Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-02-04
Phys.Lett. B586 (2004) 366-372
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, no figures. To appear in Physics Letters B
Scientific paper
10.1016/j.physletb.2004.02.051
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 low mass and appear in $e^+e^-$ collisions as a sharp resonance. The branching ratios into $f\bar f$ 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 $SU(2)_L\times U(1)_Y$.
Kors Boris
Nath Pran
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