论文标题
迷住的baryon弱衰变与媒介介子
Charmed Baryon Weak Decays with Vector Mesons
论文作者
论文摘要
我们对$ {\ bf b} _c \ \ to {\ bf b} _n v $衰变进行了系统的研究，其中$ {\ bf b} _c $和$ {\ bf b} _n $对应于反vector vector vector vector vector vector vector vector for Vector for Vector。我们通过分解方法计算出有效哈密顿量的衰减的颜色对称贡献，并根据实验测量值提取反对称的贡献，以及$ su（3）_f $风味对称性。我们发现，$ {\ bf b} _c \ to {\ bf b} _n v $的大多数现有实验数据与我们的拟合结果一致。我们介绍了允许的所有分支比例，允许，单独抑制cabbibo和双重cabbibo抑制了$ {\ bf b} _c \ to {\ bf bf b} _n v $。还评估了$ {\ bf b} _c \ to {\ bf b} _n v $中女儿baryons and Mesons的衰减参数。特别是，我们指出的是，cabbibo允许的衰减为$λ_c^+ \toλ^0ρ^+ $和$ξ_c^0 \ 0 \ toξ^ - ρ^ - ρ^+ $，以及$λ_c^+ \ to的单一cabbibo抑制cabbibo，to cabbibo use $ξ_c^0 \ toξ^ - k^{*+} $具有较大的分支比率和具有小不确定性的衰减参数，可以通过魅力设施的实验搜索来测试。
We give a systematic study of ${\bf B}_c\to {\bf B}_n V$ decays, where ${\bf B}_c$ and $ {\bf B}_n$ correspond to the anti-triplet charmed and octet baryons, respectively, while $V$ stand for the vector mesons. We calculate the color-symmetric contributions to the decays from the effective Hamiltonian with the factorization approach and extract the anti-symmetric ones based on the experimental measurements and $SU(3)_F$ flavor symmetry. We find that most of the existing experimental data for ${\bf B}_c\to {\bf B}_n V$ are consistent with our fitting results. We present all the branching ratios of the Cabbibo allowed, singly Cabbibo suppressed and doubly Cabbibo suppressed decays of ${\bf B}_c\to {\bf B}_n V$. The decay parameters for the daughter baryons and mesons in ${\bf B}_c\to {\bf B}_n V$ are also evaluated. In particular, we point out that the Cabbibo allowed decays of $Λ_c^+ \to Λ^0 ρ^+$ and $ Ξ_c^0 \to Ξ^- ρ^+$ as well as the singly Cabbibo suppressed ones of $Λ_c^+ \to Λ^0 K^{*+}$, $Ξ_c^+ \to Σ^+ ϕ$ and $Ξ_c^0\to Ξ^- K^{*+}$ have large branching ratios and decay parameters with small uncertainties, which can be tested by the experimental searches at the charm facilities.
