Search for a dark photon in e+e- collisions at BABAR

Abstract

Dark sectors charged under a new Abelian force 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- -> gamma A', A'-> e+e-, mu+mu- using 514 fb-1 of data collected with the BABAR detector. We do not observe a significant signal 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.

7 pages, 7 figures, to appear in PRL, published version

References in corpus (12)

• Observation of an anomalous positron abundance in the cosmic radiation
• A Theory of Dark Matter
• Secluded WIMP Dark Matter
• Secluded U(1) below the weak scale
• New Fixed-Target Experiments to Search for Dark Gauge Forces
• Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal
• New Limits on Hidden Photons from Past Electron Beam Dumps
• Probing a Secluded U(1) at B-factories
• Probing Dark Forces and Light Hidden Sectors at Low-Energy e+e- Colliders
• Search for light massive gauge bosons as an explanation of the $(g-2{)}_{\mu }$ anomaly at MAMI
• Constraints on Hidden Photon Models from Electron g-2 and Hydrogen Spectroscopy
• Search for light vector boson production in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}\gamma$ interactions with the KLOE experiment

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