Recently,the LHCb Collaboration reported their observation of the first two fully open-flavor tetraquark states named X_(0)(2900)and X_(1)(2900)with unknown parity.Inspired by the report,we consider all the possible f...Recently,the LHCb Collaboration reported their observation of the first two fully open-flavor tetraquark states named X_(0)(2900)and X_(1)(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,R_(0)(2914)withΓ=42 MeV,R_(1)(2906)withΓ=29 MeV,R_(1)(2912)withΓ=10 McV,R_(J)(2920)withΓ=9 MeV,and R_(J)(2842)withΓ=24 MeV,originate in the csqq system.Compared with experimental data,R_(0)(2914)withΓ=42 MeV may be an optimal X_(0)(2900)candidate.However,none of the resonances have a similar width for X_(1)(2900).Hence,further study is required.展开更多
基金Supported in part by the National Natural Science Foundation of China(11775118,11535005)。
文摘Recently,the LHCb Collaboration reported their observation of the first two fully open-flavor tetraquark states named X_(0)(2900)and X_(1)(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,R_(0)(2914)withΓ=42 MeV,R_(1)(2906)withΓ=29 MeV,R_(1)(2912)withΓ=10 McV,R_(J)(2920)withΓ=9 MeV,and R_(J)(2842)withΓ=24 MeV,originate in the csqq system.Compared with experimental data,R_(0)(2914)withΓ=42 MeV may be an optimal X_(0)(2900)candidate.However,none of the resonances have a similar width for X_(1)(2900).Hence,further study is required.
