The signal strength of CP-odd spin zero states in the Model of Electroweak-scale Right-handed Neutrinos at LHC

We analyze and compute the signal strength of one CP-odd spin zero state in the model of electroweak scaled right-handed neutrinos ( $EW\nu_R$ ) model. The signal strength is investigated in various major channels at LHC, $\gamma\gamma$, VV, and b$\bar{b}$. With the high statistic in $\gamma\gamma$ channel, we can have an exclusive region, $130 \div 150 \;GeV$ for this CP-odd scalar. We also show an interesting decay mode which mimics WW process. From that, an upper limit for coupling of a singlet with right-handed doublets is imposed.