The Productions and Strong Decays of $D_q(2S)$ and $B_q(2S)$

The Productions and Strong Decays of $D_q(2S)$ and $B_q(2S)$
复制标题

$D_q(2S)$ 和 $B_q(2S)$ 的产生式和强衰变

DOI:
10.1088/0954-3899/39/8/085006
复制
发表时间:
2012-07
期刊:
Journal of Physics G: Nuclear and Particle Physics
影响因子:
--
通讯作者:
Tianhong Wang
Tianhong Wang
中科院分区:
其他
文献类型:
--
作者:
Zhi-hui Wang;Guo-Li Wang;Jin-Mei Zhang;Tianhong Wang

文献摘要

参考文献

被引文献

相似文献

我们用改进的Bethe-Salpeter方法研究了独占半轻子$B_{q'}$ ($q'=u, d s, c$)衰变中第一径向激发态$D_q(2S)$ ($q=u, d, s$)和$B_q(2S)$的产生。这些2S态可以通过它们对地介子的强衰减来检测,其中强衰减可以通过低能量近似和脉冲近似来计算。有些渠道有订单比例$10^{-4}$: $Br(B^+\to\bar D^0(2S)\ell^+{\nu_\ell})\times Br(\bar D^0(2S)\to \bar D^{*}\pi)\approx(4.9\pm4.0)\times10^{-4}$, $Br(B^0\to D^-(2S)\ell^+{\nu_\ell})\times Br(D^-(2S)\to \bar D^{*}\pi)\approx(4.4\pm3.4)\times10^{-4}$。这些通道可以通过当前的b工厂来测量。对于$D_s(2S)$,我们也得到一个相对较大的比率:$Br(B_s^0\to D_s^-(2S)\ell^+{\nu_\ell})\times Br(D_s^-(2S)\to \bar D^{*}\bar K)\approx (9.9\pm14.9)\times10^{-4}$。虽然${D}^0(2S)$的理论预测与$D(2550)^0$的实验结果在全衰减宽度上存在差异,但新探测到的状态$D(2550)^0$很可能是${D}^0(2S)$状态。
We study the productions of first radial excited states $D_q(2S)$ ($q=u, d, s$) and $B_q(2S)$ in exclusive semi-leptonic $B_{q'}$ ($q'=u, d s, c$) decays by the improved Bethe-Salpeter method. These 2S states can be detected through their strong decays to ground mesons, where the strong decays are calculated by the low energy approximation as well as the impulse approximation. Some channels have ratios of order $10^{-4}$: $Br(B^+\to\bar D^0(2S)\ell^+{\nu_\ell})\times Br(\bar D^0(2S)\to \bar D^{*}\pi)\approx(4.9\pm4.0)\times10^{-4}$, $Br(B^0\to D^-(2S)\ell^+{\nu_\ell})\times Br(D^-(2S)\to \bar D^{*}\pi)\approx(4.4\pm3.4)\times10^{-4}$. These channels could be measured by the current B-factories. For $D_s(2S)$, we also obtain a relative large ratio: $Br(B_s^0\to D_s^-(2S)\ell^+{\nu_\ell})\times Br(D_s^-(2S)\to \bar D^{*}\bar K)\approx (9.9\pm14.9)\times10^{-4}$. Although there are discrepancies of the full decay width between the theoretical predictions of ${D}^0(2S)$ and experimental results of $D(2550)^0$, the new detected state $D(2550)^0$ is very likely the ${D}^0(2S)$ state.
DOI: 10.1103/physrevd.51.6177
发表时间: 1994-10
期刊: Physical review. D, Particles and fields
影响因子: --
作者:
V. Belyaev;V. Braun;A. Khodjamirian;R. Ruckl
通讯作者: V. Belyaev;V. Braun;A. Khodjamirian;R. Ruckl
DOI: 10.1103/physrevd.77.054003
发表时间: 2007-07
期刊: Physical Review D
影响因子: 5
作者:
Yu-Ming Wang;C. Lu
通讯作者: Yu-Ming Wang;C. Lu
DOI: 10.1103/physrevc.56.3369
发表时间: 1997-08
期刊: Physical Review C
影响因子: 3.1
作者:
P. Maris;C. Roberts
通讯作者: P. Maris;C. Roberts
DOI: 10.1103/physrevd.82.034019
发表时间: 2010-07
期刊: Physical Review D
影响因子: 5
作者:
D. Ebert;R. Faustov;R. Faustov;V. Galkin;V. Galkin
通讯作者: D. Ebert;R. Faustov;R. Faustov;V. Galkin;V. Galkin
DOI: 10.1103/physrevd.65.032003
发表时间: 2001-08
期刊: Physical Review D
影响因子: 5
作者:
A. Anastassov;E. al.
通讯作者: A. Anastassov;E. al.