I have not seen any ArcSight specific documents, but as with any SIEM, you really just need to get ISE to send the relevant event categories as syslog to the SIEM, and go from there.
Menu :
Administration/System/Logging/Remote Logging Targets
to create a syslog server connection
and
Administration/System/Logging/Logging Categories
to select which event categories should be sent to that syslog server