PT Journal
AU Richard, JM
   Valcarce, A
   Vijande, J
TI String dynamics and metastability of all-heavy tetraquarks
SO Physical Review D
JI Phys. Rev. D
PY 2017
BP 054019
EP 7pp
VL 95
IS 5
DI 10.1103/PhysRevD.95.054019
LA English
AB Multiquark states have been advocated to explain recent experimental data in the heavy-light sector, and there are already speculations about multiquarks containing only heavy quarks and antiquarks. With a rigorous treatment of the four-body problem in current quark models, full-charm (cc (c) over bar(c) over bar) and full-beauty(bb (b) over bar(b) over bar) tetraquarks are found to be unbound. Thus their stability should rely on more subtle effects that are not included in the simple picture of constituent quarks. The case of (bc (b) over bar(c) over bar) might be more favorable if the naive color-additive model of confinement is replaced by a string-inspired interaction.
ER