Experimental constraints on the properties of $P_c$ states

Abstract

Using new experimental data on photoproduction and ${\Lambda }_b^0$ decays, we derive constraints on the properties of the LHCb $P_c$ states. We conclude that $P_c(4312)$, $P_c(4380)$ and $P_c(4440)$ can be described as ${\Sigma }_c\bar{D}$, ${\Sigma }_c^{\ast }\bar{D}$ and ${\Sigma }_c{\bar{D}}^{\ast }$ molecules, but that $P_c(4457)$ does not fit into the same picture. Based on the apparent absence of additional partner states, and the striking disparity between ${\Lambda }_c^{+}{\bar{D}}^0$ and ${\Lambda }_c^{+}{\bar{D}}^{\ast 0}$ decays, we conclude that $P_c(4440)$ has $3/2^{-}$ quantum numbers. Using heavy-quark symmetry we predict large experimental signals for $P_c$ states in ${\eta }_{c}p{K}^{-}$, ${\Lambda }_c^{+}{\bar{D}}^{\ast 0}{K}^{-}$, and ${\Sigma }_c^{(\ast )}\bar{D}{K}^{-}$. We also argue that current experimental data on photoproduction is almost at the level of sensitivity required to observe $P_c$ states.

27 pages, 4 figures, minor revisions for journal

References in corpus (10)

• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Emergence of a complete heavy-quark spin symmetry multiplet: seven molecular pentaquarks in light of the latest LHCb analysis
• Strong LHCb evidence supporting the existence of the hidden-charm molecular pentaquarks
• 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
• Anatomy of the newly observed hidden-charm pentaquark states: $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$
• Structure and decays of hidden heavy pentaquarks
• Hidden Charm Pentaquark $P_c(4380)$ and Doubly Charmed Baryon ${\Xi }_{cc}^{\ast }(4380)$ as Hadronic Molecule States
• Decays of Pentaquarks in Hadrocharmonium and Molecular Pictures
• Search for Hidden-Charm Pentaquark with CLAS12

Cited by in corpus (14)

• The LHCb state $P_{\psi s}^{\Lambda }(4338)$ as a triangle singularity
• Production of $P_c$ states in ${\Lambda }_b$ decays
• Fully-charm and -bottom pentaquarks in a Lattice-QCD inspired quark model
• The new $P_{\mathrm{cs}}(4459)$, $Z_{\mathrm{cs}}(3985)$, $Z_{\mathrm{cs}}(4000)$ and $Z_{\mathrm{cs}}(4220)$ and the possible emergence of flavor pentaquark octets and tetraquark nonets
• Masses and magnetic moments of exotic fully heavy pentaquarks
• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom
• Search for hidden-charm pentaquark states in three-body final states
• Strong decays of $P_{\psi }^N(4312{)}^{+}$ to $J/\psi ({\eta }_c)p$ and ${\bar{D}}^{(\ast )}{\Lambda }_c$ within the Bethe-Salpeter framework
• Unravelling Pentaquarks with Born--Oppenheimer effective theory
• Substructure of Multiquark Hadrons (Snowmass 2021 White Paper)
• Molecular $P_{\psi }$ pentaquarks from light-meson exchange saturation
• First observation of ${\Lambda }_b^0\to {\Sigma }_c^{(\ast )++}{D}^{(\ast )-}{K}^{-}$ decays
• Tetraquark mass relations in quark and diquark models
• Strong decays of $P_{\psi }^N(4440{)}^{+}$ and $P_{\psi }^N(4457{)}^{+}$ within the Bethe-Salpeter framework