Abstract
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 (), connecting the dark sector to the standard model. We present a search for a dark photon in the reaction , , using 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 for dark photon masses in the range . 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.
- Received 12 June 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.201801
© 2014 American Physical Society
Viewpoint
New Light Shed on Dark Photons
Published 10 November 2014
A search for a photonlike particle that could be related to dark matter has come up empty, putting new constraints on models that imagine a dark form of electromagnetism.
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