Search for a Dark Photon in e⁺e⁻ Collisions at Babar

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Search for a Dark Photon in e⁺e⁻ Collisions at Babar

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Title: Search for a Dark Photon in e⁺e⁻ Collisions at Babar
Author(s):
Lees, J. P.;
Poireau, V.;
Tisserand, V.;
Grauges, E.;
Palano, A.;
Eigen, G.;
Stugu, B.;
Izen, Joseph M.;
Lou, Xinchou;
BaBar Collaboration
Date Created: 2014-11-10
Format: Text
Item Type: Article
Keywords: Dark photons
Muons
Electrons
Abelian interactions
Description: Includes supplementary material
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 (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.
Publisher: American Physical Society
ISSN: 0031-9007
Source: Physical Review Letters
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevLett.113.201801
Persistent Link: http://hdl.handle.net/10735.1/4256
Bibliographic Citation: Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, et al. 2014. "Search for a dark photon in e⁺e⁻ collisions at BABAR." Physical Review Letters 113(20), doi:10.1103/PhysRevLett.113.201801
Terms of Use: ©2014 American Physical Society

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