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Determination of th...
Determination of the ∑+ Timelike Electromagnetic Form Factors
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- Ablikim, M. (författare)
- Inst High Energy Phys, Beijing 100049, Peoples R China
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- Adlarson, Patrik (författare)
- Uppsala universitet,Kärnfysik
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- Johansson, Tord (författare)
- Uppsala universitet,Kärnfysik
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- Kupsc, Andrzej (författare)
- Uppsala universitet,Kärnfysik,Natl Ctr Nucl Res, PL-02093 Warsaw, Poland
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- Schönning, Karin, 1978- (författare)
- Uppsala universitet,Kärnfysik
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- Thorén, Viktor (författare)
- Uppsala universitet,Kärnfysik
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- Wolke, Magnus (författare)
- Uppsala universitet,Kärnfysik
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- Zu, J. (författare)
- State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China;Univ Sci & Technol China, Hefei 230026, Peoples R China
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(creator_code:org_t)
- American Physical Society, 2024
- 2024
- Engelska.
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Ingår i: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 132:8
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Based on data samples collected with the BESIII detector at the BEPCII collider, the process e+e- → Σ+Σ− (over bar) is studied at center -of -mass energies √s = 2.3960, 2.6454, and 2.9000 GeV. Using a fully differential angular description of the final state particles, both the relative magnitude and phase information of the Σ+ electromagnetic form factors in the timelike region are extracted. The relative phase between the electric and magnetic form factors is determined to be sin ΔΦ = -0.67 ± 0.29(stat) ± 0.18(syst) at √s = 2.3960 GeV, AO = 55° ± 19°(stat) ± 14°(syst) at √s = 2.6454 GeV, and 78° ± 22°(stat) ± 9°(syst) at √s = 2.9000 GeV. For the first time, the phase of the hyperon electromagnetic form factors is explored in a wide range of four -momentum transfer. The evolution of the phase along with fourmomentum transfer is an important input for understanding its asymptotic behavior and the dynamics of baryons.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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