Speaker
Sergey Godunov
(LPI)
Description
We study the process $e^+e^- \to W^+W^-$ in case of seesaw type-I with two implementations of heavy-light neutrino mixing: a linearized mixing approximation applied in popular models and an exact unitary mixing scheme. We conclude that the approximate realization leads to physically incorrect results for this process, while exact unitary mixing provides some signatures that can be experimentally checked at future $e^+e^-$-colliders.
Primary authors
Sergey Godunov
(LPI)
Georgy Chachava
(MIPT)
