Investigation for $D^{+}\to {\pi }^{+}\nu \bar{\nu }$ decay process within QCDSR approach

Yu Chen, Hai-Bing Fu, Tao Zhong +2

In the paper, we investigate the charmed meson rare decay process $D^{+}\to {\pi }^{+}\nu \bar{\nu }$ by using QCD sum rules approach. Firstly, the pion twist-2 and twist-3 distribution amplitude…