Dark Photon Search in the Mass Range between 1.5 and 3.4 GeV/c²

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dc.contributor.ORCID0000-0003-0867-2189 (Lou, X)en_US
dc.contributor.authorAblikim, M.en_US
dc.contributor.authorAchasov, M. N.en_US
dc.contributor.authorAi, X. C.en_US
dc.contributor.authorAlbayrak, O.en_US
dc.contributor.authorAlbrecht, M.en_US
dc.contributor.authorAmbrose, D. J.en_US
dc.contributor.authorAmoroso, A.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBESIII Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2018-10-01T16:50:57Z
dc.date.available2018-10-01T16:50:57Z
dc.date.created2017-11-10en_US
dc.date.issued2018-10-01
dc.description.abstractUsing a data set of 2.93 fb⁻¹ taken at a center-of-mass energy √s = 3.773 GeV with the BESIII detector at the BEPCII collider, we perform a search for an extra U(1) gauge boson, also denoted as a dark photon. We examine the initial state radiation reactions e⁺e⁻ → e⁺e⁻γ(ISR) and e⁺e⁻ → μ⁺μ⁻γ(ISR) for this search, where the dark photon would appear as an enhancement in the invariant mass distribution of the leptonic pairs. We observe no obvious enhancement in the mass range between 1.5 and 3.4 GeV/c² and set a 90% confidence level upper limit on the mixing strength of the dark photon and the Standard Model photon. We obtain a competitive limit in the tested mass range.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.description.sponsorshipen_US
dc.identifier.bibliographicCitationAblikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2017. "Dark photon search in the mass range between 1.5 and 3.4 GeV/c²." Physics Letters B 774, doi:10.1016/j.physletb.2017.09.067en_US
dc.identifier.issn0370-2693en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/6177
dc.identifier.volume774en_US
dc.language.isoenen_US
dc.publisherElsevier Science B.V.en_US
dc.relation.urihttp://dx.doi.org/10.1016/j.physletb.2017.09.067
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2017 The Authorsen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourcePhysics Letters B
dc.subjectPhotonsen_US
dc.subjectElectron beamsen_US
dc.subjectBosonsen_US
dc.subjectParticles (Nuclear physics)--Flavoren_US
dc.subjectCross sections (Nuclear physics)en_US
dc.subjectElectron-positron interactionsen_US
dc.subjectPionsen_US
dc.titleDark Photon Search in the Mass Range between 1.5 and 3.4 GeV/c²en_US
dc.type.genrearticleen_US

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