Mixing angle between ${}^3{P}_1$ and ${}^1{P}_1$ in HQET

Takayuki Matsuki, Toshiyuki Morii, Kohichi Seo

Some claim that there are two independent mixing angles ($\theta =35.3^{\circ }$, $-54.7^{\circ }$) between ${}^3{P}_1$ and ${}^1{P}_1$ states of heavy-light mesons in heavy quark symmetric limit, an…