Abstract
We studied an extension of the standard model with a fourth generation of fermions to explain the discrepancy in the muon (g −2) and explain the positron excess seen in the AMS-02 experiment. We introduce a gauged SU(2)HV horizontal symmetry between the muon and the 4th generation lepton families. The 4th generation right-handed neutrino is identified as the dark matter with mass ~ 700GeV. The dark matter annihilates only to (μ + μ −) and (ν C μ ν μ ) states via SU(2)HV gauge boson. The SU(2)HV gauge boson with mass ~ 1.4 TeV gives an adequate contribution to the (g − 2) of muon and fulfill the experimental constraint from BNL measurement. The higgs production constraints from 4th generation fermions is evaded by extending the higgs sector.
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Tomar, G., Mohanty, S. Muon anomalous magnetic moment and positron excess at AMS-02 in a gauged horizontal symmetric model. J. High Energ. Phys. 2014, 133 (2014). https://doi.org/10.1007/JHEP11(2014)133
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DOI: https://doi.org/10.1007/JHEP11(2014)133