$P_c(4457{)}^{+}$, $P_c(4440{)}^{+}$, and $P_c(4312{)}^{+}$: molecules or compact pentaquarks?

Jian-Bo Cheng, Yan-Rui Liu

In a chromomagnetic model, we analyse the properties of the newly observed $P_c(4457{)}^{+}$, $P_c(4440{)}^{+}$, and $P_c(4312{)}^{+}$ states. We estimate the masses of the $(uud)_{8_c}(c\bar{…