Muon anomalous magnetic dipole moment in the $μ$-problem solvable extra U(1) models

Details Muon anomalous magnetic dipole moment in the $μ$-problem solvable extra U(1) models Muon anomalous magnetic dipole moment in the $μ$-problem solvable extra U(1) models

2001-07-30

arxiv.org/abs/hep-ph/0107305v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, latex, 14 figures

Scientific paper

The recent measurement of the muon anomalous magnetic dipole moment shows 2.6$\sigma$ deviation of $a_\mu$ from the standard model prediction which can be explained by a chargino-sneutrino loop correction in the supersymmetric models. In this paper we consider extra U(1) models where the $\mu$ parameter is radiatively generated. This model predicts the sign of $\mu$ is positive in wide parameter regions. But even the 2$\sigma$ constraint causes a serious contradiction to the experimental bound of the extra neutral gauge boson mass. Although a minimal supergravity scenario is ruled out, a very small window is remained as an allowed region for a no-scale model with non-universal gaugino masses.

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