Speaker
Description
Searches for final states with large missing transverse momentum recoiling against a jet or a hadronically decaying vector boson provide strong constraints on a wide range of physics scenarios beyond the Standard Model. This contribution presents a reinterpretation of existing ATLAS and CMS monojet and mono-V searches at center-of-mass energy of 13 TeV in the context of excited-neutrino production. Published signal-region selections, post-fit background estimates, observed event yields, and simulated excited-neutrino signal samples are used to derive upper limits on the production cross section as a function of the excited-neutrino mass. The monojet searches probe excited-neutrino masses up to approximately 4 TeV for representative benchmark scenarios, while the mono-V searches provide complementary sensitivity in regions of parameter space with large couplings to the Standard Model electroweak gauge bosons and excited-neutrino masses below the compositeness scale. The reinterpretation demonstrates how existing LHC searches can be used to constrain excited-neutrino models beyond their original scope.