We use a unitary coupled-channel model to study the DAc-D∑c interactions. In our calculation, SU（3）flavor symmetry is applied to determine the coupling constants. Several resonant and bound states with different sp...We use a unitary coupled-channel model to study the DAc-D∑c interactions. In our calculation, SU（3）flavor symmetry is applied to determine the coupling constants. Several resonant and bound states with different spin and parity are dynamically generated in the mass range of the recently observed pentaquarks. The approach is also extended to the hidden beauty sector to study the BΛb-B∑b interactions. As the b-quark mass is heavier than the c-quark mass, there are more resonances observed for the BΛb-B∑b interactions and they are more tightly bound.展开更多
The constituent quark model is used to compute the ground and excited state masses of QQQ baryons containing either c or b quarks.The quark model parameters previously used to describe the properties of charmonium and...The constituent quark model is used to compute the ground and excited state masses of QQQ baryons containing either c or b quarks.The quark model parameters previously used to describe the properties of charmonium and bottomonium states were used in this analysis.The non-relativistic three-body bound state problem is solved by means of the Gaussian expansion method which provides sufficient accuracy and simplifies the subsequent evaluation of the matrix elements.Several low-lying states with quantum numbers J^P=1/2^±,3/2^±,5/2^±and 7/2^+are reported.We compare the results with those obtained by the other theoretical formalisms.There is a general agreement for the mass of the ground state in each sector of triply heavy baryons.However,the situation is more puzzling for the excited states,and appropriate comments about the most relevant features of our comparison are given.展开更多
Using the one-boson-exchange model,we studied the possible existence of very loosely bound hidden-charm molecular baryons composed of an anti-charmed meson and a charmed baryon.Our numerical results indicate that the ...Using the one-boson-exchange model,we studied the possible existence of very loosely bound hidden-charm molecular baryons composed of an anti-charmed meson and a charmed baryon.Our numerical results indicate that the Σ c ＊ and Σ c states exist,but that the Λ c and Λ c ＊ molecular states do not.展开更多
基金Supported by DFG and NSFC through funds provided to the Sino-German CRC 110“Symmetrythe Emergence of Structure in QCD”(NSFC 11621131001,DFG TR110)+1 种基金NSFC fund(11647601)supported by the CAS President's International Fellowship Initiative(PIFI)(2017VMA0025)
文摘We use a unitary coupled-channel model to study the DAc-D∑c interactions. In our calculation, SU（3）flavor symmetry is applied to determine the coupling constants. Several resonant and bound states with different spin and parity are dynamically generated in the mass range of the recently observed pentaquarks. The approach is also extended to the hidden beauty sector to study the BΛb-B∑b interactions. As the b-quark mass is heavier than the c-quark mass, there are more resonances observed for the BΛb-B∑b interactions and they are more tightly bound.
基金Supported by China Postdoctoral Science Foundation(2019M650617)National Natural Science Foundation of China(11535005,11775118)+2 种基金Spanish Ministerio de Economía,Industria y Competitividad under contracts no.FPA2017-86380-P and FPA2016-77177-C2-2-P.P.G.O.the financial support from Spanish MINECO’s Juan de la Cierva-Incorporación programmeGrant Agreement No.IJCI-2016-28525
文摘The constituent quark model is used to compute the ground and excited state masses of QQQ baryons containing either c or b quarks.The quark model parameters previously used to describe the properties of charmonium and bottomonium states were used in this analysis.The non-relativistic three-body bound state problem is solved by means of the Gaussian expansion method which provides sufficient accuracy and simplifies the subsequent evaluation of the matrix elements.Several low-lying states with quantum numbers J^P=1/2^±,3/2^±,5/2^±and 7/2^+are reported.We compare the results with those obtained by the other theoretical formalisms.There is a general agreement for the mass of the ground state in each sector of triply heavy baryons.However,the situation is more puzzling for the excited states,and appropriate comments about the most relevant features of our comparison are given.
基金Supported by National Natural Science Foundation of China (11175073,11075004,11021092,11035006,11047606,10805048)Ministry of Science and Technology of China (2009CB825200)+1 种基金Ministry of Education of China (FANEDD 200924,DPFIHE20090211120029,NCET NCET-10-0442)Fundamental Research Funds for the Central Universities(lzujbky-2010-69)
文摘Using the one-boson-exchange model,we studied the possible existence of very loosely bound hidden-charm molecular baryons composed of an anti-charmed meson and a charmed baryon.Our numerical results indicate that the Σ c ＊ and Σ c states exist,but that the Λ c and Λ c ＊ molecular states do not.
