BESIII reports a novel extraction of hyperon form factors via vacuum polarization enhancement at J/psi, yielding R = 0.860 ± 0.029 ± 0.010 and phase differences of 1.011 ± 0.094 ± 0.010 rad and 2.128 ± 0.094 ± 0.010 rad for the two charge-conjugate channels, with CP symmetry consistent.
Charged tracks are selected in the MDC within ±20 cm of the interaction point in the beam direction and within 10 cm in the plane perpendicular to the beam
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Novel method to extract the femtometer structure of strange baryons using the vacuum polarization effect
BESIII reports a novel extraction of hyperon form factors via vacuum polarization enhancement at J/psi, yielding R = 0.860 ± 0.029 ± 0.010 and phase differences of 1.011 ± 0.094 ± 0.010 rad and 2.128 ± 0.094 ± 0.010 rad for the two charge-conjugate channels, with CP symmetry consistent.