Determination of Spin-parity Quantum Numbers for the Narrow Structure Near the $p\bar{\Lambda }$ Threshold in $e^{+}{e}^{-}\to p{K}^{-}\bar{\Lambda }+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +593

A narrow structure in the $p\bar{\Lambda }$ system near the mass threshold, named as $X(2085)$, is observed in the process $e^{+}{e}^{-}\to p{K}^{-}\bar{\Lambda }$ with a statistical significance greater th…