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.Research output not available from this repository.
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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 |
| URI: | https://wrap.warwick.ac.uk/98199/ |
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