Probing the inverse moment of $B_s$-meson distribution amplitude via $B_s\to {\eta }_s$ form factors

Rusa Mandal, Praveen S Patil, Ipsita Ray

We investigate the inverse moment of the $B_s$-meson light-cone distribution amplitude (LCDA), denoted as ${\lambda }_{B_s}$ and defined within the heavy quark effective theory, through the…