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

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dc.contributor.authorÇakır, Orhan
dc.contributor.departmentFen Fakültesitr_TR
dc.date.accessioned2019-07-04T07:55:28Z
dc.date.available2019-07-04T07:55:28Z
dc.date.issued2018
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.tr_TR
dc.description.indexWos
dc.description.indexwos
dc.identifier.endpage09tr_TR
dc.identifier.issue03tr_TR
dc.identifier.other10.1103/PhysRevD.97.032013
dc.identifier.startpage01tr_TR
dc.identifier.urihttp://hdl.handle.net/20.500.12575/67292
dc.identifier.volume97tr_TR
dc.language.isoentr_TR
dc.relation.indexWOStr_TR
dc.relation.journalPhysical Review Dtr_TR
dc.subjectTime-like region; electromagnetıc form-factors; near-threshold; p(p)over-bar; BESIII; protontr_TR
dc.titleObservation of a cross-section enhancement near mass threshold in e(+)e(-) -> Lambda(Lambda)over-bartr_TR
dc.typeArticletr_TR

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