Muon anomalous g-2 and gauged L(muon) - L(tau) models

摘要: In this paper we study the Z' contribution to g-2 of muon anomalous magnetic dipole moment in gauged U(1){sub L{sub {mu}}-L{sub {tau}}} models. Here i} are lepton numbers. We find that there three classes models which can produce a large value account for possible discrepancy between experimental data and standard model prediction. The as follows: (a) Models with an exact {tau}}}. these models, is massless. new gauge interaction coupling ea/cos {theta}{sub W} constrained be 0.8 x 10{sup -3}<|a|<2.24 -3}. (b) broken breaking scale not related electroweak symmetry scale. boson massive. allowed range mass constrained, but large. (c) case {approx}1.2 GeV. interesting signatures {mu}{sup +}{mu}{sup -}{yields}{mu}{sup -},{tau}{sup +}{tau}{sup -}