$P_c(4457)$ interpreted as a $J^P=1/2^{+}$ state by ${\bar{D}}^0{\Lambda }_c^{+}(2595)$-${\pi }^0{P}_c(4312)$ interaction

Abstract

$P_c(4457)$ has been discovered over five years, but the parity of this particle remains undetermined. In this letter we propose a new interpretation for $P_c(4457)$, which is the state generated from the coupled-channel ${\bar{D}}^0{\Lambda }_c^{+}(2595)$ and ${\pi }^0{P}_c(4312)$ since they can exchange an almost on-shell ${\Sigma }_c^{+}$. In this scenario, the parity of $P_c(4457)$ will be positive, which is different from the candidate of the bound state of ${\bar{D}}^{\ast }{\Sigma }_c$. The main decay channel of $P_c(4457)$ in this model is $P_c(4312)\pi$. We propose three processes ${\Lambda }_b^0\to J/\psi K_{s}p{\pi }^{-}$, ${\Lambda }_b^0\to J/\psi K^{-}p{\pi }^0$, and ${\Lambda }_b^0\to J/\psi p{\pi }^{-}{\pi }^{+}{K}^{-}$ to verify $P_c(4457)\to P_c(4312)\pi$.

7 Pages, 2 figures

References in corpus (12)

• Multiquark Resonances
• Pentaquark and Tetraquark states
• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• An updated review of the new hadron states
• Exotics: Heavy Pentaquarks and Tetraquarks
• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Explaining the Many Threshold Structures in the Heavy-Quark Hadron Spectrum
• Evidence for a new structure in the $J/\psi p$ and $J/\psi \bar{p}$ systems in $B_s^0\to J/\psi p\bar{p}$ decays
• Hidden charm N and Delta resonances with heavy-quark symmetry
• A Review on Partial-wave Dynamics with Chiral Effective Field Theory and Dispersion Relation
• Coupled-channel effects of the ${\Sigma }_c^{(\ast )}{\bar{D}}^{(\ast )}$-${\Lambda }_c(2595)\bar{D}$ system and molecular nature of the $P_c$ pentaquark states from one-boson exchange model

Cited by in corpus (2)

• Decay behavior of hidden-strange hadronic molecular state $N(2270)$
• Low-energy $N\varphi$ scattering from a pole-enhanced triangle diagram