Mixing angle of doubly heavy baryons in QCD
Mixing angle of doubly heavy baryons in QCD
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DOI：
10.1016/j.physletb.2012.07.033
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发表时间：
2012-05
影响因子：
4.4
通讯作者：
T. Aliev;K. Azizi;M. Savci
中科院分区：
文献类型：
--
作者：
T. Aliev;K. Azizi;M. Savci
本文用QCD求和规则计算了二重子自旋-1/2、Xi（bc）-Xi '（bc）和Omega（bc）-Omega'（bc）态的混合角。发现混合角很大并且分别具有值phi（Xi bc）= 16度+/-5度和phi（Omega bc）= 18度+/-6度。与非相对论性夸克模型的预测相比，混合角略小，phi（Xi bc）= 25.5度，phi（Omega bc）= 25.9度。
We calculate the mixing angles between the spin-1/2, Xi(bc)-Xi'(bc) and Omega(bc)-Omega'(bc) states of doubly heavy baryons within the QCD sum rules method. It is found that the mixing angles are large and have the values phi(Xi bc) = 16 degrees +/- 5 degrees and phi(Omega bc) = 18 degrees +/- 6 degrees, respectively. The mixing angles are slightly smaller compared to the predictions of the non-relativistic quark model, phi(Xi bc) = 25.5 degrees and phi(Omega bc) = 25.9 degrees.