Speaker
Description
We study discovery potential for the heavy right-handed neutrino exchange contribution in the process $l^{+}l^{-} \rightarrow W^{+}W^{-} \rightarrow 4j~(l = e, \mu)$ at future high-energy lepton colliders. Using the Whizard generator and DELPHES detector simulation framework it is shown that after applying cuts the only non-negligible background process from Standard model is $l^{+}l^{-} \rightarrow W^{+}W^{-}$. Generator uses seesaw type-I model to simulate signal. We use angular distributions to distinguish the signal from background due to heavy neutrinos right polarisation. Using a likelihood analysis we obtain upper limits for the mixing
parameter as a function of the heavy neutrino mass for future lepton colliders at $\sqrt{s} = 1,3,10~\text{TeV}$.
