PT Journal
AU Richard, JM
   Valcarce, A
   Vijande, J
TI Stable heavy pentaquarks in constituent models
SO Physics Letters B
JI Phys. Lett. B
PY 2017
BP 710
EP 714
VL 774
DI 10.1016/j.physletb.2017.10.036
LA English
AB It is shown that standard constituent quark models produce ((c)over-barcqqq) hidden-charm pentaquarks, where c denotes the charmed quark and q a light quark, which lie below the lowest threshold for spontaneous dissociation and thus are stable in the limit where the internal (c)over-barc 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.
ER