.
This scenario is particularly interesting for its unconstrained parameter space and in terms of its complementarity with previously conducted studies that focus on HNLs coupled to the first and second lepton generations (e and μ).
Preliminary results of sensitivity projections and exclusion contours in the ($m_{N_1}$, $|V_{{N_1}τ}|^2$) parameter space will be presented.
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