The impact of lepton-flavor violating Z' bosons on muon g-2 and other muon observables

Physics – High Energy Physics – High Energy Physics - Phenomenology

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17 pages, 6 figures, uses feynMF, edited references (v2), corrected MEGA experimental limit (v3), accepted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.65.055003

A lepton-flavor violating (LFV) Z' boson may mimic some of the phenomena usually attributed to supersymmetric theories. Using a conservative model of LFV Z' bosons, the recent BNL E821 muon g-2 deviation allows for a LFV Z' interpretation with a boson mass up to 4.8 TeV while staying within limits set by muon conversion, mu -> e gamma, and mu -> eee. This model is immediately testable as one to twenty e^+e^- -> mu tau events are predicted for an analysis of the LEP II data. Future muon conversion experiments, MECO and PRIME, are demonstrated to have potential to probe very high boson masses with very small charges, such as a 10 TeV boson with an e-mu charge of 10^-5. Furthermore, the next linear collider is shown to be highly complementary with muon conversion experiments, which are shown to provide the strictest and most relevant bounds on LFV phenomena.

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