Anticharmed strange pentaquarks from the one-boson-exchange model

Abstract

Inspired by the LHCb's discovery of hidden-charm pentaquarks, the anticharmed strange pentaquarks $P_{\bar{c}s}$ in a favor of the hadronic molecule picture are investigated from the one-boson-exchange model. Similar to the hidden-charm pentaquarks, three molecular bound states, one with spin parity $J^P=1/2^{-}$ below the $\bar{D}\Sigma$ threshold and another two with $J^P=\{1/2^{-},3/2^{-}\}$ below the ${\bar{D}}^{\ast }\Sigma$ threshold, are predicted at $3-3.2$ GeV mass region. The mass ordering of the later two states can be interchanged by different reductions of the $\delta (r)$ term. Furthermore, resonances associated with these three bound states are examined by considering $D_s^{-}N-\bar{D}\Lambda -\bar{D}\Sigma -{\bar{D}}^{\ast }\Lambda -{\bar{D}}^{\ast }\Sigma$ coupled-channel dynamics, and decay widths of them are predicted. Our study indicates that the $D_s^{-}p$ invariant mass spectrum in the ${\bar{B}}_s^0\to \bar{n}{D}_s^{-}p$ decay is an appropriate place to detect the $P_{\bar{c}s}$ pentaquarks.

15 pages, 3 figures and 6 tables

References in corpus (14)

• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Strong LHCb evidence supporting the existence of the hidden-charm molecular pentaquarks
• Is X(3872) a molecule?
• Study of $P_c(4457)$, $P_c(4440)$, and $P_c(4312)$ in a quasipotential Bethe-Salpeter equation approach
• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• Anatomy of the newly observed hidden-charm pentaquark states: $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$
• Explaining the Many Threshold Structures in the Heavy-Quark Hadron Spectrum
• Isospin breaking decays as a diagnosis of the hadronic molecular structure of the $P_c(4457)$
• ${\Lambda }_c^{+}(2940)$: A Possible Molecular State?
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• Can discovery of hidden charm strange pentaquark states help determine the spins of $P_c(4440)$ and $P_c(4457)$?
• The observed charmed hadron ${\Lambda }_c(2940{)}^{+}$ and the $D^{\ast }N$ interaction
• How to reveal the nature of three or more pentaquark states?

Cited by in corpus (8)

• Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$
• Spectrum of the molecular pentaquarks
• Molecular charmed baryons and pentaquarks from light-meson exchange saturation
• $\sigma$ exchange in the one-boson exchange model involving the ground state octet baryons
• Investigation of a candidate spin-$\frac{1}{2}$ hidden-charm triple strange pentaquark state $P_{csss}$
• Molecular states in $D_s^{(\ast )+}{\Xi }_c^{{(}^{\prime },\ast )}$ systems
• Role of the short-range dynamics in the formation of $D^{(\ast )}{\bar{D}}^{(\ast )}/B^{(\ast )}{\bar{B}}^{(\ast )}$ hadronic molecules
• Role of the short-range dynamics in simultaneous interpretation of $P_{cs}$ pentaqurks via ${\Xi }_c^{(\prime ,\ast )}{\bar{D}}^{(\ast )}$ molecules