Axial Vector Tetraquark with Two s-quarks

Details Axial Vector Tetraquark with Two s-quarks Axial Vector Tetraquark with Two s-quarks

2007-04-14

arxiv.org/abs/0704.1856v1

Prog.Theor.Phys.Suppl.168:194-197,2007

Physics

Nuclear Physics

Nuclear Theory

prepared for Yukawa International Seminars "New Frontiers in QCD" (YKIS2006), Nov. 20-Dec. 8, 2006, Kyoto, Japan, to appear in

Scientific paper

10.1143/PTPS.168.194

Possibility of an axial vector isoscalar tetraquark $ud\bar{s}\bar{s}$ is discussed. If a $f_1$ meson in the mass region $1.4-1.5$ GeV consists of four quarks $ns\bar{n}\bar{s}$, the mass of the isoscalar $ud\bar{s}\bar{s}$($\vartheta^+$-meson) state with $J^P=1^+$ is expected to be lower than that of the $f_1$ meson. Within a flux-tube quark model, a possible resonant state of $ud\bar{s}\bar{s}(J^{P}=1^{+})$ is suggested to appear at $\sim$ 1.4 GeV with the width ${\cal{O}}(20\sim 50)$ MeV. We propose that the $\vartheta^+$-meson is the good candidate for the tetraquark search, which would be observed in the $K^+K^+\pi^-$ decay channel.

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