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http://hdl.handle.net/2445/132628
Title: | Search for Invisible Decays of a Dark Photon Produced in e+e− Collisions at BaBar |
Author: | Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 28-Sep-2017 |
Publisher: | American Physical Society |
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-→γ A' ; 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 mA'≤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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.119.131804 |
It is part of: | Physical Review Letters, 2017, vol. 119, num. 13, p. 131804 |
URI: | http://hdl.handle.net/2445/132628 |
Related resource: | https://doi.org/10.1103/PhysRevLett.119.131804 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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