论文标题
$ξ_c（2970）$的理论解释
Theoretical interpretation of $Ξ_c(2970)$
论文作者
论文摘要
开放的魅力衰减宽度和诱人的奇怪baryon $ξ_c（2970）$的分支分数的一定比率是在$^3p_0 $型号中计算的。结果与最新的实验数据兼容。衰减分支分数的理论比率$ r = \ MATHCAL {B} [ξ_{c}（2970）^+ \rightArrowξ_C（2645）^{0}π^{+} {+} {+} {+} {+}] / \ Mathcal {b} ξ_c^{\ prime0}π^{+}] \大约1.0 $。分析了不同作业的旋转范围$ j^p = 1/2^+$和$ 3/2^+$。从我们的计算结果中，$ξ_{c}（2970）$可以解释为$ 2S $ - 波状态，带有$ j^p（s_l）= 1/2^+（0）$。还讨论了2s-Wave $n_ρ$ - 和$n_λ$ - 激素状态以及$ s_l = 0 $和$ s_l = 1 $的状态以及总旋转$ 1/2 $和$ 3/2 $（$ s_l = 1 $）之间的区别。
The open charm strong decay widths and certain ratio of branching fractions of a charmed strange baryon $Ξ_c(2970)$ are calculated in a $^3P_0$ model. The results are compatible with the latest experimental data. The theoretical ratio of decay branching fractions $R = \mathcal{B} [ Ξ_{c}(2970)^+ \rightarrow Ξ_c(2645)^{0}π^{+} ] / \mathcal{B} [ Ξ_{c}(2970)^+ \rightarrow Ξ_c^{\prime0}π^{+}] \approx 1.0$. The spin-parity $J^P = 1/2^+$ and $3/2^+$ for different assignments are analyzed. From the results of our calculation, $Ξ_{c}(2970)$ can be interpreted as a $2S$-wave state with $J^P(s_l) = 1/2^+(0)$. The distinguishing between the 2S-wave $n_ρ$- and $n_λ$-excitation states and between states with $s_l = 0$ and $s_l = 1$ and between states with total spin $1/2$ and $3/2$($s_l = 1$) are also discussed.
