Electroweak theories based on gauge groups SU(2)L×U(1)×U(1)×U(1) arising from the spontaneous breakdown of E6 are examined. The neutral-current interactions at low Q2 in two such three-Z models are derived. One neutral boson with a mass a few percent lighter than the standard-model Z0 mass and two additional Z's as light as 300 GeV-1 TeV are allowed.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)