TY  - JOUR
AU  - Richard, J. M.
AU  - Valcarce, A.
AU  - Vijande, J.
PY  - 2021
DA  - 2021//
TI  - Effect of relativistic kinematics on the stability of multiquarks
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 054020
EP  - 8pp
VL  - 103
IS  - 5
PB  - Amer Physical Soc
AB  - We discuss whether the bound nature of multiquark states in quark models could benefit from relativistic effects on the kinetic energy operator. For mesons and baryons, relativistic corrections to the kinetic energy lead to lower energies, and thus call for a retuning of the parameters of the model. For multiquark states, as well as their respective thresholds, a comparison is made of the results obtained with nonrelativistic and relativistic kinetic energy. It is found that the binding energy is lower in the relativistic case. In particular, QQ (q) over bar(q) over bar tetraquarks with double heavy flavor become stable for a larger ratio of the heavy to light quark masses; the all-heavy tetraquarks QQ (Q) over bar(Q) over bar that are not stable in standard nonrelativistic quark models remain unstable when a relativistic form of kinetic energy is adopted.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2103.02222
UR  - https://doi.org/10.1103/PhysRevD.103.054020
DO  - 10.1103/PhysRevD.103.054020
LA  - English
N1  - WOS:000648531300004
ID  - Richard_etal2021
ER  -