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    Measurement of Σ+ transverse polarization in e + e − collisions at s s \sqrt{s} = 3.68 − 3.71 GeV

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    Abstract 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 ¯ − Σ+Σ {\Sigma}^{+}{\overline{\Sigma}}^{-} reaction. At each energy point, no evident polarization is observed. These results are helpful to understand the production mechanism of the Σ+- Σ ¯ − Σ {\overline{\Sigma}}^{-} pairs
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