We are interested in muon interactions - cosmic ray muons striking the ground in our case - producing backward-going neutrals that then decay. This has the potential to mimic exotic long-lived particles produced at the LHC which penetrate the ~100-m of rock and decay in a surface detector volume.
Can you advise which physics models are best suited for this use case? It would be great if you can also point us to the underlying measurements used to validate this part of the physics model. Thanks!