Axial-vector tetraquark with S=+2

作者：Kanada En'yo Y^*; Morimatsu O; Nishikawa T

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2005, 71(9): 094005.

DOI：10.1103/PhysRevD.71.094005

The possibility of an axial-vector isoscalar tetraquark with ud (s) over bar(s) over bar is discussed. If the pentaquark Theta(+)(1540) has the (qq)((3) over bar)(qq)((3) over bar)(q) over bar configuration, the isoscalar ud (s) over bar(s) over bar (theta(+)- meson) state with J(P) = 1(+) is expected to exist in the mass region lower than, or close to, the mass of Theta(+) (1540). Within a flux-tube quark model, a possible resonant state of ud (s) over bar(s) over bar (J(P) = 1(+)) is suggested to appear around 1.4 GeV with the width O(20 similar to 80) MeV. We propose that the theta(+)-meson is a good candidate for the tetraquark search, which would be observed in the K+K+pi(-) decay channel.

• 出版日期2005-5