Implications of the muon anomalous magnetic moment in a doublet left-right symmetric model

We compute the complete set of one-loop contributions to the muon anomalous magnetic moment, aμ=(g-2)μ/2 a μ = ( g - 2 ) μ / 2 , in the doublet left-right symmetric model (DLRSM), based on the gauge group SU(2)L⊗ SU(2)R⊗ U(1)B-L S U ( 2 ) L ⊗ S U ( 2 ) R ⊗ U ( 1 ) B - L with neutrino masses generated via the inverse seesaw (ISS) mechanism. We evaluate all four one-loop topologies VFF, SFF, FVV, and FSS arising from the extended gauge bosons ( W W ′ , Z Z ′ ), the new scalar sector ( H₃⁰ H 3 0 , A₁⁰ A 1 0 , HR± H R ± , HL± H L ± ), and the heavy neutrino spectrum generated by the ISS mechanism, using the Casas–Ibarra parametrization to express the neutrino mixing in terms of physical observables. Imposing the experimental bound on aμ Δ a μ , we find a lower bound vR > rsim 1 v R ≳ 1 TeV, corresponding to m_W > rsim 325 m W ′ ≳ 325