Properties of $P_c(4312)$ pentaquark and its bottom partner

Abstract

We present an analysis of the newly observed pentaquark $P_c(4312{)}^{+}$ to shed light on its quantum numbers. To do that, the QCD sum rule approach is used. The measured mass of this particle is close to ${\Sigma }_c^{++}{\bar{D}}^{-}$ threshold and has a small width, which supports the possibility of its being a molecular state. We consider an interpolating current in a molecular form and analyze both the positive and negative parity states with spin-$\frac{1}{2}$. We also consider the bottom counterpart of the state with similar molecular form. Our mass result for the charm pentaquark state supports that, the quantum numbers of the observed state are consistent with $J^P={\frac{1}{2}}^{-}$.

9 Pages and3 Tables. To be published in Chinese Physics C

References in corpus (11)

• Strong LHCb evidence supporting the existence of the hidden-charm molecular pentaquarks
• Evidence of Two Resonant Structures in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{h}_c$
• Study of $P_c(4457)$, $P_c(4440)$, and $P_c(4312)$ in a quasipotential Bethe-Salpeter equation approach
• Heavy quark spin symmetric molecular states from ${\bar{D}}^{(\ast )}{\Sigma }_c^{(\ast )}$ and other coupled channels in the light of the recent LHCb pentaquarks
• Observation of Y(2175) in $J/\psi \to \eta \varphi f_0(980)$
• Study of $e^{+}{e}^{-}\to \omega {\chi }_{cJ}$ at center-of-mass energies from 4.21 to 4.42 GeV
• Isospin breaking decays as a diagnosis of the hadronic molecular structure of the $P_c(4457)$
• Interpretation of the Narrow $J/\psi p$ Peaks in ${\Lambda }_b\to J/\psi p{K}^{-}$ Decay in the Compact Diquark Model
• Structure and decays of hidden heavy pentaquarks
• Hidden Bottom Pentaquark States with Spin 3/2 and 5/2
• Study of the hidden charm pentaquarks ${\Lambda }_{c\bar{c}}$ above $4$ GeV

Cited by in corpus (9)

• 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
• Magnetic moments and transition magnetic moments of $P_c$ and $P_{cs}$ states
• Fine Structure of Pentaquark Multiplets in the Dynamical Diquark Model
• Compact hidden charm pentaquark states and QCD isomers
• Anticharmed strange pentaquarks from the one-boson-exchange model
• Investigation of hidden-charm double strange pentaquark candidate $P_{css}$ via its mass and strong decays
• Three-body molecules $\bar{D}{\bar{D}}^{\ast }{\Sigma }_c$- understanding the nature of $T_{cc}$, $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$
• Investigation of a candidate spin-$\frac{1}{2}$ hidden-charm triple strange pentaquark state $P_{csss}$
• Strong decays of the $P_c(4312)$ and its isospin cousin via the QCD sum rules