1 Ocak 2021 Dergi makalesi Açık Erişim

CERN İşbirliği

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2021-01-01</dc:date>
  <dc:description>The Born cross sections of the ${e}^{+}{e}^{-}\to {\Sigma }^{+}{\overline{\Sigma }}^{-}$ and ${e}^{+}{e}^{-}\to {\Sigma }^{-}{\overline{\Sigma }}^{+}$ processes are determined for center-of-mass energy from 2.3864 to 3.0200 GeV with the BESIII detector. The cross section lineshapes can be described properly by a pQCD function and the resulting ratio of effective form factors for the ${\Sigma }^{+}$ and ${\Sigma }^{-}$ is consistent with 3. In addition, ratios of the ${\Sigma }^{+}$ electric and magnetic form factors, $|{G}_{E}/{G}_{M}|$, are obtained at three center-of-mass energies through an analysis of the angular distributions. These measurements, which are studied for the first time in the off-resonance region, provide precision experimental input for understanding baryonic structure. The observed new features of the ${\Sigma }^{±}$ form factors require more theoretical discussions for the hyperons.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/240548</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:240548</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>Physics Letters B 814 C</dc:source>
  <dc:title>Measurements of Σ And σ time-like electromagnetic form factors for center-of-mass energies from 2.3864 to 3.0200 GeV</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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