1. Check Point R81.20 Logging and Monitoring Administration Guide, Chapter 3 "SmartEvent", Section "SmartEvent Components", Page 31: "Correlation Unit - The SmartEvent Correlation Unit analyzes logs from the Security Management Server... and identifies events."
2. Check Point Support Center, sk163413 "ATRG: SmartEvent": "The Correlation Unit (CU) is the 'brain' of SmartEvent. It is the component that reads logs from the Log Server, matches them against the Event Policy, and generates events."