论文标题
iSgur功能形式主义中的美和魅力梅森的衰减特性
Decay properties of beauty and charm mesons within Isgur-Wise function formalism
论文作者
论文摘要
我们研究了具有现象学潜在模型的某些美丽和魅力介子的衰减特性。首先，我们考虑使用库仑的非同性化哈密顿量，加上指数项，并使用变分方法研究系统的波函数和能量。因此，我们计算质量，衰减常数，重度介子的松弛分支部分以及混合质量参数$δ{m_ {b_q}} $。我们研究了$ {d_s} \toγ\ ell \barν$，$ {d^ - } \toγ\ ell \ bar v $的辐射松性衰减宽度和$ {\ bar b b _ {（s）}} \ e} { ν$，$ {\ bar b _ {（s）}} \ to d _ {（s）}^*\ ell \barν$。使用ISGUR WISE函数，我们计算$ b \ wit {d^{（*）}}π$的分支比和$ d \ of $ d \ tokπ$的两体非质子衰减。我们的结果与其他理论模型和实验结果一致。
We investigate the decay properties of some beauty and charm mesons with a phenomenological potential model. First, we consider the nonrelativistic Hamiltonian of the mesonic system with Coulomb plus exponential terms and study the wave function and the energy of the system using the variational approach. Thereby, we compute the masses, the decay constants, the leptonic branching fractions of heavy-light mesons and the mixing mass parameter $Δ{m_{B_q}}$. We study the radiative leptonic decay widths of ${D_s} \to γ\ell \bar ν$, ${D^ - } \to γ\ell \bar ν$ and the semileptonic decay widths of ${\bar B_{(s)}} \to {D_{(s)}}\ell \bar ν$, ${\bar B_{(s)}} \to D_{(s)}^*\ell \bar ν$. Using Isgur-Wise functions, we calculate the branching ratios of $B \to {D^{(*)}}π$ and two-body nonleptonic decay of $D \to Kπ$. Our results are consistent with other theoretical models and the experimental results.
