Spin effects in tau lepton pair production at LHC

The proper incorporation of spin effects in inverted perpendicular lepton d ecays is often of importance. In the present work the case of the Z/gamma - -> inverted perpendicular (+)inverted perpendicular (-) production mechanis m is studied in detail. As an example, the effects due to the spin correlat ions on the potential for the Minimal Supersymmetric Standard Model (MSSM) Higgs boson(s) searches in the inverted perpendicular inverted perpendicula r decay channel at the Large Hadron Collider (LHC) are discussed. For these processes, the Standard Model Z/gamma* --> inverted perpendicular inverted perpendicular -pair production is a dominant background. The spin effects in high energy physics reactions, can be implemented up to certain approxim ation, independently of the algorithm and matrix elements used by the produ ction program. Information stored on every generated event can be sufficien t. The algorithm based on such approximation is documented. Question of the theoretical uncertainty is partly discussed.