Searching for light new physics at the LHC via lepton-number violation

We study the collider phenomenology of a simplified model containing a right-handed W-R which the W-R couples predominantly to the third generation in the quark sector. The model also includes a light Majorana neutrino, with M-1 similar to O(100) GeV, giving rise to lepton-number-violating signatures that are visible at the LHC. Taking into account all the searches from the LHC and Tevatron, we find that this W-R can still be as light as M-R similar to 300 GeV. We show that this type of new physics, and others like it, can be detected at the LHC using final states with three same-sign same-flavour leptons.

Automated summary

We study the collider phenomenology of a simplified model which includes a right-handed W-R and a light Majorana neutrino, and find that this type of new physics can be detected at the LHC using final states with three same-sign same-flavour leptons.