arXiv:hep-ph/0611174·v1·High Energy Physics — Phenomenology
The Z' reconsidered
A. Ferroglia🇩🇪 · A. Lorca🇩🇪 · J.J. van der Bij🇩🇪
Abstract
We consider the extension of the standard model with an arbitrary number of U(1) gauge fields coupled to baryon-minus-lepton number and/or hypercharge. Under the assumption that A^b_FB from the LEP1 experiment is an unlucky fluctuation, we find moderate evidence for the presence of such fields in the precision electroweak data. A relatively large range of the Higgs boson mass is allowed. We discuss the phenomenology of the extra U(1) fields.