Gustavo Figueiredo Severiano Alves (IFUSP)

Abstract: In this talk we will discuss how to use pseudoscalar meson leptonic decay data to set stringent limits on the mass of a right-handed vector boson, such as the one that appears in Left-Right symmetric models. For heavy neutral leptons in the mass range 50 < m_N /MeV < 1900 one can constraint m_{WR} > (4 − 19) TeV at 90% CL. This provides the most stringent experimental limits on the W_R mass to date for this HNL mass range.