论文标题
Quark-Dagram方案中涉及解剖BARYON的两体诱人的BARYON衰变
Two-body charmed baryon decays involving decuplet baryon in the quark-diagram scheme
论文作者
论文摘要
在Quark-Diagram方案中，我们研究了$ {\ bf b} _c \ to {\ bf b}^* m $，其中$ {\ bf b} _c $ as $ { BARYON（伪内梅森）。发现只有两个$ w $ -exchange进程可以贡献$ {\ bf b} _c \ to {\ bf b}^* m $。特别是，我们预测$ {\ cal b}（λ_c^+\ toσ^{*0（+）}π^{+（0）}）=（2.8 \ pm 0.4）\ times 10^{ - 3} $，这尊重Isospin对称性。此外，我们考虑了$ su（3）$风味对称破坏，以解释$ {\ cal b}（λ_c^+\ toσ^{*+}η）$的观察。对于涉及$δ^{++}（uuU）$的衰减，我们预测$ {\ cal b}（λ_c^+\toΔ^{++}π^ - ，ξ_c^+\toΔ^+toδ^{++} {++} k^ - ）单独抑制Cabibbo的$λ_C^+，ξ_c^+\ to {\ bf b}^*m $衰减通道中的分数分别是LHCB，Belleii和Besiii实验可访问的。
In the quark-diagram scheme, we study the charmed baryon decays of ${\bf B}_c\to {\bf B}^* M$, where ${\bf B}_c$ is $Λ_c^+$ or $Ξ_c^{+(0)}$, together with ${\bf B}^*$ ($M$) the decuplet baryon (pseudoscalar meson). It is found that only two $W$-exchange processes are allowed to contribute to ${\bf B}_c\to {\bf B}^* M$. Particularly, we predict ${\cal B}(Λ_c^+ \to Σ^{*0(+)} π^{+(0)})=(2.8\pm 0.4)\times 10^{-3}$, which respects the isospin symmetry. Besides, we take into account the $SU(3)$ flavor symmetry breaking, in order to explain the observation of ${\cal B}(Λ_c^+\to Σ^{*+}η)$. For the decays involving $Δ^{++}(uuu)$, we predict ${\cal B}(Λ_c^+\to Δ^{++} π^-,Ξ_c^+ \to Δ^{++} K^-) =(7.0\pm 1.4,13.5\pm 2.7)\times 10^{-4}$ as the largest branching fractions in the singly Cabibbo-suppressed $Λ_c^+,Ξ_c^+\to{\bf B}^*M$ decay channels, respectively, which are accessible to the LHCb, BELLEII and BESIII experiments.
