Two Higgs doublet model and leptoquarks constraints from D meson decays
  We use a combined analysis of the semileptonic and leptonic branching ratios of the D mesons to constrain scalar leptoquark interactions and charged higgs-like interactions. For the THDM type II, we found that a low mass 6.3GeV < m_{H^+} < 63.1GeV for the charged Higgs is favored at 90% C.L. although at 95% there is still agreement with other constraints. We find for the leptoquark states a more restrictive bound than previous analysis. 
J. Barranco, D. Delepine, V. Gonzalez Macias, L. Lopez-Lozano
hep-ph