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arXiv 0705.2557hep-ph
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无粲奇异$B^+ \to VP$衰变的新系统学

New systematics in charmless strange $B^+ \to VP$ decays

Harry J. Lipkin

摘要:

最新的关于无魅力的奇异矢量赝标量$B^+$衰变的数据现在包括$B^+\to ρ^+ K^o$,证实了一个简单的企鹅模型,在这个模型中,处于初始$\bar s u G$状态的胶子$G$均等地分裂成$u \bar u$、$d \bar d$和$s \bar s$,并且所有的形状因子都相等。搜索可能的额外贡献显示只有少数信号不模糊的实验误差,其影响进行了讨论。分支比$BR(B^+ \to K^{*+}η)$与$BR(B^+\to K^{*+}η')$之比的$0.25 \pm 0.11$的实验值证实奇偶选择规则预测为0.32。大的违规行为出现在一个新的总和这些分支比的总和规则,类似于类似的赝标量和规则,包括$K^+η$和$K^+η'$。在$η-η'$系统中,电弱企鹅贡献或额外混合物(如固有魅力)的指示仍有待澄清。另一种对称性描述与新的预测能力,澄清了简单的企鹅近似,并提出了新的预测,可以通过实验来测试。$\bar s u G$态碎裂成两个介子的过程由强相互作用S矩阵描述,该矩阵由多粒子中间态的非奇异强子共振决定。

英文摘要:

Latest data on charmless strange vector-pseudoscalar $B^+$ decays now including $B^+\to ρ^+ K^o$ confirm a simple penguin model in which the gluon $G$ in an initial $\bar s u G$ state fragments equally into $u \bar u$, $d \bar d$ and $s \bar s$ and all form factors are equal. A search for possible additional contributions shows only a few signals not obscured by experimental errors whose implications are discussed. The experimental value of $0.25 \pm 0.11$ for the ratio of the branching ratios $BR(B^+ \to K^{*+}η)$ to $BR(B^+\to K^{*+}η')$ confirms the parity selection rule prediction 0.32. Large violations arise in a new sum rule for the sum of these branching ratios, analogous to the similar pseudoscalar sum rule including $K^+η$ and $K^+η'$. Indications for either an electroweak penguin contribution or additional admixtures like instrinsic charm in the $η-η'$ system remain to be clarified. An alternative symmetry description with new predictive power clarifies the simple penguin approximation and presents new predictions which can be tested experimentally. The fragmentation of the $\bar s u G$ state into two mesons is described by a strong interaction S-matrix dominated by nonexotic hadron resonances in multiparticle intermediate states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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