Measurement of Σ + transverse polarization in e + e − collisions at s = 3. 68 − 3. 71 GeV

Journal article

Using e+e− collision data collected with the BESIII detector at seven energy points ranging from 3.68 to 3.71 GeV and corresponding to an integrated luminosity of 652.1 pb−1, we present an energy-dependent measurement of the transverse polarization, relative phase and modulus ratio of the electromagnetic form factors of the Σ+ hyperon in the e+e− → Σ+Σ¯− reaction. At each energy point, no evident polarization is observed. These results are helpful to understand the production mechanism of the Σ+-Σ¯− pairs.

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Afedulidis, O; Ai, XC

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2024
• Issue: 12
• Article number: 186
• Publication date: 2024-12-27
• Acceptance date: 2024-12-03
• DOI: 10.1007/jhep12(2024)186
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: Polarization; e+-e− Experiments; QCD