Digesh Raut
(University of Alabama)
A certain class of new physics models includes long-lived, electrically charge-neutral particles. A displaced vertex is a spectacular signature to probe such particles productions at the high energy colliders, with almost zero background. In the context the minimal gauged extended Standard Model (SM), we consider a pair creation of Majorana right-handed neutrinos (RHNs) at the high energy colliders through the production of the SM and the Higgs bosons and their subsequent decays into RHNs. With parameters reproducing the neutrino oscillation data, we show that the RHNs are long-lived and their displaced vertex signature can be observed at the next generation displaced vertex search experiments, such as HL-LHC, MATHUSLA, LHeC, and FCC-eh. We find that the lifetime of the RHNs is controlled by the lightest light neutrino mass, which leads to a correlation between the displaced vertex search and the search limit of the future neutrinoless double beta-decay experiments.
Summary
displaced vertex searches at collider
Digesh Raut
(University of Alabama)
Prof.
Nobuchika Okada
SUDIP JANA
(OKLAHOMA STATE UNIVERSITY)