Measurement of $\hat{I}{\pounds }^{+}$ transverse polarization in $e^{+}{e}^{-}$ collisions at $\sqrt{s}=3.68-3.71$ 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 $652.1\mathrm{p}{\mathrm{b}}^{-1}$, we present an energy-dependent measurement of the transverse polarization, relative phase and modulus ratio of the electromagnetic form factors of the $\hat{I}{\pounds }^{+}$ hyperon in the $e^{+}{e}^{-}\to \hat{I}{\pounds }^{+}\bar{\hat{I}}{\pounds }^{-}$ reaction. These results are helpful to understand the production mechanism of the $\hat{I}{\pounds }^{+}$-$\bar{\hat{I}}{\pounds }^{-}$ pairs.

22 pages, 2 tables, 5 figures, consistent with the publication in JHEP12(2024)186