Study On The Strong Decays Of The Singly Heavy Baryons

In recent years,with the discovery of a series of heavy baryon resonances,the study of the strong decays of heavy baryons have made great progresses,which have become a hot issue in the field of hadron physics.Studying the strong decays of singly heavy baryons systematically can help us to further understand the strong interaction,determine the internal structures of the newly observed resonances,further complete the heavy baryon spectrum and enrich the traditional hadron structures.In this paper,we employ 3P0 model to study the strong decay behaviors of Ab and ?b,and explain the newly observed resonances Ab(6146),?b(6152),?b(6072),?b(6316),?b(6330),?b(6340)and ?b(6350)reasonably.The main conclusions are as follows:(1)These two resonances ?b(6146)0 and ?b(6152)0 can be classified into the ?b(1D)doublet reasonably.Combined with the experimental decay modes,the ?b(6146)0 and ?b(6152)0 structure may favor the JP=5/2+and JP=3/2+states,respectively.(2)The ?b(6072)structure can be regarded as the lowest ?-mode excitation in Ab family.For the JP=5/2-Ab and Ac states,the total decay widths are relatively small,and the main decay channels are the ?b(*)? and?c(*)?,respectively.Experiments can find ?-mode ?b and ?c states in these final states,which may help us to distinguish the three-quark model and diquark model.(3)?b(6316)-,?b(6330)-,?b(6340)-and ?b(6350)-resonances can be assigned as the ?-mode ?b(1P)states,which the quantum number JP may be 1/2-?3/2-?3/2-and 5/2-.Meanwhile,the remaining P-wave states with JP=1/2-should have a rather broad decay width,which can hardly be observed by experiments.For the ?b(2S)and Qb(1D)states,they have relatively narrow total widths and mainly decay into the ?bK,?'bK and ?'b*K final states.