论文标题
$ d^+ \ t to门^+ v P $ decay的两个$ k_1（1270）$ cul的签名
Signatures of the two $K_1(1270)$ poles in $D^+\to νe^+ V P$ decay
论文作者
论文摘要
从理论上讲，我们将$ d^+ \分析到νe^+ρ\ bar k $和$ d^+ \ to n n^+ \ bar k^*π$衰退，以查看可行性检查轴向矢量resonance $ k_1（1270）$的双极性质的可行性。实际上，在UCHPT中，$ k_1（1270）$是通过向量和伪级介子的相互作用动态生成的，并且对于此共振的量子数，获得了两个极点。下质极夫妇主要到$ k^*π$，而较高的质量极到$ρk$，因此我们可以期望产生机制中这些通道的不同反应会增强一个或另一个极点。我们表明，在$ d^+ \到νe^+ v p $中，不同的最终$ VP $通道的重量不同，这反映在最终矢量质量质量符号不变的质量分布的形状中。因此，我们得出的结论是，这些衰减适合于实验区分$ k_1（1270）$共振的预测双极。
We analyze theoretically the $D^+\to νe^+ ρ\bar K$ and $D^+\to νe^+ \bar K^* π$ decays to see the feasibility to check the double pole nature of the axial-vector resonance $K_1(1270)$ predicted by the unitary extensions of chiral perturbation theory (UChPT). Indeed, within UChPT the $K_1(1270)$ is dynamically generated from the interaction of a vector and a pseudoscalar meson, and two poles are obtained for the quantum numbers of this resonance. The lower mass pole couples dominantly to $K^*π$ and the higher mass pole to $ρK$, therefore we can expect that different reactions weighing differently these channels in the production mechanisms enhance one or the other pole. We show that the different final $VP$ channels in $D^+\to νe^+ V P$ weigh differently both poles, and this is reflected in the shape of the final vector-pseudoscalar invariant mass distributions. Therefore, we conclude that these decays are suitable to distinguish experimentally the predicted double pole of the $K_1(1270)$ resonance.
