Publication:
Observation of the Dalitz decay eta ' -> gamma e(+)e(-)

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dc.contributor.authorAblikim, M.
dc.contributor.authorAchasov, M. N.
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dc.contributor.authorTang, X.
dc.contributor.authorTapan, I.
dc.contributor.authorThorndike, E. H.
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dc.contributor.authorZhao, Lei
dc.contributor.authorZhao, Ling
dc.contributor.authorZhao, M. G.
dc.contributor.authorZhao, Q.
dc.contributor.authorZhao, Q. W.
dc.contributor.authorZhao, S. J.
dc.contributor.authorZhao, T. C.
dc.contributor.authorZhao, Y. B.
dc.contributor.authorZhao, Z. G.
dc.contributor.authorZhemchugov, A.
dc.contributor.authorZheng, B.
dc.contributor.authorZheng, J. P.
dc.contributor.authorZheng, W. J.
dc.contributor.authorZheng, Y. H.
dc.contributor.authorZhong, B.
dc.contributor.authorZhou, L.
dc.contributor.authorZhou, Li
dc.contributor.authorZhou, X.
dc.contributor.authorZhou, X. K.
dc.contributor.authorZhou, X. R.
dc.contributor.authorZhou, X. Y.
dc.contributor.authorZhu, K.
dc.contributor.authorZhu, K. J.
dc.contributor.authorZhu, S.
dc.contributor.authorZhu, X. L.
dc.contributor.authorZhu, Y. C.
dc.contributor.authorZhu, Y. S.
dc.contributor.authorZhu, Z. A.
dc.contributor.authorZhuang, J.
dc.contributor.authorZotti, L.
dc.contributor.authorZou, B. S.
dc.contributor.authorZou, J. H.
dc.contributor.buuauthorTAPAN, İLHAN
dc.contributor.departmentFen Edebiyat Fakültesi
dc.contributor.departmentFizik Bölümü
dc.contributor.researcheridCCD-9486-2022
dc.date.accessioned2024-08-14T10:22:38Z
dc.date.available2024-08-14T10:22:38Z
dc.date.issued2015-07-01
dc.description.abstractWe report the first observation of the Dalitz decay eta' -> gamma e(+)e(-), based on a data sample of 1.31 billion J/psi events collected with the BESIII detector. The eta' mesons are produced via the J/psi -> gamma eta' decay process. The ratio (eta' -> gamma e(+)e(-))/Gamma (eta' -> gamma gamma) is measured to be (2.13 +/- 0.09(stat) +/- 0.07(sys)) x 10(-2). This corresponds to a branching fraction B(eta' -> gamma e(+)e(-)) = (4.69 +/- 0.20(stat) +/- 0.23(sys)) x 10(-4). The transition form factor is extracted and different expressions are compared to the measured dependence on the e(+)e(-) invariant mass. The results are consistent with the prediction of the vector meson dominance model.
dc.description.sponsorshipNational Basic Research Program of China 2015CB856700
dc.description.sponsorshipNational Natural Science Foundation of China (NSFC) 11125525 11235011 11322544 11335008 11425524
dc.description.sponsorshipChinese Academy of Sciences
dc.description.sponsorshipNational Natural Science Foundation of China (NSFC) 11179007 U1232201 U1332201
dc.description.sponsorshipChinese Academy of Sciences 11179007 U1232201 U1332201 KJCX2-YW-N29 KJCX2-YW-N45
dc.description.sponsorshipINPAC and Shanghai Key Laboratory for Particle Physics and Cosmology
dc.description.sponsorshipGerman Research Foundation (DFG) Collaborative Research Center CRC-1044
dc.description.sponsorshipIstituto Nazionale di Fisica Nucleare (INFN)
dc.description.sponsorshipTürkiye Cumhuriyeti Kalkınma Bakanlığı DPT2006K-120470
dc.description.sponsorshipRussian Foundation for Basic Research (RFBR) Spanish Government 14-07-91152
dc.description.sponsorshipUnited States Department of Energy (DOE) DE-FG02-04ER41291 DE-FG02-05ER41374 DE-FG02-94ER40823 DESC0010118
dc.description.sponsorshipNational Science Foundation (NSF)
dc.description.sponsorshipUniversity of Groningen (RuG), Darmstadt
dc.description.sponsorshipHelmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt
dc.description.sponsorshipNational Research Foundation of Korea R32-2008-000-10155-0
dc.identifier.doi10.1103/PhysRevD.92.012001
dc.identifier.issn2470-0010
dc.identifier.issue1
dc.identifier.scopus2-s2.0-84937135994
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.92.012001
dc.identifier.urihttps://journals.aps.org/prd/abstract/10.1103/PhysRevD.92.012001
dc.identifier.urihttps://hdl.handle.net/11452/44022
dc.identifier.volume92
dc.identifier.wos000357162400002
dc.indexed.wosWOS.SCI
dc.language.isoen
dc.publisherAmer Physical
dc.relation.journalPhysical Review D
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectForm-factors
dc.subjectDominance
dc.subjectPi-0
dc.subjectAstronomy & astrophysics
dc.subjectPhysics
dc.titleObservation of the Dalitz decay eta ' -> gamma e(+)e(-)
dc.typeArticle
dspace.entity.typePublication
local.contributor.departmentFen Edebiyat Fakültesi/Fizik Bölümü
local.indexed.atWOS
local.indexed.atScopus
relation.isAuthorOfPublication197aec07-a4ed-42b7-a3d3-d7476357d6ef
relation.isAuthorOfPublication.latestForDiscovery197aec07-a4ed-42b7-a3d3-d7476357d6ef

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