【摘 要】
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In this study,we choose the scalar and axialvector diquark operators in the color antitriplet as the funda-mental building blocks to construct four-quark currents and investigate the diquark-antidiquark type axialvector tet-raquark states c(c)u(s) in the
【机 构】
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Department of Physics,North China Electric Power University,Baoding 071003,China
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In this study,we choose the scalar and axialvector diquark operators in the color antitriplet as the funda-mental building blocks to construct four-quark currents and investigate the diquark-antidiquark type axialvector tet-raquark states c(c)u(s) in the framework of the QCD sum rules.The predicted tetraquark mass MZ =3.99 ± 0.09 GeV is in excellent agreement with the experimental value 3985.2+2.1-2.0 ± 1.7 MeV from the BESIII collaboration,which sup-ports identifying Zcs(3985) as the cousin of Zc(3900) with quantum numbers JPC =1+-.We take into account the light flavor S U(3) mass-breaking effect to estimate the mass spectrum of the diquark-antidiquark type hidden-charm tetraquark states with strangeness according to previous studies.
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