X(2900) in a chiral quark model

Recently,the LHCb Collaboration reported their observation of the first two fully open-flavor tetraquark states named Xo(2900) and X1(2900) with unknown parity.Inspired by the report,we consider all the possible fourquark candidates for X(2900),which include the molecular structure,diquark structure,and their coupling in a chiral quark model via the Gaussian expansion method.To identify the genuine resonances,the real-scaling method(stabilization method) was employed.Our results show that five possible resonances,R0(2914) with Γ=42 MeV,R1(2906) with Γ=29 MeV,R1(2912) with Γ=10 McV,Rj(2920) with Γ=9 MeV,and RJ(2842) with Γ=24 MeV,originate in the cs■ system.Compared with experimental data,R0(2914) with Γ=42 MeV may be an optimal X0(2900) candidate.However,none of the resonances have a similar width for X1(2900).Hence,further study is required.