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

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