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Measurements of Sig...
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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
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Elsevier,2021
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LIBRIS-ID:oai:DiVA.org:uu-441001
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-441001URI
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https://doi.org/10.1016/j.physletb.2021.136110DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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For complete list of authors see http://dx.doi.org/10.1016/j.physletb.2021.136110
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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)
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Biernat, JacekUppsala universitet,Kärnfysik(Swepub:uu)jacbi188
(author)
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Ikegami Andersson, WalterUppsala universitet,Kärnfysik(Swepub:uu)walan603
(author)
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Johansson, TordUppsala universitet,Kärnfysik(Swepub:uu)tordjoha
(author)
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Kupsc, AndrzejUppsala universitet,Kärnfysik(Swepub:uu)andrkups
(author)
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Pettersson, JoachimUppsala universitet,Kärnfysik(Swepub:uu)joape785
(author)
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Schönning, Karin,1978-Uppsala universitet,Kärnfysik(Swepub:uu)kasch734
(author)
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Thorén, ViktorUppsala universitet,Kärnfysik(Swepub:uu)vikth925
(author)
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Wolke, MagnusUppsala universitet,Kärnfysik(Swepub:uu)mawol031
(author)
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Zou, J. H.Inst High Energy Phys, Beijing 100049, Peoples R China
(author)
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Inst High Energy Phys, Beijing 100049, Peoples R ChinaKärnfysik
(creator_code:org_t)
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In:Physics Letters B: Elsevier8140370-26931873-2445
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Ablikim, M.
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Adlarson, Patrik
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Biernat, Jacek
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Kupsc, Andrzej
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Thorén, Viktor
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