A supersymmetric extension of the standard model with bilinear R-parity violation

The minimum supersymmetric standard model with bilinear R-parity violation is studied systematically. As we consider low-energy supersymmetry, we exam ine the structure of the bilinear R-parity violating model carefully. We an alyze the mixing of, e.g., Higgs bosons with sleptons, neutralinos with neu trinos and charginos with charged leptons in the model. Possible and some i mportant physics results, e.g. that the lightest Higgs may be heavier than the weak Z-boson at tree level, are obtained. The Feynman rules for the mod el are derived in the 't Hooft-Feynman gauge, which is convenient if pertur bative calculations are needed beyond the tree level.