Search for Invisible Decays of a Dark Photon Produced in e⁺e⁻ Collisions at Babar

dc.contributor.ORCID0000-0003-0867-2189 (Lou, X)en_US
dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.authorLees, J. P.en_US
dc.contributor.authorPoireau, V.en_US
dc.contributor.authorTisserand, V.en_US
dc.contributor.authorGrauges, E.en_US
dc.contributor.authorPalano, A.en_US
dc.contributor.authorEigen, G.en_US
dc.contributor.authorBrown, D. N.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBaBar Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2018-08-24T21:10:02Z
dc.date.available2018-08-24T21:10:02Z
dc.date.created2017-09en_US
dc.date.issued2017-09en_US
dc.description.abstractWe 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.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.identifier.bibliographicCitationLees, J. P., V. Poireau, V. Tisserand, E. Grauges, et al. 2017. "Search for invisible decays of a dark photon produced in e⁺e⁻ collisions at Babar." Physical Review Letters 119(13), doi:10.1103/PhysRevLett.119.131804en_US
dc.identifier.issn0031-9007en_US
dc.identifier.issue13en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/6017
dc.identifier.volume119en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.119.131804
dc.rights©2017 American Physical Societyen_US
dc.sourcePhysical Review Letters
dc.subjectParticle beamsen_US
dc.subjectObserved confidence levels (Statistics)en_US
dc.subjectDark matter (Astronomy)en_US
dc.subjectPhotonsen_US
dc.titleSearch for Invisible Decays of a Dark Photon Produced in e⁺e⁻ Collisions at Babaren_US
dc.type.genrearticleen_US
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