electron-positron collider implications for the charged singlet Higgs boson.

Left-right symmetric (LRS) models are attractive extensions of the SM with the gauge group being extended to $SU(3)_C \times SU(2)_L \times SU(2)_R \times U(1)_{B-L}$. The parity symmetry is fundamentally conserved in these models which provides a natural solution to the strong CP problem [@scp] without introducing a global Peccei-Quinn symmetry. The parity symmetry is broken once the $SU(2)_R \times U(1)_{B-L}$ is spontaneously broken into $U(1)_Y$ at a scale $v_R$ much above the electroweak scale. Thus the observed parity violation in the SM can be easily understood. The gauge structure of LRS framework naturally requires the existence of right-handed neutrinos which can help generate light neutrino masses through seesaw mechanism. This usually requires the presence of an $SU(2)_R$ triplet scalar whose neutral component acquires a non-zero vacuum expectation value, leading to the right-handed symmetry breaking and the generation of Majorana masses for the right-handed neutrinos. The simplest LRS scenario, on the other hand, requires only an $SU(2)_R$ doublet scalar to achieve a consistent right-handed symmetry breaking but cannot generate light neutrino masses[^1]. A simple LRS framework consisting of two doublets and a bidoublet scalar field, as will be considered here, can only 