Separating the transverse and longitudinal modes of $\varphi$, $\rho$, $K^{\ast }$ and $K_1$ mesons through their angular-dependent two-body decay modes

In Woo Park, Hiroyuki Sako, Kazuya Aoki +2

The mass shift a spin-1 particle moving in the nuclear medium will depend on its polarization direction. To study polarization-independent mass shifts in the medium, we explore met…