  By considering its generalization to composite J=0 mesons proposed in a
previous work [1], I show how and why a chiral extension of the
Glashow-Salam-Weinberg standard model of electroweak interactions calls, there,
for right-handed charged W_R's coupled with g_R = e/cos(theta_W), and the
masses of which are related to the ones of the left-handed W_L's through the
relation M_L^2 + M_R^2 = M_Z^2. The mesonic sector, having vanishing baryonic
and leptonic number, is neutral with respect to the corresponding U(1)
symmetries, making the natural chiral gauge group to be [SU(2)left x
SU(2)right], blind to the presence of extra Z's. The W_R gauge bosons cannot
have been detected in hadronic colliders and can be very elusive in electroweak
processes involving, in particular, pseudoscalar mesons. Present data select
one among two possible extensions for which, in the right sector: - a specific
breaking of universality occurs between families of quarks, which belong to
inequivalent representations of SU(2)right; - the mixing angle is a free
parameter, constrained to be smaller than the Cabibbo angle by the box diagrams
controlling the K_L-K_S mass difference; this also minimizes contributions to
muon -> electron + photon. The relation g_L^2/M_L^2 = g_R^2/M_R^2 implements
left-right symmetry for low energy charged effective weak interactions. For the
sake of simplicity, this study is performed for two generations only.
