TY  - JOUR
AU  - Valcarce, A.
AU  - Vijande, J.
AU  - Richard, J. M.
AU  - Garcilazo, H.
PY  - 2018
DA  - 2018//
TI  - Stability of Heavy Tetraquarks
T2  - Few-Body Syst.
JO  - Few-Body Systems
SP  - 9 - 7pp
VL  - 59
IS  - 2
PB  - Springer Wien
AB  - We discuss the stability of tetraquark systems with two different masses. After some reminders about the stability of very asymmetric QQ (q) over bar(q) over bar tetraquarks, we demonstrate that in the all-heavy limit q -> Q, the system becomes unstable for standard color-additive models. We also analyze the consequences of symmetry breaking for Qq (Q) over bar(q) over bar configurations: we find a kind of metastability between the lowest threshold Q (Q) over bar + q (q) over bar and the highest one, Q (q) over bar + (Q) over barq, and we calculate the width of the resonance. Our results are consistent with the experimental observation of narrow hadrons lying well above their lowest decay threshold.
SN  - 0177-7963
UR  - https://doi.org/10.1007/s00601-018-1331-9
DO  - 10.1007/s00601-018-1331-9
LA  - English
N1  - WOS:000427011200005
ID  - Valcarce_etal2018
ER  -