Implications of the CMS search for W R on grand unification

The cms experiment at the large hadron collider has reported a 2.8σ excess in the (2e)(2jets) channel around 2.1 tev. interpretation of this data is reconsidered in terms of the production of a right-handed weak gauge boson, w r , of the left-right symmetric model and in an so(10) grand unified theory abiding by the extended survival hypothesis. the left-right symmetric model can be consistent with this excess if (a) the heavy right-handed neutrino has a mass near w r , or (b) if g l ≠ g r , or (c) the right-handed ckm matrix is nontrivial. combinations of the above possibilities are also viable. a w r with a mass in the tev region if embedded in so(10) is not compatible with g l = g r . rather, it implies 0.64 ≤ g r /g l ≤ 0.78. further, a unique symmetry-breaking route — the order being left-right discrete symmetry breaking first, followed by su(4) c and finally su(2) r — to the standard model is picked out. the l ↔ r discrete symmetry has to be broken at around 1016 gev. the grand unification scale is pushed to 1018 gev making the detection of proton decay in ongoing searches rather unlikely. the su(4) c breaking scale can be at its allowed lower limit of 106 gev so that $$ n-overline{n} $$ oscillation or flavour changing processes such as k l → μe and b d,s → μe be detectable. the higgs scalar multiplets responsible for so(10) symmetry breaking at various stages are uniquely identified so long as one adheres to a minimalist principle. we also remark, en passant, about a partially unified pati-salam model.