Abstract
We search for single-photon events in of collision data collected with the BABAR detector at the PEP-II -Factory. We look for events with a single high-energy photon and a large missing momentum and energy, consistent with production of a spin-1 particle through the process ; . Such particles, referred to as “dark photons,” are motivated by theories applying a gauge symmetry to dark matter. We find no evidence for such processes and set 90% confidence level upper limits on the coupling strength of to in the mass range . In particular, our limits exclude the values of the coupling suggested by the dark-photon interpretation of the muon anomaly, as well as a broad range of parameters for the dark-sector models.
- Received 14 February 2017
DOI:https://doi.org/10.1103/PhysRevLett.119.131804
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Dark Photon Conjecture Fizzles
Published 28 September 2017
The lack of so-called “dark photons” in electron-positron collision data rules out scenarios in which these hypothetical particles explain the muon’s magnetic moment.
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