BaBar Collaboration (Including:

). (2017) Search for invisible decays of a dark photon produced in e^{+}e^{-} collisions at BaBar. Physical review letters, 119 (13). 131804. doi:10.1103/PhysRevLett.119.131804 ISSN 1079-7114.

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Abstract

We search for single-photon events in 53  fb^{-1} of e^{+}e^{-} collision data collected with the BABAR detector at the PEP-II B-Factory. We look for events with a single high-energy photon and a large missing momentum and energy, consistent with production of a spin-1 particle A^{'} through the process e^{+}e^{-}→γA^{'}; A^{'}→invisible. Such particles, referred to as "dark photons," are motivated by theories applying a U(1) gauge symmetry to dark matter. We find no evidence for such processes and set 90% confidence level upper limits on the coupling strength of A^{'} to e^{+}e^{-} in the mass range m_{A^{'}}≤8  GeV. In particular, our limits exclude the values of the A^{'} coupling suggested by the dark-photon interpretation of the muon (g-2)_{μ} anomaly, as well as a broad range of parameters for the dark-sector models.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
SWORD Depositor:	Library Publications Router
Journal or Publication Title:	Physical review letters
ISSN:	1079-7114
Official Date:	28 September 2017
Dates:	Date Event 28 September 2017 Published
Volume:	119
Number:	13
Article Number:	131804
DOI:	10.1103/PhysRevLett.119.131804
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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