Radiative $E1$ transitions between ${}^3{P}_1$ and ${}^3{S}_1$ quarkonium states

Vaishali Guleria, Eshete Gebrehana, Shashank Bhatnagar

In this work we study the E1 decay processes, ${}^3{P}_1$ $\to$ ${}^3{S}_1\gamma$, and ${}^3{S}_1$ $\to$ ${}^3{P}_1\gamma$ in the framework of Bethe-Salpeter equation and calculate their dec…