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  • Ablikim, M.Inst High Energy Phys, Beijing 100049, Peoples R China (author)

Measurements of Sigma(+) and Sigma(-) time-like electromagnetic form factors for center-of-mass energies from 2.3864 to 3.0200 GeV

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • Elsevier,2021
  • electronicrdacarrier

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  • LIBRIS-ID:oai:DiVA.org:uu-441001
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-441001URI
  • https://doi.org/10.1016/j.physletb.2021.136110DOI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • For complete list of authors see http://dx.doi.org/10.1016/j.physletb.2021.136110
  • The Born cross sections of the e(+)e(-) -> Sigma(+)(Sigma) over bar (-) and e(+)e(-)-> Sigma(-)(Sigma) over bar (+) processes are determined for centerof-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, vertical bar G(E)/G(M)vertical bar. 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.

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  • Adlarson, PatrikUppsala universitet,Kärnfysik(Swepub:uu)patad399 (author)
  • Biernat, JacekUppsala universitet,Kärnfysik(Swepub:uu)jacbi188 (author)
  • Ikegami Andersson, WalterUppsala universitet,Kärnfysik(Swepub:uu)walan603 (author)
  • Johansson, TordUppsala universitet,Kärnfysik(Swepub:uu)tordjoha (author)
  • Kupsc, AndrzejUppsala universitet,Kärnfysik(Swepub:uu)andrkups (author)
  • Pettersson, JoachimUppsala universitet,Kärnfysik(Swepub:uu)joape785 (author)
  • Schönning, Karin,1978-Uppsala universitet,Kärnfysik(Swepub:uu)kasch734 (author)
  • Thorén, ViktorUppsala universitet,Kärnfysik(Swepub:uu)vikth925 (author)
  • Wolke, MagnusUppsala universitet,Kärnfysik(Swepub:uu)mawol031 (author)
  • Zou, J. H.Inst High Energy Phys, Beijing 100049, Peoples R China (author)
  • Inst High Energy Phys, Beijing 100049, Peoples R ChinaKärnfysik (creator_code:org_t)

Related titles

  • In:Physics Letters B: Elsevier8140370-26931873-2445

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