J(P)=1(+) ud(s)over-bar(s)over-bar tetraquark

Using the color-magnetic interaction Hamiltonian with SU(3) flavor symmetry breaking, we perform a schematic study of the masses of the J(P) = 1(+) tetraquarks in the antidecuplet representation. After diagonalizing the mass matrix, we find the ud (s) over bar (s) over bar tetraquark could lie as low as about 1350 MeV. It decays into (K+KK)-K-0 pi(0), K(+)K(+)pi(-), K(0)K(0)pi(+) via P-wave. The dual suppression from the not-so-big three-body phase space and P- wave decay barrier may render this exotic state rather narrow. Future experimental exclusion of this state will cast doubt on the validity of applying the simple color-magnetic Hamiltonian to the multiquark system.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)13ARTICLE1null7