Charm-strange baryon strong decays in a chiral quark model
Charm-strange baryon strong decays in a chiral quark model
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手征夸克模型中魅力奇异重子的强衰变
DOI：
10.1103/physrevd.86.034024
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发表时间：
2012-05
期刊：
影响因子：
--
通讯作者：
Zhong, Xian-Hui
中科院分区：
文献类型：
--
作者：
Liu, Lei-Hua;Xiao, Li-Ye;Zhong, Xian-Hui
在手征夸克模型中，研究了直到N=2壳层的魅力奇异重子的强衰变。确定的魅力奇重子的理论预测与实验数据符合得很好。该模型还被推广到分析其他新观测到的奇异重子--奇重子$\xi_c(2930)$、$\xi_c(2980)$、$\xi_c(3055)$、$\xi_c(3080)$和$\xi_c(3123)$的强衰变。我们的预测如下。(I)$Xi_c(2930)$可能是$Xi_c‘$的第一个$P波激发，且$J^P=1/2^-$，有利于$|Xi_c’2P_\lambda 1/2^->；$或$|\xi_c‘-&g；$状态。(Ii)$xi_c(2 980)$可能分别对应于两个重叠的$P$波态$|\xi_c‘-rho1/2^-和$|\xi_c’\rho3/2^->；$。在$\Lambda_c^+\bar{K}\pi$终态中观察到的$xi_c(2980)$最有可能是$|\xi_c‘\rho 1/2^->$状态，而在$\xi_c^*(2645)\pi$通道中观察到的具有质量$m\simeq 2.97$GeV的较窄共振倾向于被分配给$|\xi_c’\^2P_\rho 3/2^->$状态。(3)$Xi_c(3080)$倾向于归类为$|\xi_c\S 1/2^+>；$状态，即$Xi_c$的第一径向激发(2S)。(4)$xi_c(3055)$最有可能是$xi_c$的第一个$D$波激发，其中$J^P=3/2^+$，有利于$|xi_c 2D_{\lambda\lambda}3/2^+&$状态。(V)$xi_c(3123)$可能分配给$|\xi_c‘{\lambda\lambda}3/2^+>；$、$|\xi_c’5/2^+>；$或$|\xi_c2D_{\rho\rho}5/2^+&>$状态。作为副产品，我们计算了底部重子的强衰变，这也与最近的观测结果相一致。
The strong decays of charm-strange baryons up to N=2 shell are studied in a chiral quark model. The theoretical predictions for the well determined charm-strange baryons, $\Xi_c^*(2645)$, $\Xi_c(2790)$ and $\Xi_c(2815)$, are in good agreement with the experimental data. This model is also extended to analyze the strong decays of the other newly observed charm-strange baryons $\Xi_c(2930)$, $\Xi_c(2980)$, $\Xi_c(3055)$, $\Xi_c(3080)$ and $\Xi_c(3123)$. Our predictions are given as follows. (i) $\Xi_c(2930)$ might be the first $P$-wave excitation of $\Xi_c'$ with $J^P=1/2^-$, favors the $|\Xi_c'\ ^2P_\lambda 1/2^->$ or $|\Xi_c'\ ^4P_\lambda 1/2^->$ state. (ii) $\Xi_c(2980)$ might correspond to two overlapping $P$-wave states $|\Xi_c'\ ^2P_\rho 1/2^->$ and $|\Xi_c'\ ^2P_\rho 3/2^->$, respectively. The $\Xi_c(2980)$ observed in the $\Lambda_c^+\bar{K}\pi$ final state is most likely to be the $|\Xi_c'\ ^2P_\rho 1/2^->$ state, while the narrower resonance with a mass $m\simeq 2.97$ GeV observed in the $\Xi_c^*(2645)\pi$ channel favors to be assigned to the $|\Xi_c'\ ^2P_\rho 3/2^->$ state. (iii) $\Xi_c(3080)$ favors to be classified as the $|\Xi_c\ S_{\rho\rho} 1/2^+>$ state, i.e., the first radial excitation (2S) of $\Xi_c$. (iv) $\Xi_c(3055)$ is most likely to be the first $D$-wave excitation of $\Xi_c$ with $J^P=3/2^+$, favors the $|\Xi_c\ ^2D_{\lambda\lambda} 3/2^+>$ state. (v) $\Xi_c(3123)$ might be assigned to the $|\Xi_c'\ ^4D_{\lambda\lambda} 3/2^+>$, $|\Xi_c'\ ^4D_{\lambda\lambda} 5/2^+>$, or $|\Xi_c\ ^2D_{\rho\rho} 5/2^+>$ state. As a by-product, we calculate the strong decays of the bottom baryons $\Sigma_b^{\pm}$, $\Sigma_b^{*\pm}$ and $\Xi_b^*$, which are in good agreement with the recent observations as well.
DOI：
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发表时间：
2004
期刊：
--
影响因子：
--
作者：
D. Boutigny;F. Couderc;J. Gaillard;A. Hicheur;Y. Karyotakis;J. Lees;V. Tisserand;A. Zghiche-A.-Zg
通讯作者：
D. Boutigny;F. Couderc;J. Gaillard;A. Hicheur;Y. Karyotakis;J. Lees;V. Tisserand;A. Zghiche-A.-Zg
DOI：
--
发表时间：
2001
期刊：
--
影响因子：
--
作者：
N. Satoyama;K. Abe;I. Adachi;H. Aihara;D. Anipko;A. Bakich;E. Barberio;I. Bedny;K. Belous-K.-Belou
通讯作者：
N. Satoyama;K. Abe;I. Adachi;H. Aihara;D. Anipko;A. Bakich;E. Barberio;I. Bedny;K. Belous-K.-Belou