Abstract

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 .

Notes

Originally posted at http://arxiv.org/abs/hep-ph/0402047v2. Preprint of an article published in Physics Letters B, v.586 no.3-4, 2004.

Keywords

electro-weak interactions, extra abelian gauge boson, extra gauge boson, hypercharge gauge boson, Stueckelberg mass term, high energy physics

Subject Categories

Particles (Nuclear physics), Bosons, Couplings, Fermions

Disciplines

Physics

Publication Date

2004

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