Stable heavy pentaquarks in constituent models
arXiv:1710.08239 · doi:10.1016/j.physletb.2017.10.036
Abstract
It is shown that standard constituent quark models produce hidden-charm pentaquarks, where denotes the charmed quark and a light quark, which lie below the lowest threshold for spontaneous dissociation and thus are stable in the limit where the internal annihilation is neglected. The binding is a cooperative effect of the chromoelectric and chromomagnetic components of the interaction, and it disappears in the static limit with a pure chromoelectric potential. Their wave function contains color sextet and color octet configurations for the subsystems and can hardly be reduced to a molecular state made of two interacting hadrons. These pentaquark states could be searched for in the experiments having discovered or confirmed the hidden-charm meson and baryon resonances.
Five pages, three figures. To be published in Phys. Lett. B
References in corpus (6)
- Hadro-Charmonium
- Exotic meson-meson molecules and compact four--quark states
- Stability of multiquarks in a simple string model
- A numerical algorithm for the explicit calculation of SU(N) and SL(N,C) Clebsch-Gordan coefficients
- The hidden charm pentaquarks are the hidden color-octet baryons?
- Search for doubly-heavy dibaryons in a quark model