1 Ocak 2021 Dergi makalesi Açık Erişim

CERN İşbirliği

Citation Style Language JSON

{
  "DOI": "10.1016/j.physletb.2021.136110", 
  "abstract": "<p>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 ${\\Sigma }^{\u00b1}$ form factors require more theoretical discussions for the hyperons.</p>", 
  "author": [
    {
      "family": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "container_title": "Physics Letters B", 
  "id": "240548", 
  "issued": {
    "date-parts": [
      [
        2021, 
        1, 
        1
      ]
    ]
  }, 
  "title": "Measurements of \u03a3 And \u03c3 time-like electromagnetic form factors for center-of-mass energies from 2.3864 to 3.0200 GeV", 
  "type": "article-journal", 
  "volume": "814 C"
}