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Ξc−<mml:mi mathvariant=
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DOI：
10.1016/j.physletb.2023.137941
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发表时间：
2023-05
影响因子：
4.4
通讯作者：
Han Liu;Liuming Liu;Pengzhong Sun;Wei-kang Sun;Jin Tan;Wei Wang;Yi-Bo Yang;Qi-An Zhang
中科院分区：
文献类型：
--
作者：
Han Liu;Liuming Liu;Pengzhong Sun;Wei-kang Sun;Jin Tan;Wei Wang;Yi-Bo Yang;Qi-An Zhang
In heavy quark limit, the lowest-lying charmed baryons with two light quarks can form an SU (3) triplet and sextet. The Ξ c in the SU (3) triplet and Ξ c′ in the sextet have the same J P C quantum number and can mix due to the finite charm quark mass and the fact the strange quark is heavier than the up/down quark. We explore the Ξ c–Ξ c′ mixing by calculating the two-point correlation functions of the Ξ c and Ξ c′ baryons from lattice QCD. Based on the lattice data, we adopt two independent methods to determine the mixing angle between Ξ c and Ξ c′. After making the chiral and continuum extrapolation, it is found that the mixing angle θ is 1.2∘±0.1∘, which seems insufficient to account for the large SU (3) symmetry breaking effects found in weak decays of charmed baryons.
