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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/133066
Search for a Dark Photon in e+e− Collisions at BaBar
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Dark sectors charged under a new Abelian interaction have recently received much attention in the context of dark matter models. These models introduce a light new mediator, the so-called dark photon (A′), connecting the dark sector to the standard model. We present a search for a dark photon in the reaction e+e−→γA′, A′→e+e−, μ+μ− using 514 fb−1 of data collected with the BABAR detector. We observe no statistically significant deviations from the standard model predictions, and we set 90% confidence level upper limits on the mixing strength between the photon and dark photon at the level of 10−4−10−3 for dark photon masses in the range 0.02-10.2 GeV. We further constrain the range of the parameter space favored by interpretations of the discrepancy between the calculated and measured anomalous magnetic moment of the muon.
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GRAUGÉS POUS, Eugeni and BABAR Collaboration. Search for a Dark Photon in e+e− Collisions at BaBar. Physical Review Letters. 2014. Vol. 113, num. 20, pags. 201801. ISSN 0031-9007. [consulted: 16 of June of 2026]. Available at: https://hdl.handle.net/2445/133066