Lpair | a Generator for Lepton Pair Production Program Summary

This manual is derived from the publication in 1]. It contains up to date information on the LPAIR program version 2.3 and some information speciic to the H1 collaboration. Title of the program LPAIR Computer SGI (originally developped on IBM) Programming language FORTRAN 77 Number of program lines ' 5300 Other programs used PDFLIB (for parton distributions), AXOHS (for phase space integration), JETSET 7.4 (for hadronic state evolution), H1-routines from H1GEN, H1MCUTIL, H1UTIL, H1NDB FPACK, SHIFT and BOS for le access and data handling CERNLIB Keywords QED, two-photon processes, Monte-Carlo simulation Nature of physical problem electromagnetic production of lepton pairs in two-photon interactions at high energies Method of solution Monte-Carlo event generation Restrictions Other than two-photon diagrams are not considered Typical running time