论文标题
$ d _ {（s）} \ to a \ellν$进程的Helicity形式形式的进样
Helicity form factors for $D_{(s)} \to A \ell ν$ process in the light-cone QCD sum rules approach
论文作者
论文摘要
$ d _ {（s）} \ to a \ ell^+ν$带有$ a = a_ = a_ {1}^{ - }，a_ {1}^{0}，b_ {1}^{ - }^{ - }，b_ {1}，b_ {1}^{0}，K_ {1 1400）的螺旋形式因子。在轻单键规则方法中计算出，直到轴向矢量梅森$ a $的Twist-3分布幅度。在“螺旋形”构想中，参数化统一性约束应用于拟合参数。此外，低铰接共振的效果包括在上述形式的串联扩展中。 $ d _ {（s）} \至a \ ell^+ν$半衰减的属性是通过将外形效果扩展到$ q^2 $的整个物理区域来研究的。为了更好地分析，我们的结果与使用LCSR，3PSR和CLFQM方法获得的预测进行了比较。
The helicity form factors of the $D_{(s)}\to A \ell^+ ν$ with $A=a_{1}^{-}, a_{1}^{0}, b_{1}^{-}, b_{1}^{0}, K_{1}(1270)$ and $K_{1}(1400)$ are calculated in the light-cone sum rules approach, up to twist-3 distribution amplitudes of the axial vector meson $A$. In the helicity form factors parametrization the unitarity constraints are applied to the fitting parameters. In addition, the effects of the low-lying resonances are included in series expansions of aforementioned form factors. The properties of the $D_{(s)}\to A \ell^+ ν$ semileptonic decays are studied by extending the form factors to the whole physical region of $q^2$. For a better analysis, a comparison is also made between our results and the predictions obtained using transition form factors via LCSR, 3PSR and CLFQM methods.
