In this paper, production of charmonium state 𝒬 in exclusive W →𝒬Ds(∗) decays is analyzed in the framework of both leading order Non-relativistic Quantum Chromodynamics (NRQCD) and light-cone (LC) expansion models. Analytical and numerical predictions for the branching fractions of these decays in both the approaches are given. The typical value of the branching fractions is ∼10−11 and it turns out that the LC results are significantly larger than NRQCD ones (approximately two or four times increase depending on the quantum numbers of the final particles), so the effect of internal quark motion should be taken into account. Some rough estimates of color-octet contributions are presented and it is shown that these contributions could be comparable with color-singlet results.

中文翻译：

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W → (cc̄)Ds(∗) 中的 Charmonia 产生衰减

在本文中，铷态的生产𝒬在独家W →𝒬Ds(*)在前导阶非相对论量子色动力学 (NRQCD) 和光锥 (LC) 扩展模型的框架内分析衰变。给出了两种方法中这些衰减的分支分数的分析和数值预测。支化分数的典型值为 ～10-11事实证明，LC 结果明显大于 NRQCD 的结果（根据最终粒子的量子数，大约增加了两到四倍），因此应考虑内部夸克运动的影响。提出了一些对颜色八位组贡献的粗略估计，并表明这些贡献可以与颜色单峰结果相媲美。