Abstract
We discuss the use of massive vectors for the interpretation of some recent experimental anomalies, with special attention to the muon g−2. We restrict our discussion to the case where the massive vector is embedded into a spontaneously broken gauge symmetry, so that the predictions are not affected by the choice of an arbitrary energy cut-off. Extended gauge symmetries, however, typically impose strong constraints on the mass of the new vector boson and for the muon g − 2 they basically rule out, barring the case of abelian gauge extensions, the explanation of the discrepancy in terms of a single vector extension of the standard model. We finally comment on the use of massive vectors for B-meson decay and di-photon anomalies.
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Biggio, C., Bordone, M., Di Luzio, L. et al. Massive vectors and loop observables: the g − 2 case. J. High Energ. Phys. 2016, 2 (2016). https://doi.org/10.1007/JHEP10(2016)002
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DOI: https://doi.org/10.1007/JHEP10(2016)002