26-31 July 2021
Mexico City
Mexico/General timezone
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Baryon Spectroscopy

Novel pentaquark picture for Roper-like heavy baryons from chiral symmetry


  • Dr. Daiki SUENAGA

Primary authors



We propose a new type of structure for singly heavy baryons of $Qqq\bar{q}q$ in addition to the conventional one of $Qqq$. Based on chiral symmetry of the light quarks, we find $\Lambda_c(2765)$ and $\Xi_c(2967)$ are mostly $Qqq\bar{q}q$ while $\Lambda_c(2286)$ and $\Xi_c(2470)$ are mostly $Qqq$. The masses of negative-parity baryons are predicted. We also derive a mass formula and the extended Goldberger-Treiman relation that the masses of the baryons satisfy.