P_c Pentaquarks with Chiral Tensor and Quark Dynamics

We investigate the hidden-charm pentaquarks as superpositions of Lambda(c)(D) over bar(*) and Sigma(()(c)*()) (D) over bar (()*()) b (isospin I = 1/2) meson-baryon channels coupled to a uudc (c) over bar compact core by employing an interaction satisfying the heavy quark and chiral symmetries. Our model can consistently explain the masses and decay widths of P-c(+)(4312), P-c(+)(4440) and P-c(+) (4457) with the dominant components of Sigma(c) (D) over bar and Sigma(c) (D) over bar* with spin-parity assignments J(P) = 1/2(-), 3/2(-) and 1/2(-), respectively. We analyze basic properties of the P-c's such as masses and decay widths, and find that the mass ordering is dominantly determined by the quark dynamics while the decay widths by the tensor force of the one-pion exchange.