论文标题
新的$λ_b（6072）^0 $状态为$ 2S $底部baryon
New $Λ_b(6072)^0$ state as a $2S$ bottom baryon
论文作者
论文摘要
由于持续发展，最近的实验搜索导致在不同的辐射通道上观察到新颗粒。其中，在这些哈德子中，有重磅式的重桶的激发态，其中包含单底夸克（Quark）的夸克（Quark）含量。最近观察到的$λ_b（6072）^0 $状态是这些重子之一，可能是$ 2S $ radial激发$λ_b$ state。考虑到实验中的这些信息，我们对此状态进行了QCD和规则分析，并计算其质量和当前耦合常数，将其视为$ 2S $ radely兴奋的$λ_b$ resonance。为了完整性，在分析中，我们还计算了基态$λ_b^0 $的质量和电流耦合常数及其第一个轨道激发。我们还考虑每个州的$λ_C^+$对应物，并达到其质量。获得的结果与实验数据以及现有的理论预测一致。
As a result of continuous developments, the recent experimental searches lead to the observations of new particles at different hadronic channels. Among these hadrons are the excited states of the heavy baryons containing single bottom or charmed quark in their valance quark content. The recently observed $Λ_b(6072)^0$ state is one of these baryons and possibly $2S$ radial excitation of the $Λ_b$ state. Considering this information from the experiment, we conduct a QCD sum rule analysis on this state and calculate its mass and current coupling constant considering it as a $2S$ radially excited $Λ_b$ resonance. For completeness, in the analyses, we also compute the mass and current coupling constant for the ground state $Λ_b^0$ and its first orbital excitation. We also consider the $Λ_c^+$ counterpart of each state and attain their mass, as well. The obtained results are consistent with the experimental data as well as existing theoretical predictions.
