%0 Journal Article
%T Search for a Dark Photon in e(+)e(-) Collisions at BABAR
%A BABAR Collaboration (Lees, J. P. et al
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Villanueva-Perez, P.
%J Physical Review Letters
%D 2014
%V 113
%N 20
%I Amer Physical Soc
%@ 0031-9007
%G English
%F BABARCollaborationLees_etal2014
%O WOS:000344919200001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2004), last updated on Thu, 11 Dec 2014 12:53:42 +0000
%X 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(-) ->gamma A', A' -> e(+)e(-), mu(+) mu(-) 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.
%R 10.1103/PhysRevLett.113.201801
%U http://arxiv.org/abs/arXiv:1406.2980
%U https://doi.org/10.1103/PhysRevLett.113.201801
%P 201801-8pp