Muon g-2 anomaly and dark leptonic gauge boson

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One of the major motivations to search for a dark gauge boson of MeV-GeV scale is the long-standing g(mu) - 2 anomaly. Because of active searches such as fixed target experiments and rare meson decays, the g(mu) - 2 favored parameter region has been rapidly reduced. With the most recent data, it is practically excluded now in the popular dark photon model. We overview the issue and investigate a potentially alternative model based on the gauged lepton number or U(1)(L). The g(mu) - 2 favored parameter region of the U(1)(L) survives all the constraints that were critical in the dark photon case, yet it is disfavored by the new constraints from the large flux neutrino experiments.
Publisher
AMER PHYSICAL SOC
Issue Date
2014-11
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW D, v.90, no.9

ISSN
1550-7998
DOI
10.1103/PhysRevD.90.091702
URI
http://hdl.handle.net/10203/226480
Appears in Collection
PH-Journal Papers(저널논문)
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