6533b870fe1ef96bd12cf26f
RESEARCH PRODUCT
LHCb pentaquarks in constituent quark models
Francisco FernándezPablo G. OrtegaDavid R. Entemsubject
Particle physicsNuclear and High Energy PhysicsPotential modelsMesonStrong interactionHadronBinding energyNuclear TheoryConstituent quarkFOS: Physical sciences01 natural sciencesNuclear physicsHigh Energy Physics - Phenomenology (hep-ph)Condensed Matter::Superconductivity0103 physical sciencesBound state010306 general physicsNuclear ExperimentPhysics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyPentaquarklcsh:QC1-999Models of strong interactionsCharmed baryonsHigh Energy Physics - PhenomenologyHigh Energy Physics::ExperimentHeavy quarkonialcsh:Physicsdescription
The recently discovered $P_c(4380)^+$ and $P_c(4450)^+$ states at LHCb have masses close to the $\bar D\Sigma_c^*$ and $\bar D^*\Sigma_c$ thresholds, respectively, which suggest that they may have significant meson-baryon molecular components. We analyze these states in the framework of a constituent quark model which has been applied to a wide range of hadronic observables, being the model parameters, therefore, completely constrained. The $P_c(4380)^+$ and $P_c(4450)^+$ are studied as molecular states composed by charmed baryons and open charm mesons. Several bound states with the proper binding energy are found in the $\bar D\Sigma_c^*$ and $\bar D^*\Sigma_c$ channels. We discuss the possible assignments of these states from their decay widths. Moreover, two more states are predicted, associated with the $\bar D\Sigma_c$ and $\bar D^* \Sigma_c^*$ thresholds.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-06-20 | Physics Letters B |