ISAJET 7.48: A Monte Carlo Event Generator for $pp$, $\bar{p}p$, and $e^{+}{e}^{-}$ Interactions

ISAJET is a Monte Carlo program which simulates $pp$, $\bar{p}p$ and $e^{+}{e}^{-}$ interactions at high energies. This document summarizes the physics underlying the program and describes how to use it. Version~7.48 includes several new features. Anomaly Mediated SUSY Breaking (AMSB) models and right-handed sneutrinos have been added; the latter play a role, e.g., in inverted hierarchy models. A new process generating $Z+\text{2 jets}$ based on the Helas library and MadGraph has been added. Another new process generating Kaluza-Klein gravitons in models with extra dimensions has been added.