We investigate the mass spectrum of the ■ tetraquark states in the relativized quark model.By solving the Schr?dinger-like equation with the relativized potential,the masses of S-and P-wave ■ tetraquarks are obtaine...We investigate the mass spectrum of the ■ tetraquark states in the relativized quark model.By solving the Schr?dinger-like equation with the relativized potential,the masses of S-and P-wave ■ tetraquarks are obtained.The screening effects are also taken into account.It is found that the resonant structureX（2239）observed in thee+e-→K+K-process by the BESIII collaboration can be assigned as a P-wave 1--■ tetraquark state.Furthermore,the radiative transition and the strong decay behavior of this structure are also estimated,which can provide helpful information for future experimental searches.展开更多
In this study,by combining the equal spacing rule with recent observations of Ω_(C)(X)and Ξ_(C)(X)baryons,we predict the spectrum of the low-lying λ-mode 1P-wave excited ∑_(c) states.Furthermore,their strong decay...In this study,by combining the equal spacing rule with recent observations of Ω_(C)(X)and Ξ_(C)(X)baryons,we predict the spectrum of the low-lying λ-mode 1P-wave excited ∑_(c) states.Furthermore,their strong decay properties are predicted using the chiral quark model and the nature of∑_(c)(2800)is investigated by analyzing the invariant mass spectrum.The ∑_(c)(2800)structure observed in the Λ_(c)πmass spectrum was found to potentially arise from two overlapping P-wave resonances,∑_(c)(2813)3/2^(-)and ∑_(c)(2840)5/2^(-).These resonances have similar decay widths of Г〜40 MeV and predominantly decay into the Λ_(c)π channel.The ∑_(c)(2755)1/2^(-)state is likely to be a very narrow state with a width of Г〜15 MeV,with its decays almost saturated by the Λ_(c)π channel.Additionally,evidence of the Lc(2755)1/2^(-)resonance as a very narrow peak may be seen in the Λ_(c)π invariant mass spectrum.The other two P-wave states,∑_(c)(2746)1/2^(-)and ∑_(c)(2796)3/2^(-),are relatively narrow states with similar widths of「〜30 MeV and predominantly decay into ∑_(c)π and ∑^(*)_(c)π,respectively.This study can provide useful references for discovering these low-lying P-wave states in forthcoming experiments.展开更多
基金This project is supported by the National Natural Science Foundation of China(11705056,11475192,U1832173,11975245)supported by the Sino-German CRC 110”Symmetries and the Emergence of Structure in QCD” project by NSFC(11621131001)the Key Research Program of Frontier Sciences,CAS(Y7292610K1)
文摘We investigate the mass spectrum of the ■ tetraquark states in the relativized quark model.By solving the Schr?dinger-like equation with the relativized potential,the masses of S-and P-wave ■ tetraquarks are obtained.The screening effects are also taken into account.It is found that the resonant structureX（2239）observed in thee+e-→K+K-process by the BESIII collaboration can be assigned as a P-wave 1--■ tetraquark state.Furthermore,the radiative transition and the strong decay behavior of this structure are also estimated,which can provide helpful information for future experimental searches.
基金Supported by the National Natural Science Foundation of China(U1832173,11775078)Scientific and Technological Innovation Programs of Higher Education Institutions of Shanxi Province,China(2020L0617)。
文摘In this study,by combining the equal spacing rule with recent observations of Ω_(C)(X)and Ξ_(C)(X)baryons,we predict the spectrum of the low-lying λ-mode 1P-wave excited ∑_(c) states.Furthermore,their strong decay properties are predicted using the chiral quark model and the nature of∑_(c)(2800)is investigated by analyzing the invariant mass spectrum.The ∑_(c)(2800)structure observed in the Λ_(c)πmass spectrum was found to potentially arise from two overlapping P-wave resonances,∑_(c)(2813)3/2^(-)and ∑_(c)(2840)5/2^(-).These resonances have similar decay widths of Г〜40 MeV and predominantly decay into the Λ_(c)π channel.The ∑_(c)(2755)1/2^(-)state is likely to be a very narrow state with a width of Г〜15 MeV,with its decays almost saturated by the Λ_(c)π channel.Additionally,evidence of the Lc(2755)1/2^(-)resonance as a very narrow peak may be seen in the Λ_(c)π invariant mass spectrum.The other two P-wave states,∑_(c)(2746)1/2^(-)and ∑_(c)(2796)3/2^(-),are relatively narrow states with similar widths of「〜30 MeV and predominantly decay into ∑_(c)π and ∑^(*)_(c)π,respectively.This study can provide useful references for discovering these low-lying P-wave states in forthcoming experiments.
