论文标题
$λ_C^{*}（2765）$的三体衰减及其自旋 - parity的确定
Three-body decay of $Λ_c^{*} (2765)$ and determination of its spin-parity
论文作者
论文摘要
我们研究了$λ_c^{*}（2765）\toλ_c^+π^+π^ - $的三体衰减，该衰减是通过在非权利主义框架中使用有效的lagrangians。我们认为在$σ_C（2455）π$和$σ_C^*（2520）π$的顺序衰减中，这是主要贡献的中间状态。在夸克模型中计算有效的拉格朗日人中的耦合常数。我们证明了比率$ r =γ（λ_c^*\toς_c^*（2520）π）/γ（λ_c^*\ toσ_c（2455）π）$，角相关对$λ_C^{*}（2765）$的旋转和平等敏感。因此，在Belle和LHCB等实验设施中对这些可观察到的测量可以提供有用的约束，以确定$λ_C^{*}（2765）$的旋转和奇偶校验。
We study three-body decays of $Λ_c^{*}(2765) \to Λ_c^+π^+π^-$ by using effective Lagrangians in a non-relativistic framework. We consider the sequential decays through $Σ_c(2455)π$ and $Σ_c^*(2520)π$ in intermediate states which are dominant contributions. The coupling constants in the effective Lagrangians are computed in the quark model. We demonstrate that the ratio $R= Γ(Λ_c^*\toΣ_c^*(2520)π)/Γ(Λ_c^*\to Σ_c(2455)π)$ and angular correlations are sensitive to the spin and parity of $Λ_c^{*}(2765)$. Thus, the measurement of these observables in experimental facilities such as Belle and LHCb can provide useful constraints to determine the spin and parity of $Λ_c^{*}(2765)$.
