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arXiv 0903.3701hep-ph
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协变光阵面方法中涉及张量介子的非轻子无粲两体B衰变

Nonleptonic charmless two-body B decays involving tensor mesons in the covariant light-front approach

J. H. Munoz, N. Quintero

摘要:

我们重新分析了一些$\mathcal{B}(B \to P(V)T)$(其中$P$、$V$和$T$分别表示赝标、矢量和张量介子)的非轻子无粲二体B衰变。我们计算了无魅力的$B \to PT$和$B\to VT$模式的分支比,使用$B \to T$的形状因子在协变光阵面(CLF)的方法和全有效哈密顿。我们已经考虑了$B \to η^{(\prime)}T$通道的$η-η^{\prime}$双混合角形式主义,这增加了这些过程的分支比。在CLF方法中获得的预测,一般来说,大于在ISGW2模型的框架中计算的那些,并且与可用的实验数据更有利。具体来说,我们的结果为独占通道$B \to ηK_{2}^{*}(1430)$和$B \to ϕK_{2}^{*}(1430)$是在最近的实验信息一致。

英文摘要:

We reanalyzed nonleptonic charmless two-body B decays involving tensor mesons in final state motivated by the disagreement between current experimental information and theoretical predictions obtained in ISGW2 model for some $\mathcal{B}(B \to P(V)T)$ (where $P$, $V$ and $T$ denote a pseudoscalar, a vector and a tensor meson, respectively). We have calculated branching ratios of charmless $B \to PT$ and $B\to VT$ modes, using $B \to T$ form factors obtained in the covariant light-front (CLF) approach and the full effective Hamiltonian. We have considered the $η-η^{\prime}$ two-mixing angle formalism for $B \to η^{(\prime)}T$ channels, which increases branching ratios for these processes. Our predictions obtained in the CLF approach are, in general, greater than those computed in the framework of the ISGW2 model and more favorable with the available experimental data. Specifically, our results for exclusive channels $B \to ηK_{2}^{*}(1430)$ and $B \to ϕK_{2}^{*}(1430)$ are in agreement with recent experimental information.

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