Polarization transfer in ${\psi }^{\prime }\to \psi \pi \pi$: a complete spin density matrix analysis framework

Jiabao Gong, Guanyu Wang, Dongyu Yuan +7

A theoretical framework based on the Spin Density Matrix (SDM) formalism is developed to describe polarization transfer in the decay chain $e^+e^- \rightarrow ψ^\prime \rightarrow…