An extension of the standard model of electro-weak interactions by an extra abelian gauge boson is given, in which the extra gauge boson and the hypercharge gauge boson both couple to an axionic scalar in a form that leads to a Stueckelberg mass term. The theory leads to a massive Z′ whose couplings to fermions are uniquely determined and suppressed by small mixing angles. Such a Z′ could have a low mass and appear in e+e− collisions as a sharp resonance. The branching ratios into f ¯ f species, and the forward-backward asymmetry are found to have distinctive features. The model also predicts a new unit of electric charge e′ = Q′e, where Q′ is in general irrational, in the coupling of the photon with hidden matter that is neutral under SU(2)L × U(1)Y .
electro-weak interactions, extra abelian gauge boson, extra gauge boson, hypercharge gauge boson, Stueckelberg mass term, high energy physics
Particles (Nuclear physics), Bosons, Couplings, Fermions
Körs, Boris and Nath, Pran, "A Stueckelberg extension of the standard model" (2004). Physics Faculty Publications. Paper 13. http://hdl.handle.net/2047/d20000366
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