Decay width of the pentaquark state Θ+(1540) with QCD sum rules

الأصل · EN

In this article, we take the point of view that the pentaquark state Θ+(1540) has negative parity, and choose the diquark-triquark type interpolating current to calculate the strong coupling constant gΘNK in the QCD sum rule approach. Our numerical results indicate the values of the strong coupling constant gΘNK are very small, |gΘNK|=0.175±0.084, and the width ΓΘ<4MeV, which can explain the narrow width Γ≤ 10 MeV naturally.