Fermion mass effects on {\Gamma(Z\ra b\bar{b} + a~light~Higgs)} in a two-Higgs-doublet model

Large fermion mass effect on the Yukawa process Z \ra b\bar{b}\ra b\bar{b} h (A) in the entire range of the neutral Higgs boson masses is found. It is particularly important for light Higgs bosons, which are still not excluded experimentally in a general two-Higgs-doublet model.Comment: LaTeX file, 4 pages, 3 figures (in postscript) in a separate fil

New Physics at HERA: Implications for e+e- Scattering at LEP2

The impact of virtual leptoquark or R-parity breaking squark exchange as well as generic contact interactions on the production of quark-antiquark pairs in $e^+e^-$ annihilation, in particular at LEP2, is summarized. An exciting possibility of sneutrino formation in $e^+e^-$ scattering is also mentioned.Comment: 4 pages, LaTeX, 3 figures included, uses aipproc.sty and epsfig; Talk presented at the 5th International Workshop on "Deep Inelastic Scattering and QCD" (DIS '97), Chicago, Illinois, USA, April 14-18, 199