论文标题
$ b_d^0 \ to j/ψk^0_s $和$ b_s^0 \ to j/ψϕ $中的企鹅效应
Penguin Effects in $B_d^0\to J/ψK^0_S$ and $B_s^0\to J/ψϕ$
论文作者
论文摘要
在衰减中，$ b_d^0 \到j/ψk^0_s $和$ b_s^0 \ to j/ψϕ $控制损失的双重抑制企鹅拓扑的贡献是必不可少的$ ϕ_s $。可以使用基于$ su（3）$ QCD风味对称性的策略来确定企鹅贡献。使用最新的实验数据，我们将衰减$ b_d^0 \的组合分析更新为j/ψk^0_s $，$ b_s^0 \ 0 \及其控制通道$ b_s^0 \ to j/ar s^0_s $，$ b_d^0_s $，$ b_d^0 \ to J/ψ$和$ b_ $和$ b_/c_/c_/c_/c_/c_/c_/c_/c_//n $ b_d^0 $ to^0 $ to^0./ψ^0×0×0×0×0×0×0×0°ρ这使我们能够同时确定企鹅参数和两个混合阶段。我们讨论如何使用这些衰减的分支分数来探测非物质上的$ su（3）$ - 破坏效应的大小，这构成了与我们的$ su（3）$ - 基于$ SU（3）$的策略相关的主要理论不确定性，并为分解方法提供了新的见解。
Controlling the contributions from doubly Cabibbo-suppressed penguin topologies in the decays $B_d^0\to J/ψK^0_S$ and $B_s^0\to J/ψϕ$ is mandatory to reach the highest possible precision in the measurement of the $B^0_q$--$\bar B^0_q$ ($q=d,s$) mixing phases $ϕ_d$ and $ϕ_s$. The penguin contributions can be determined using a strategy based on the $SU(3)$ flavour symmetry of QCD. Using the latest experimental data, we update our combined analysis of the decays $B_d^0\to J/ψK^0_S$, $B_s^0\to J/ψϕ$ and their control channels $B_s^0\to J/ψK^0_S$, $B_d^0\to J/ψπ^0$ and $B_d^0\to J/ψρ^0$. This allows us to simultaneously determine the penguin parameters and both mixing phases. We discuss how the branching fractions of these decays can be used to probe the size of non-factorisable $SU(3)$-breaking effects, which form the main theoretical uncertainty associated with our $SU(3)$-based strategy, and provide new insights into the factorisation approach.
