Determinations of form factors for semileptonic $D\to K$ decays and leptoquark constraints

Jian Zhang, Chong-Xing Yue, Chun-Hua Li

By analyzing all existing measurements for $D\to K{\ell }^{+}{\nu }_{\ell }$ ( $\ell =e,\mu$ ) decays, we find that the determinations of both the vector form factor $f_{+}^K(q^2)$ a…