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We investigate a general U (1) X scenario where we introduce three generations of Standard Model (SM) singlet Right Handed Neutrinos (RHNs) to generate the light neutrino mass through the seesaw mechanism after the breaking of U (1) X and electroweak symmetries. In addition to that, a general U (1) X scenario involves an SM-singlet scalar field and due to the U (1) X symmetry breaking the mass of a neutral beyond the SM (BSM) gauge boson Z^ is evolved. The RHNs, being charged under U (1) X scenario, can explain the origin of observed baryon asymmetry through the resonant leptogenesis process. Applying observed neutrino oscillation data we study Z^ and BSM scalar induced processes to reproduce the observed baryon asymmetry. Hence we estimate bounds on the U (1) X gauge coupling (gX) and the mass of the Z^ (Mₙ^) for different U (1) X charges and benchmark masses of RHN and SM-singlet scalar. Finally we compare our results with limits obtained from the existing limits from LEP-II and LHC. We find that depending on the U (1) X charges, the masses of RHNs and SM-singlet scalar resonant leptogenesis could provide stronger limit on gX for Mₙ^ > 5. 8 TeV which could be probed by high energy scattering experiment in future.
Das et al. (Mon,) studied this question.