Prospects of CKM elements $|V_{cs}|$ and decay constant $f_{D_s^{+}}$ in $D_s^{+}\to {\mu }^{+}{\nu }_{\mu }$ decay at STCF

Jiajun Liu, Xiaodong Shi, Huijing Li +2

We report a feasibility study of pure leptonic decay $D_s^{+}\to {\mu }^{+}{\nu }_{\mu }$ by using a fast simulation software package at STCF. With an expected luminosity of $1{\mathrm{ab}}^{-1}$ colle…