Exclusive Semileptonic $D_s$ Decays

We have measured several semileptonic branching fractions of the $D_s$ meson with 586~pb$^{-1}$ integrated luminosity collected by the CLEO-c detector near the $D_s\bar{D}^*_s$ peak production energy of $E_{cm} = 4170$~MeV in $e^+e^-$ collisions. We reconstruct the complete decays by tagging the hadronic decay of one $D_s$, identifying the photon produced by the $\bar{D}_s^*$ decay, and finding the electron and hadron of the semileptonic decay. By inferring the missing neutrino momentum, we count the number of reconstructed exclusive semileptonic decays and compute the branching fractions.