Molecular states from ${\bar{B}}^{(\ast )}N$ interactions

Zhong-Yi Jian, Hong Qiang Zhu, Feng Yang +3

In 2019, two new structures ${\Lambda }_b(6146)$ and ${\Lambda }_b(6152)$ were observed by the LHCb Collaboration at the invariant mass spectrum of ${\Lambda }_b^0{\pi }^{+}{\pi }^{-}$, which aroused a hot discussion…