The physics of heavy Z^{'} gauge bosons
Abstract
The U(1)^{'} symmetry associated with a possible heavy Z^{'} would have profound implications for particle physics and cosmology. The motivations for such particles in various extensions of the standard model, possible ranges for their masses and couplings, and classes of anomalyfree models are discussed. Present limits from electroweak and collider experiments are briefly surveyed, as are prospects for discovery and diagnostic study at future colliders. Implications of a Z^{'} are discussed, including an extended Higgs sector, extended neutralino sector, and solution to the μ problem in supersymmetry; exotic fermions needed for anomaly cancellation; possible flavor changing neutral current effects; neutrino mass; possible Z^{'} mediation of supersymmetry breaking; and cosmological implications for cold dark matter and electroweak baryogenesis.
 Publication:

Reviews of Modern Physics
 Pub Date:
 July 2009
 DOI:
 10.1103/RevModPhys.81.1199
 arXiv:
 arXiv:0801.1345
 Bibcode:
 2009RvMP...81.1199L
 Keywords:

 12.60.Cn;
 12.60.Fr;
 14.70.Pw;
 Extensions of electroweak gauge sector;
 Extensions of electroweak Higgs sector;
 Other gauge bosons;
 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment;
 High Energy Physics  Theory
 EPrint:
 31 pages, 2 figures, final version for Rev. Mod. Phys., reformatted, references updated and added, minor changes