Vector mesons leading-twist longitudinal distribution amplitudes and related semi-leptonic decays within QCD sum rules

Wan-Bing Luo, Ru-Meng Pan, Ya-Xiong Wang +1

In this work, we focus on the light vector meson leading-twist longitudinal distribution amplitudes (DAs) ${\varphi }_{2;V}^{\parallel }(x,\mu )$ with $V=\rho ,K^{\ast },\varphi$. A new scheme of QCD sum…