论文标题
$ z $玻色子衰变的双重融合的巴里昂生产
Doubly-charmed baryon production in $Z$ boson decay
论文作者
论文摘要
在本文中，我们根据非依赖性QCD分解，对$ z $玻色子衰变的双重融合的巴里昂产量进行了详细研究。随着di-quark的包含，$（cc）[^3s_1] _ {\ bar {\ textbf {3}}}} $和$（cc）[^1s_0] _ {\ textbf {6}} $，$ \ \ \ ratscal的分支比例预计为$ 10^{ - 5} $订单，表明其实验性可测量性。通过与$ Z $ decay中的$λ^{+} _ {c} $ tartial相比，我们预测$ \ mathcal {r} _ {ξ_{ξ_{cc}^{+} {+}}}}}（= \ frac {γ（z \ to z \ to z \ t t t t to en en encc^{+} _ {+} _ {cc} _ {cc} _ {cc {cc { \ Mathcal {b}（ξ^{+} _ {cc} \toλ_c^{+} k^{ - }π^{+}}}}} {γ（z \ t toom_c^{+} {+} {+}}） $ \ Mathcal {r} _ {ξ_{cc}^{++}}}}（= \ frac {γ（z \ toξ^{++} _ {++} _ {cc}） Λ_c^{+}K^{-}π^{+}π^{+})}{Γ(Z \to Λ_c^{+})})=(1.70^{+0.20}_{-0.14}) \times 10^{-4}$, which are at clear variance with the SELEX measurements but comparable with the values given by the LHCB和Belle合作。
In this paper, we carry out a detailed study of doubly-charmed baryon production in $Z$ boson decay, on the basis of the nonrelativistic QCD factorization. With the inclusion of the di-quark states $(cc)[^3S_1]_{\bar{\textbf{3}}}$ and $(cc)[^1S_0]_{\textbf{6}}$, the branching ratio of $\mathcal{B}_{Z \to Ξ_{cc}+X}$ is predicted to be of the $10^{-5}$ order, indicating its experimental measurability. By comparing to the $Λ^{+}_{c}$ yield in $Z$ decay, we predict $\mathcal{R}_{Ξ_{cc}^{+}}(=\frac{Γ(Z \to Ξ^{+}_{cc}) \times \mathcal{B}(Ξ^{+}_{cc} \to Λ_c^{+}K^{-}π^{+})}{Γ(Z \to Λ_c^{+})})=(0.85^{+0.10}_{-0.07}) \times 10^{-4}$ and $\mathcal{R}_{Ξ_{cc}^{++}}(=\frac{Γ(Z \to Ξ^{++}_{cc}) \times \mathcal{B}(Ξ^{++}_{cc} \to Λ_c^{+}K^{-}π^{+}π^{+})}{Γ(Z \to Λ_c^{+})})=(1.70^{+0.20}_{-0.14}) \times 10^{-4}$, which are at clear variance with the SELEX measurements but comparable with the values given by the LHCb and Belle collaborations.
