Search for Invisible Decays of a Dark Photon Produced in e(+)e(-) Collisions at BABAR



Lees, JP, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, DN, Derdzinski, M, Giuffrida, A, Kolomensky, Yu G
et al (show 227 more authors) (2017) Search for Invisible Decays of a Dark Photon Produced in e(+)e(-) Collisions at BABAR. PHYSICAL REVIEW LETTERS, 119 (13).

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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(-) -> gamma 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 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)(mu) anomaly, as well as a broad range of parameters for the dark-sector models.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 23 Nov 2017 08:15
Last Modified: 18 Jan 2021 15:10
DOI: 10.1103/PhysRevLett.119.131804
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3012702