Emergence of a complete heavy-quark spin symmetry multiplet: seven molecular pentaquarks in light of the latest LHCb analysis

Abstract

A recent analysis by the LHCb collaboration suggests the existence of three narrow pentaquark-like states --- the $P_c(4312)$,$P_c(4440)$ and $P_c(4457)$ --- instead of just one in the previous analysis (the $P_c(4450)$). The closeness of the $P_c(4312)$ to the $\bar{D}{\Sigma }_c$ threshold and the $P_c(4440)$/$P_c(4457)$ to the ${\bar{D}}^{\ast }{\Sigma }_c$ one suggests a molecular interpretation of these resonances. We show that these three pentaquark-like resonances can be naturally accommodated in a contact-range effective field theory description that incorporates heavy-quark spin symmetry. This description leads to the prediction of all the seven possible S-wave heavy antimeson-baryon molecules (that is, there should be four additional molecular pentaquarks in addition to the $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$), providing the first example of a heavy-quark spin symmetry molecular multiplet that is complete. If this is confirmed, it will not only give us an impressive example of the application of heavy-quark symmetries and effective field theories in hadron physics: it will also uncover a clear and powerful ordering principle for the molecular spectrum, reminiscent of the SU(3)-flavor multiplets to which the light hadron spectrum conforms.

Corresponds to the version to be published in Physical Review Letters; 4 pages, 1 table summarizing the results, the names of the scenarios have been exchanged to reflect their theoretical preference (scenario A now corresponds to the more likely scenario in pionless EFT)

References in corpus (10)

• 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
• The Heavy Quark Spin Symmetry Partners of the X(3872)
• Study of $P_c(4457)$, $P_c(4440)$, and $P_c(4312)$ in a quasipotential Bethe-Salpeter equation approach
• A Discussion on Triangle Singularities in the ${\Lambda }_b\to J/\psi K^{-}p$ Reaction
• Anatomy of the newly observed hidden-charm pentaquark states: $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$
• Heavy-quark spin and flavour symmetry partners of the X(3872) revisited: what can we learn from the one boson exchange model?
• Implications of heavy quark spin symmetry on heavy meson hadronic molecules
• Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV
• Heavy-Quark Symmetry Partners of the Pc(4450) Pentaquark

Cited by in corpus (35)

• Pentaquark and Tetraquark states
• 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
• Interpretation of the LHCb $P_c$ States as Hadronic Molecules and Hints of a Narrow $P_c(4380)$
• Anatomy of the newly observed hidden-charm pentaquark states: $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$
• Spectrum of the strange hidden charm molecular pentaquarks in chiral effective field theory
• Hidden-charm and hidden-bottom molecular pentaquarks in chiral perturbation theory
• Can the newly $P_{cs}(4459)$ be a strange hidden-charm ${\Xi }_c{\bar{D}}^{\ast }$ molecular pentaquarks?
• Possibility to study pentaquark states $P_c(4312),P_c(4440)$, and $P_c(4457)$ in $\gamma p\to J/\psi p$ reaction
• Can discovery of hidden charm strange pentaquark states help determine the spins of $P_c(4440)$ and $P_c(4457)$?
• Analysis of the $P_{cs}(4459)$ as the hidden-charm pentaquark state with QCD sum rules
• Magnetic dipole moments of the hidden-charm pentaquark states: $P_c(4440)$, $P_c(4457)$ and $P_{cs}(4459)$
• Structure and decays of hidden heavy pentaquarks
• Study of the $DK$ interaction with femtoscopic correlation functions
• Doubly charmed molecular pentaquarks
• How to reveal the nature of three or more pentaquark states?
• Hidden charm pentaquark states in a diquark model
• Mass behavior of hidden-charm pentaquarks with open-strange inspired by these established $P_c$ molecular states
• Analysis of the $P_{cs}(4338)$ and related pentaquark molecular states via the QCD sum rules
• Hidden and doubly heavy molecular states from interactions $D_{(s)}^{(\ast )}{\bar{D}}_s^{(\ast )}$/$B_{(s)}^{(\ast )}{\bar{B}}_s^{(\ast )}$ and $D_{(s)}^{(\ast )}{D}_s^{(\ast )}$/$B_{(s)}^{(\ast )}{B}_s^{(\ast )}$
• $QQ\bar{s}\bar{s}$ tetraquarks in the chiral quark model
• Heavy quark spin multiplet structure of $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$
• Is $X(7200)$ the heavy anti-quark diquark symmetry partner of $X(3872)$?
• Photoproduction of strange hidden-charm and hidden-bottom states
• Experimental constraints on the properties of $P_c$ states
• Production of $P_c$ states in ${\Lambda }_b$ decays
• Exotic Hadrons at LHCb
• Semi-inclusive lepto-production of hidden-charm exotic hadrons
• Identify the hidden charm pentaquark signal from non-resonant background in electron-proton scattering
• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom
• Probing hidden-bottom pentaquarks in fixed-target collisions at the LHC
• Heavy quark spin partners of the $Y(4260)$ in coupled-channel formalism
• Relations between strong decay widths of the $P_c$ pentaquarks in the SU(4) flavor-spin model
• Study on triple-hadron bound states with Gaussian expansion method
• Insights into the nature of the $P_{cs}(4459)$
• Study of the hidden charm pentaquarks ${\Lambda }_{c\bar{c}}$ above $4$ GeV