TY - JOUR
T1 - Search for a Dark Photon in e(+)e(-) Collisions at BABAR
AU - Lees, J.P.
AU - Raven, H.G.
AU - BARBAR, Collaboration
PY - 2014
Y1 - 2014
N2 - 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 514fb-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 0.02-10.2GeV. 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.
AB - 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 514fb-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 0.02-10.2GeV. 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.
U2 - 10.1103/PhysRevLett.113.201801
DO - 10.1103/PhysRevLett.113.201801
M3 - Article
SN - 0031-9007
VL - 113
JO - Physical Review Letters
JF - Physical Review Letters
IS - 20
M1 - 201801
ER -