Observation of a cross-section enhancement near mass threshold in e(+)e(-) -> Lambda(Lambda)over-bar

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dc.WoS.categoriesAstronomy & Astrophysics; Physics, Particles & Fieldsen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-11-18T09:38:20Z
dc.date.available2020-11-18T09:38:20Z
dc.date.issued2018-02-28
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractThe process e(+)e(-) -> Lambda(Lambda) over bar is studied using data samples at root s = 2.2324, 2.400, 2.800 and 3.080 GeV collected with the BESIII detector operating at the BEPCII collider. The Born cross section is measured at root s = 2.2324 GeV, which is 1.0 MeVabove the Lambda(Lambda) over bar mass threshold, to be 305 +/- 45(-36)(+66) pb, where the first uncertainty is statistical and the second systematic. The cross section near threshold is larger than that expected from theory, which predicts the cross section to vanish at threshold. The Born cross sections at root s = 2.400, 2.800 and 3.080 GeV are measured and found to be consistent with previous experimental results, but with improved precision. Finally, the corresponding effective electromagnetic form factors of Lambda are deduced.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1103/PhysRevD.97.032013
dc.identifier.issn2470-0029
dc.identifier.issn2470-0010
dc.identifier.scopus2-s2.0-85043361468en_US
dc.identifier.urihttps://hdl.handle.net/11411/2669
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.97.032013
dc.identifier.wosWOS:000426322600001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.issue3en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors50+en_US
dc.publisherAMER PHYSICAL SOCen_US
dc.relation.ispartofPHYSICAL REVIEW Den_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectTIME-LIKE REGIONen_US
dc.subjectELECTROMAGNETIC FORM-FACTORSen_US
dc.subjectNEAR-THRESHOLDen_US
dc.subjectP(P)OVER-BARen_US
dc.subjectBESIIIen_US
dc.subjectPROTONen_US
dc.titleObservation of a cross-section enhancement near mass threshold in e(+)e(-) -> Lambda(Lambda)over-bar
dc.typeArticle
dc.volume97en_US

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