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Title: Search for a Dark Photon in e + e - Collisions atBaBar

Journal Article · · Physical Review Letters
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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 of10-4-10-3 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.

Sponsoring Organization:
USDOE
OSTI ID:
1180224
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 113 Journal Issue: 20; ISSN 0031-9007
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 306 works
Citation information provided by
Web of Science

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