TY  - JOUR
AU  - BABAR Collaboration (Lees, J. P. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Villanueva-Perez, P.
PY  - 2014
DA  - 2014//
TI  - Search for a Dark Photon in e(+)e(-) Collisions at BABAR
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 201801
EP  - 8pp
VL  - 113
IS  - 20
PB  - Amer Physical Soc
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(-) ->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.
SN  - 0031-9007
UR  - http://arxiv.org/abs/arXiv:1406.2980
UR  - https://doi.org/10.1103/PhysRevLett.113.201801
DO  - 10.1103/PhysRevLett.113.201801
LA  - English
N1  - WOS:000344919200001
ID  - BABARCollaborationLees_etal2014
ER  -