Stable heavy pentaquarks in constituent models
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.
Keywords
Cite
@article{arxiv.1710.08239,
title = {Stable heavy pentaquarks in constituent models},
author = {J. -M. Richard and A. Valcarce and J. Vijande},
journal= {arXiv preprint arXiv:1710.08239},
year = {2017}
}
Comments
Five pages, three figures. To be published in Phys. Lett. B